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

Abstract

The utility model provides a portable electromagnetic shoot nail connection accelerating device based on spring energy storage, which comprises a magnetic pulse component, a spring energy storage component and a trigger release component which are sequentially arranged and connected, and the magnetic pulse component 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 cost and risk of the device can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to electromagnetic nail shooting connection technical field especially based on spring energy storage portable electromagnetic nail shooting connection acceleration device. BACKGROUND

[0002] In recent years, the process of automobile electrification and intelligentization has accelerated significantly, and the design and manufacturing cycle of automobile product production lines has been greatly shortened. In the process of lightweighting of the vehicle body, many new lightweight high-strength materials such as aluminum alloy and carbon fiber are inevitably used, and the traditional spot welding or arc welding has great limitations and cannot realize welding, therefore, a variety of mechanical connection technologies are derived. High-speed nail shooting connection technology has been widely concerned and applied in the automobile industry due to its simple process, short time, single riveting and reliable structure.

[0003] Electromagnetic forming can excite a huge Lorentz force inside the workpiece through a transient strong magnetic field, and can generate an ultra-high impact force (up to hundreds to thousands of megapascals) in a very short time (microsecond level), which is consistent with the energy demand of nail shooting connection technology, avoids the safety hazards of traditional explosives, and can realize high-speed and high-energy impact processing without mechanical contact. However, the release of transient high energy of electromagnetic forming is often accompanied by strong mechanical recoil force, which requires strengthening the impact structure and safety protection of the equipment, and is easy to cause equipment fatigue or operation risk; at the same time, the high-power pulse power supply has high cost, limited discharge life of the capacitor, and the electromagnetic forming equipment is fixed, has low degree of freedom, and the operation process is complicated, so it is difficult to realize low-cost and high-reliability mass production.

[0004] In the prior art, the spring energy storage mechanism is mainly used for mechanical energy storage, but has not been optimized with electromagnetic pulses to solve the above problems.

[0005] The utility model realizes precise control of output energy and lightweight of the equipment through electromagnetic-spring energy collaborative release. UTILITY MODEL CONTENTS

[0006] The utility model provides a kind of portable electromagnetic nail shooting connection acceleration device based on spring energy storage, and the structure is simple, electromagnetic energy is stored and released quantitatively by two times, reduce the cost and risk of device, it is applicable to the efficient connection of lightweight alloy sheet.

[0007] A portable electromagnetic nail shooting connection accelerating device based on spring energy storage, the accelerating device comprises sequentially connected magnetic pulse assembly, spring energy storage assembly and trigger release assembly, the magnetic pulse assembly comprises discharge control system and coil (20), first punch (4); the spring energy storage assembly comprises energy storage elastic member arranged in the first limiting sleeve (6) and trigger (9), a plurality of clamping grooves are arranged on the inner wall of the first limiting sleeve along the sleeve direction; during energy storage, the transient electromagnetic force of the coil drives the first punch to impact the tail end of the trigger, so that the trigger moves to the trigger release assembly, the head end of the trigger is connected with the tail end of the energy storage elastic member to store energy when compressed, and the trigger is inserted into different clamping grooves of the first limiting sleeve with the pin part at the side wall 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.

[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 square pin spring (8) at the side wall of the trigger is inserted into different clamping grooves of the first limiting sleeve to prevent back-off, and the energy storage spring is stored in stages by stage compression.

[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 with the head end of the energy storage spring, and a cylindrical pin (11) with a supporting spring is arranged at the side wall of the second punch; the cylindrical pin is the trigger part of the trigger release assembly, when the accelerating device is energized, the cylindrical pin passes through the through hole at the side wall of the second limiting sleeve to fix the second punch at the second limiting sleeve.

[0010] The top of the side wall of the trigger is provided with an inclined surface, and the top of the cylindrical pin is provided with a hemispherical surface; when the accelerating device is energized in stages, the inclined surface of the side wall of the trigger is connected with the cylindrical pin of the trigger release assembly and the cylindrical pin is pressed back into the through hole at the side wall of the second limiting sleeve, so that the second punch can move under the elastic force of the energized energy storage spring to release the elastic potential energy of the energy storage spring.

