A new integrated spot welding and coining alloy sheet joining device

Abstract

The application discloses a novel alloy sheet connecting device integrating spot welding and stamping, and belongs to the field of spot welding connection, stamping connection and novel material composite connection. The whole device is composed of four parts, i.e. a rack unit 1, a jet unit 2, an electromagnetic ejection unit 3 and a composite connecting unit 4. The rack unit is the main body of the device and is used for mounting and positioning the remaining units. The jet unit can realize mold cooling and auxiliary demolding through cooperation of an upper die, a supporting seat, an upper spot welding platform and a gas tank. The electromagnetic ejection unit is mainly composed of a guide rail, a coil winding, a base and a punch, the coil winding can provide stamping power for the punch, and the stamping work is completed under the guidance of the guide rail and in cooperation with the upper die, so that the stamping connection efficiency is ensured. The composite connecting unit is mainly composed of a lower spot welding platform, a platform support, a motor and a spot welding head, and the lower spot welding platforms can be driven by the motor to approach each other at the same time of stamping connection, so that the spot welding function is realized. The application not only improves the connection efficiency, quality and adaptability of alloy sheets, but also increases the service life of the mold and enhances the practicability of the device.

Description

TECHNICAL FIELD

[0001] The present application relates to a new type of integrated spot welding and stamping plate connecting device, belonging to the field of spot connection and new material composite connection. BACKGROUND

[0002] With the rapid development of industry, in order to realize the production of light equipment, alloy plates with high strength and low density characteristics are widely used in national major equipment and national defense military equipment, and the demand for alloy plate connecting devices has also increased continuously in recent years.

[0003] The quality of plate connection will affect the service life of the whole machine, and poor connection quality may even cause safety accidents, so the manufacturing industry has higher and higher requirements on the connection efficiency and joint quality of alloy plates. The traditional spot welding and self-punching riveting process has problems such as unsatisfactory joint mechanical properties, difficulty in plate demolding, and low connection efficiency, while multiple connection processes are beneficial to the joint quality guarantee and reliability improvement. Therefore, developing a new type of plate connecting device with composite connection process has special significance and important role for mass production of new equipment.

[0004] In view of the increasing demand for alloy material connection, the current alloy plate connecting devices mainly have the following three types: (1) alloy plate spot welding connecting device. For example, the patent CN108872372B introduces ultrasonic imaging assisted spot welding joint quality inspection, which has the advantages of being able to exclude unqualified welding points, and the disadvantages of poor adaptability and inability to connect alloy plates with good thermal conductivity. (2) Alloy plate stamping connection device. For example, the patent CN108543872A designs a unique punch structure, which has the advantage of fast demolding of the punch, and the disadvantage of high mold temperature during work, which affects the service life of the mold. (3) Alloy plate riveting device. For example, the patent CN101920294B designs a riveting joint heating unit, which has the advantage of reducing the strength of the alloy plate after heating the riveting joint to facilitate connection, and the disadvantage of needing to heat the joint before stamping, which reduces the connection efficiency. From the above three types of connection devices, it can be seen that the first and third types of devices need to improve the connection method to cope with the connection of alloy plates with special properties such as high thermal conductivity, while ensuring the connection efficiency; the second type of device needs to add a cooling system to reduce the mold temperature and improve the mold life.

[0005] In order to overcome the above problems, the present application discloses a new type of integrated spot welding and stamping alloy plate connecting device, which comprehensively considers and improves the shortcomings of the above-mentioned alloy plate connecting devices, and innovatively combines electromagnetic ejection drive with a jet unit to replace the traditional gas-liquid combination form, which can efficiently and adaptively realize effective connection of different alloy plates, and can cool the mold after connection. SUMMARY

[0006] The application is used for solving the problems of poor adaptability, low efficiency and lack of cooling of the existing connecting device when connecting alloy plates. A new alloy plate connecting device integrating spot welding and stamping is provided, the spot welding and stamping composite connection guarantee device ensures the adaptability of various alloy plates, the electromagnetic ejection drive improves the connection efficiency, and the jet unit is designed to cool and assist demolding;

[0007] The application makes principle innovation aiming at the problems of the existing alloy plate connecting device, and the basic idea is: ① the spot welding and stamping composite connection is used to ensure the connection quality of alloy plates with different properties, four welding heads are arranged for spot welding, and a stamping connection working area is designed at the center of the spot welding joint for composite connection. The joint mainly consists of two parts, one is the spot welding joint composed of four spot welding points to ensure the successful connection of alloy plates, and the other is the stamping joint at the center of the spot welding joint to ensure the stable connection of plates with high thermal conductivity. ② in order to improve the connection efficiency, the stamping punch is driven by electromagnetic ejection, which ensures the high efficiency of the stamping connection work and also makes the equipment more energy-saving and environment-friendly. ③ in order to realize the cooling of the mold during the working process, a jet unit is designed, which can efficiently complete the mold cooling work and also assist the demolding of alloy plates.