[0011] The coil (20) is arranged at the tail end of the first punch (4), and the coil (20) and the first punch (4) are arranged in the inner cavity of the sleeve (2) with an end cover (1);

[0012] The head end of the second punch is provided with a punch rod (13) for high-speed impact of the nail (15).

[0013] The sleeve is provided with a first punch reset spring (18), and the two ends of the first punch reset spring are connected with the first punch and the limiting plate (4) respectively; after the coil stops applying electromagnetic force, the first punch is reset under the elastic force of the first punch reset spring.

[0014] The trigger reset spring (24) is connected between the first punch head end and the trigger tail end, is stretched during the energy storage of the energy storage spring, and is reset under the elastic force driving of the trigger reset spring when the elastic potential energy of the energy storage spring is released and the square pin is not inserted into the clamping groove of the first limiting sleeve.

[0015] The coil is provided with a rubber pad (21) for buffering, and the two ends of the coil are connected with a discharge control system, and the electromagnetic force generated by the discharge control system drives the first punch to move through the driving copper plate (3).

[0016] The cylindrical wall of the first limiting sleeve is symmetrically provided with symmetric square notches matched with the square pin along the central axis of the first limiting sleeve, and one side of the symmetric square notches is a 45° inclined surface.

[0017] The square pin and the square pin spring are embedded in the trigger, and the height of the square pin does not exceed the first limiting sleeve.

[0018] The utility model discloses a portable electromagnetic nail shooting connecting acceleration device and method based on spring energy storage, utilize the huge repulsive force of electromagnetic coil and workpiece compression spring, realize energy enhancement effect through the synergic release mechanism of electromagnetic energy and spring energy storage, the device includes magnetic pulse subassembly, spring energy storage subassembly and trigger release subassembly, the magnetic pulse subassembly includes discharge control system and sleeve, end cover, coil and first punch, and the two ends of the coil are connected with the discharge control system, produce transient electromagnetic force and buffer under the rubber pad, the spring energy storage subassembly one end is impacted and stores energy, and one end is fixed by the limiting, includes first limiting sleeve, trigger and square pin and square pin spring, and the square pin is embedded in the clamping groove of first limiting sleeve, and electromagnetic impact energy is stored in stages, the trigger release subassembly includes trigger, energy storage spring, second limiting sleeve, second punch and cylindrical pin and cylindrical pin spring, and the trigger collides with the cylindrical pin, and the elastic potential energy of energy storage spring is released accurately, and the impact rod on the second punch is driven to high speed and hits the nail, the utility model discloses simple structure, through electromagnetic energy secondary storage and quantitative release, reduce the cost and risk of device, be applicable to the efficient connection of light alloy sheet.

[0019] Compared with the prior art, the utility model discloses the beneficial effect is: through optimization release energy structure, reduce the number of turns of winding and sectional area, reduce the reverse Lorentz force while promoting electromagnetic force density, thereby improve security and coil life.

[0020] The utility model discloses the beneficial effect still lies in:

[0021] 1, through optimization release energy structure, reduce the number of turns of winding and sectional area, reduce the reverse Lorentz force while promoting electromagnetic force density, thereby improve security and coil life.

[0022] 2, adopt spring energy storage mechanism, temporarily store in high -strength spring in primary loop discharge energy, realize instantaneous acceleration of shot nail through electromagnetic and spring energy coordinated release, ensure the reliable penetration of lightweight alloy sheet.

[0023] 3, utilize the characteristics of each different spring, after each loop discharge impact, can realize reset, easy to the next process, adjust the length of trigger outer tube, can ensure the compression of energy storage spring when each pressure cylinder pin, thereby realize energy quantitative release, under the premise of ensuring penetration kinetic energy controllable, simplify the drive structure, realize equipment low cost. BRIEF DESCRIPTION OF DRAWINGS

[0024] The utility model is further explained in detail in combination with the drawings and specific embodiment:

[0025] ATTACH Figure 1 It is whole structure schematic drawing for device;

[0026] ATTACH Figure 2 It is primary energy storage schematic diagram for device;

[0027] ATTACH Figure 3 It is energy storage spring trigger schematic diagram;

[0028] ATTACH Figure 4 It is square pin and card slot cooperation detail schematic drawing;

[0029] ATTACH Figure 5 It is cylinder pin and recess cooperation detail schematic drawing;

[0030] ATTACH Figure 6 It is device work flow schematic diagram;

[0031] attached Figure 7 for the overall appearance of the device schematic diagram;

[0032] In the figure: 1, end cover; 2, sleeve; 3, drive copper plate; 4, first punch; 5, limiting plate; 6, first limiting 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 shooting; 16, second limiting sleeve; 17, second punch; 18, first punch reset spring; 19, M6x20 cross screw; 20, coil; 21, rubber pad; 22, M8 hexagonal head nut; 23, M8x40 hexagonal head bolt; 24, trigger reset spring. DETAILED DESCRIPTION

[0033] The utility model will be made further detailed explanation in combination with the drawings and specific implementation.

[0034] As shown in the figure, a kind of portable electromagnetic nail shooting connection acceleration device based on spring energy storage, the acceleration device includes sequentially arranged connection's magnetic pulse component, spring energy storage component and trigger release component, the magnetic pulse component includes discharge control system and coil 20, first punch 4;Spring energy storage component includes the energy storage elastic element in first limiting sleeve 6, trigger 9, multiple clamping grooves are arranged in the wall of first limiting sleeve along sleeve direction;When energy storage, the transient electromagnetic force of coil drives first punch to impact the tail end of trigger to make trigger move to trigger release component, and the head end of trigger is connected with the tail end of energy storage elastic element to make it store energy when compression, and trigger is inserted into the different clamping grooves of first limiting sleeve with the pin component at its side wall to store energy in stages;When each stage of energy storage is completed, trigger moves to the trigger piece of trigger release component and is connected with it.

[0035] The energy storage elastic element is energy storage spring 10, during energy storage process of energy storage spring, trigger is inserted into the different clamping grooves of first limiting sleeve with the square pin spring 8 of square pin 7 at its side wall to prevent back-off, and makes energy storage spring store energy in stages by compression in stages.

[0036] The trigger release component includes second punch 17 arranged in second limiting sleeve 16;The head end of second punch is connected with the head end of energy storage spring, and cylindrical pin 11 with support spring is arranged at the side wall of second punch, and the cylindrical pin is the trigger piece of trigger release component, when acceleration device stores energy, cylindrical pin is fixed at second limiting sleeve with the through hole at the side wall of second limiting sleeve.

[0037] The side wall top of the trigger is provided with an inclined surface, and the top of the cylindrical pin is a hemisphere, when the energy storage of the accelerating device is completed in stages, the inclined surface of the side wall of the trigger is connected with the cylindrical pin of the trigger release assembly and the cylindrical pin is pressed back into the through hole in the side wall of the second limiting sleeve, so that the second punch can be driven to move by the elastic force of the energy storage spring after energy storage, and the elastic potential energy of the energy storage spring is released.

[0038] The coil 20 is arranged at the tail end of the first punch 4, and the coil 20 and the first punch 4 are arranged in the inner cavity of the sleeve 2 of the end cover 1.

[0039] The second punch head is provided with a punch rod 13 for high-speed impact of the nail 15.

[0040] The sleeve is provided with a first punch reset spring 18, and the two ends of the first punch reset spring are connected with the first punch and the limiting plate 4 respectively, and when the coil stops applying electromagnetic force, the first punch is reset under the driving of the elastic force of the first punch reset spring.

[0041] The trigger reset spring 24 is connected between the first punch head and the tail end of the trigger, and the trigger reset spring is stretched during the energy storage of the energy storage spring, and when the elastic potential energy of the energy storage spring is released and the square pin is not inserted into the clamping groove of the first limiting sleeve, the trigger is reset under the driving of the elastic force of the trigger reset spring.