[0008] In order to realize the above purpose and principle, the technical scheme of the application is as follows:

[0009] A new alloy plate connecting device integrating spot welding and stamping consists of four parts of a rack unit 1, a jet unit 2, an electromagnetic ejection unit 3 and a composite connection unit 4.

[0010] The features of the rack unit 1 include: upper stepped hole 1.1, side hole 1.2, lower stepped hole 1.3, square hole 1.4, sliding groove 1.5 and gear shaft hole 1.6.

[0011] The upper stepped hole 1.1 penetrates the upper part of the rack unit 1 along the z-axis direction and is used for installing the jet unit 2; the four side holes 1.2 are through holes and are uniformly distributed on the four sides of the rack unit 1; the lower stepped hole 1.3 penetrates the lower part of the rack unit 1 along the z-axis direction, is located in the negative direction of the z-axis of the upper stepped hole 1.1, is coaxially arranged with the upper stepped hole 1.1 and is used for installing the electromagnetic ejection unit 3; the lower stepped hole 1.3 is provided with stepped sliding grooves 1.5 on both sides, which are parallel to the axis direction of the lower stepped hole 1.3; a square hole 1.4 is opened on one side of the rack unit 1, and a gear shaft hole 1.6 is opened on the other side, and both of them are communicated with the sliding groove 1.5 at the rear of the rack unit 1.

[0012] The rack unit 1 is formed by casting and welding process, and after being cast into two parts, it is connected by welding; the side hole 1.2 is used for installing wires, and the sliding groove 1.5 is used for positioning the movement of the composite connection unit along the z-axis direction.

[0013] The jet unit 2 comprises a support seat 2.1, an upper die 2.2, a rubber sleeve 2.3, an upper spot welding platform 2.4, an exhaust groove 2.4.1, a boss 2.4.2, a cavity 2.4.3, an upper spot welding head 2.5, a gas conduit 2.6, and a gas tank 2.7;

[0014] The gas is first output by the gas tank 2.7, input into the support seat 2.1 through the gas conduit 2.6, and located in the negative z-axis direction of the upper stepped hole 1.1 and coaxially arranged with the upper stepped hole 1.1 and connected with the upper stepped hole 1.1 through threaded connection; the upper die 2.2 is located in the negative z-axis direction of the support seat 2.1 and coaxially arranged with the support seat 2.1 and connected with the support seat 2.1 through the rubber sleeve 2.3; the rubber sleeve 2.3 is fixed on the top of the upper die 2.2 through a screw and plays a role of fixing before and after jet; the upper spot welding platform 2.4 is located in the negative z-axis direction of the support seat 2.1, coaxially arranged with the support seat 2.1, connected with the upper stepped hole 1.1 through threaded connection, and four upper spot welding heads 2.5 are evenly distributed in four holes on the lower surface of the upper spot welding platform 2.4 and connected with the upper spot welding platform 2.4 through threaded connection;

[0015] The upper die 2.2 is located in the cavity formed by the support seat 2.1 and the upper spot welding platform 2.4 and is in large-gap cooperation with the cavity 2.4.3, the side wall of the cavity 2.4.3 has an inclination angle of 20°, and the inner wall of the upper spot welding platform 2.4 close to the bottom surface is evenly distributed with four exhaust grooves 2.4.1, which ensures that the gas can cool the upper die 2.2 and be sprayed out from the exhaust groove 2.4.2 at the same time, and assists the alloy sheet in demolding;

[0016] The diameter of the rubber sleeve 2.3 is slightly larger than the through hole of the support seat 2.1, so that it can be embedded in the through hole of the support seat 2.1 after the punch 3.2 is punched, thereby ensuring the stability of the upper die 2.2;