[0042] The coil is provided with a rubber pad 21 for buffering, and the two ends of the coil are connected with a discharge control system, and the electromagnetic force generated by the discharge control system drives the copper plate 3 to drive the first punch to move.

[0043] The cylinder wall of the first limiting sleeve is symmetrically provided with a symmetric square notch matched with the square pin with the central axis of the first limiting sleeve as the axis of symmetry, and one side of the symmetric square notch is an inclined surface with an angle of 45°; each pair of square notches is distributed along the cylinder wall of the first limiting sleeve in the direction of the first limiting sleeve.

[0044] The square pin and the square pin spring are embedded in the trigger, and the height of the square pin 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 into the next square notch.

[0045] The working method of the portable electromagnetic nail connecting accelerating device based on spring energy storage, 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 when the cylindrical pin of the second punch is pressed each time, so that the quantitative release of the elastic potential energy of the electromagnetic force conversion is realized, including the following steps.

[0046] Step S1: assembling the components of the accelerating device; adjusting the length of the first limiting sleeve where the trigger is located.

[0047] The coil of polyimide adhesive tape wound on the pretreated surface is spliced with the positive and negative electrodes of the conductive strip of the magnetic pulse device, and the first punch reset spring is welded at both ends with the limiting plate and the first punch, the trigger reset spring is welded at both ends with the limiting plate and the trigger, the square pin spring is welded with the square pin and the trigger, and the cylindrical pin spring is welded with the cylindrical pin and the second punch;

[0048] Step S2: turn on the power supply, perform the first discharge, the trigger is impacted, the square pin enters the second clamping groove from the first clamping groove of the first limiting sleeve, and the energy storage spring is compressed by a distance, and the first punch reset spring makes the first punch return to the initial position;

[0049] Step S3: continue to turn on the power supply, perform the second discharge, and the square pin is clamped into the third clamping groove, at this time, the trigger and the cylindrical pin are close again, and the spring energy storage is increased;

[0050] Step S4: aim the nail at the sample, turn on the power supply, when the subsequent discharge impact makes the cylindrical pin be pressed into the groove of the second limiting sleeve, the elastic potential energy of the energy storage spring is released, drives the second punch to accelerate, and the punch rod collides with the nail to make it shoot into the sample at a high speed;

[0051] Step S5: manually press the square pin on both sides of the trigger into the first limiting sleeve, reset the trigger under the action of the trigger reset spring, and the device returns to the initial state.

[0052] Example 1:

[0053] With reference to the drawings, the electromagnetic nail shooting connection acceleration device provided by the utility model, as shown in Figure 1 , contains end cover 1, sleeve 2, drive copper plate 3, first punch 4, limiting plate 5, first limiting sleeve 6, and comprises a magnetic pulse assembly, a spring energy storage assembly (as Figure 2 ) and a trigger release assembly (as Figure 3 ), the magnetic pulse assembly comprises a discharge control system and sleeve 2, end cover 1, coil 20 and first punch 4, coil 20 has positive and negative electrode conductive strips connected with the discharge control system, and first punch 4 is subjected to a huge electromagnetic pulse force during discharge; the spring energy storage assembly is impacted and stored at one end and fixed at the other end, and comprises first limiting sleeve 6, trigger 9, square pin 7 and square pin spring 8, as shown in Figure 4 , square pin 7 is embedded in the clamping groove of first limiting sleeve 6, so that the energy can be stably stored after each spring energy storage; the trigger release assembly comprises trigger 9, energy storage spring 10, second limiting sleeve 16, second punch 17, punch rod 15, cylindrical pin 11 and cylindrical pin spring 12, after triggering, cylindrical pin 11 is released with second punch 17 in the inner groove of second limiting sleeve 16, and punch rod 13 accelerates to impact the connected part.

[0054] As shown in Figure 7 The end cover 1 is connected with the sleeve 2 by M8 bolts 23. According to the mechanical design specification, the bolt distance from the inner wall C1 is 13 mm, and the distance from the outer edge C2 is 11 mm. Due to the existence of the notch, the bolts are distributed in a pentagonal shape.

[0055] As shown in Figure 1 The driving copper plate 3 is in close contact with the coil 20. The copper plate has strong conductivity, and the coil 20 is made of red copper. When the coil 20 passes through the pulse current, the driving copper plate 3 is subjected to a huge driving force, which pushes the first punch 4 to move forward. The coil 20 is limited in one direction by the stepped design inside the sleeve 2, and in the other direction by the rubber pad 21 and the M8 nut 22. The first punch 4 is connected with the driving copper plate 3 by M6 cross screws 19. The two ends of the first punch return spring 18 are welded with the first punch 4 and the limiting plate 5. After the first pulse current, the first punch 4 and the driving copper plate 3 return to the initial position through the spring, realizing the reset effect. The sleeve 2 is cooperated with the first limiting sleeve 6 by surface screwing. In order to ensure the strength of the device, the length of the internal thread of the sleeve 2 is greater than the length of the screwing of the two. The limiting plate 5 is located between the two to realize positioning. The middle part is provided with a conical opening and a cylindrical protrusion for spring positioning. The trigger return spring 24 is connected with the trigger 9.

[0056] As shown in Figure 4 The first limiting sleeve 6 is provided with two symmetrical square notches matched with 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 into the next notch. The limiting plate 5 and the trigger 9 are provided with two symmetrical small cylinders in the direction perpendicular to the two square pins 7, and the two ends are welded and fixed with the trigger return spring 24.

[0057] As shown in Figure 5 The second limiting sleeve 16 is provided with four symmetrical circular holes and four non-penetrating inner grooves in the axial direction. The outer wall has an annular plate with the same size as the inner diameter of the first limiting sleeve 6, forming an axial and radial positioning effect. 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 top of the four cylindrical pins 11 is a hemispherical structure, which can slide into the groove of the second limiting sleeve 16 when pressed. The guide ring 14 is connected with 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 0.5 mm gap. The surface roughness grade is required to be high, and the oil lubrication is required during work. The second punch 17 is connected with the punch rod 13 by screwing. Different diameters of the punch rod 13 can be selected to match the nail 15 of different sizes.

[0058] As shown in Figure 3As shown, the trigger reset spring 24 is stretched to the maximum after completing a charge, the square pin 7 is embedded in the lowest slot of the first limiting sleeve 6, and the two square pins 7 need to be manually compressed inward. Under the tension of the trigger reset spring 24, the trigger 9 completes reset.

[0059] Embodiment 2:

[0060] As shown in Figures 1 to 3 and Figure 6 A working method of a portable electromagnetic nail shooting connection acceleration device based on spring energy storage, which is carried out in the following steps:

[0061] Step S1: The coil 20 of the polyimide tape wrapped around the surface after pretreatment is spliced with the positive and negative electrodes of the magnetic pulse device. The first punch reset spring 18 is welded at both ends with the limiting plate 5 and the first punch 4, the trigger reset spring 24 is welded at both ends with the limiting plate 5 and the trigger 9, the square pin spring 8 is welded with the square pin 7 and the trigger 9, and the cylindrical pin spring 12 is welded with the cylindrical pin 11 and the second punch 17;

[0062] Step S2: Assemble the device parts from inside to outside in order, connect the power supply, and perform the first discharge. The square pin 7 is impacted into the next gap, the spring is compressed by a distance, and the first punch reset spring 18 makes the first punch 4 return to the initial position;

[0063] Step S3: Continue to connect the power supply and perform the second discharge. Similar to the previous step, the square pin 7 is clamped into the third gap, and the trigger 9 is close to the cylindrical pin 11 at this time, and the spring energy storage increases;

[0064] Step S4: Align the nail 15 with the sample, connect the power supply, and the third impact makes the cylindrical pin 11 enter the groove of the second limiting sleeve 16 under pressure. The elastic potential energy is released, the second punch 17 accelerates, the punch rod 13 collides with the nail 15, and they are shot into the sample at a high speed;

[0065] Step S5: Manually press the two square pins 7 into the first limiting sleeve 6, and complete the reset of the trigger 9 under the action of the trigger reset spring 24, and the device returns to the initial state.

Claims

1. A portable electromagnetic pin clinching acceleration device based on spring energy storage, characterized by: The acceleration device comprises sequentially connected magnetic impulse assembly, spring energy storage assembly and trigger release assembly, the magnetic impulse assembly comprises discharge control system and coil (20), first punch (4); the spring energy storage assembly comprises trigger (9) and energy storage elastic element arranged in first limiting sleeve (6), a plurality of clamping grooves are arranged on the inner wall of the first limiting sleeve along the sleeve direction; during energy storage, the transient electromagnetic force of the coil drives the first punch to impact the tail end of the trigger to make the trigger move to the trigger release assembly, the head end of the trigger is connected with the tail end of the energy storage elastic element to make it store energy when compressed, and the trigger is inserted into different clamping grooves of the first limiting sleeve with the pin part at the side wall 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 same. The energy storage elastic element is an energy storage spring (10), during the energy storage process of the energy storage spring, the square pin (7) with square pin spring (8) at the side wall of the trigger is inserted into different clamping grooves of the first limiting sleeve to prevent back-off, and the energy storage spring is stored in stages by stage compression. The trigger release assembly comprises second punch (17) arranged in second limiting sleeve (16); the tail end of the second punch is connected with the head end of the energy storage spring, and a cylindrical pin (11) with supporting spring is arranged at the side wall of the second punch; the cylindrical pin is the trigger part of the trigger release assembly, when the acceleration device stores energy, the cylindrical pin passes through the through hole at the side wall of the second limiting sleeve to fix the second punch at the second limiting sleeve.

2. A portable electromagnetic pin joining acceleration device based on spring energy storage according to claim 1, characterized in that: The top of the side wall of the trigger is provided with an inclined surface, and the top of the cylindrical pin is provided with a hemispherical surface; when the acceleration device completes the stage energy storage, the inclined surface of the side wall of the trigger is connected with the cylindrical pin of the trigger release assembly and the cylindrical pin is pressed back into the through hole at 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 to release the elastic potential energy of the energy storage spring.

3. A portable electromagnetic pin joining acceleration device based on spring energy storage according to claim 2, characterized in that: The coil (20) is arranged at the tail end of the first punch (4), and the coil (20) and the first punch (4) are arranged in the inner cavity of the sleeve (2) with end cover (1).

4. A portable electromagnetic pin joining acceleration device based on spring energy storage according to claim 3, characterized in that: A first punch reset spring (18) is arranged in the sleeve, and the two ends of the first punch reset spring are connected with the first punch and the limiting plate (5) respectively; after the coil stops applying electromagnetic force, the first punch is reset under the elastic force of the first punch reset spring.

5. A portable electromagnetic pin joining acceleration device based on spring energy storage according to claim 2, 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, and when the elastic potential energy of the energy storage spring is released and the square pin is not inserted into the clamping groove of the first limiting sleeve, the trigger is reset in the direction of the coil under the elastic force of the trigger reset spring.

6. A portable electromagnetic pin joining acceleration device based on spring energy storage according to claim 2, characterized in that: A rubber pad (21) for buffering is arranged at the coil; the two ends of the coil are connected with the discharge control system, and the electromagnetic force generated by the coil drives the first punch to move through the driving copper plate (3).

7. A portable electromagnetic pin joining acceleration device based on spring energy storage according to claim 1, characterized in that: The cylindrical wall of the first limiting sleeve is symmetrically provided with symmetric square notches matched with the square pin with the central axis of the first limiting sleeve as the axis of symmetry, one side of the symmetric square notches is an inclined surface; the square notches are distributed along the cylindrical wall of the first limiting sleeve in the direction of the first limiting sleeve. The square pin and square pin spring are embedded at the trigger, and the height thereof 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 into the next square gap.

8. A portable electromagnetic pin joining acceleration device based on spring energy storage according to claim 2, characterized in that: The second punch head end is provided with a punch rod (13) for high-speed impact of the nail (15).

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