[0017] The boss 2.4.2 reduces the contact area between the upper spot welding platform 2.4 and the alloy sheet, thereby playing a role of protecting the upper spot welding platform 2.4; the cooperation between the upper spot welding head 2.5 and the upper spot welding platform 2.4 is small-gap cooperation through threaded connection, which ensures that the worn welding head can be easily replaced, and when the upper spot welding head 2.5 is installed in the upper spot welding platform 2.4, it needs to protrude 0.5 millimeters along the negative z-axis direction, thereby ensuring that it can fully contact the alloy sheet during work;

[0018] The electromagnetic ejection unit 3 comprises a guide rail 3.1, a punch 3.2, a coil winding 3.3, a buffer spring 3.4, a base 3.5, and a fixed disc 3.6;

[0019] The guide rail 3.1 is located in the lower stepped hole 1.3, which is coaxially arranged with the lower stepped hole 1.3, and the base 3.5 is located in the negative direction of the z-axis of the guide rail 3.1. The lower part of the guide rail 3.1 and the base 3.5 are connected to the bottom surface of the rack unit 1 by bolts, and the upper part of the guide rail 3.1 is sleeved with a fixing disc 3.6, which is matched with the guide rail 3.1 in a small gap. The fixing disc 3.6 is connected to the stepped surface of the lower stepped hole 1.3 by screws, which plays a role in stabilizing the guide rail 3.1; the punch 3.2 is placed in the guide rail 3.1, which is matched in a gap to make the punch 3.2 move smoothly in the guide rail 3.1 to complete the stamping work; the coil winding 3.3 is arranged between the fixing disc 3.6 and the guide rail 3.1, which provides stamping power for the punch 3.2 to stamp the alloy plate, and the buffer spring 3.4 is arranged in the negative direction of the z-axis of the punch 3.2 and connected to the top surface of the base 3.5 by welding, which plays a buffering role after the punch 3.2 is stamped and falls back;

[0020] The rising stamping action of the punch 3.2 is powered by the coil winding 3.3, and after the stamping is completed, it falls back under the action of its own gravity, eliminating the manual falling operation, realizing the traditional stamping action and improving the stamping efficiency. In addition, the punch 3.2 stays in the guide rail 3.1 for a certain length after the stamping is completed, which ensures that it will not be separated from the guide rail, and its surface is stepped, which reduces the contact area between its outer surface and the inside of the guide rail 3.1, and reduces the resistance in the movement process of the punch 3.2;

[0021] The composite connection unit 4 includes a motor 4.1, a gear shaft 4.2, a gear 4.3, a platform support 4.4, a rack 4.4.1, a sliding block 4.4.2, a protruding lower spot welding platform 4.5, a lower spot welding head 4.6, a shock pad 4.7, and a bolt spring 4.8;

[0022] The motor 4.1 is installed in the square hole 1.4 on the side of the frame, is connected with the frame unit 1 by welding, drives the gear 4.3 to rotate through the gear shaft 4.2 installed in the gear shaft hole 1.6, and provides power for the composite connecting unit 4; the rack 4.4.1 is designed on the side of the platform support 4.4 along the negative direction of the x axis, is engaged with the gear 4.3 to realize the up-down movement of the composite connecting unit 4, the sliders 4.4.2 on both sides of the platform support 4.4 along the x axis are matched with the sliding groove 1.5 to assist positioning, and the point welding and the alloy sheet are separated; the lower point welding platform 4.5 is located in the lower stepped hole 1.3, is arranged in the z axis positive direction of the platform support 4.4 through bolt connection, is uniformly distributed with four threaded holes around for installing the lower point welding head 4.6, the four lower point welding heads 4.6 are coaxially arranged along the z axis corresponding to the four upper point welding heads 2.5, and the point welding function of the device is realized; the bolt spring 4.8 is located between the lower point welding platform 4.5 and the platform support 4.4, the upper point welding platform 2.4 can be pressed tightly to assist stamping connection when the upper point welding platform 2.4 and the lower point welding platform 4.5 are folded by the contraction of the bolt spring 4.8; the shockproof washer 4.7 is made of rubber material, is installed in the stepped hole of the lower point welding platform 4.5 in small interference fit, and plays a buffering protection role when the upper point welding platform 2.4 and the lower point welding platform 4.5 are folded and the sheet is pressed tightly;

[0023] The platform support 4.4 is designed with a slider structure at both ends along the x axis and is matched with the sliding groove 1.5 in small clearance, stability of the up-down movement is ensured, a through hole is arranged in the middle of the platform support 4.4 and the lower point welding platform 4.5 for passing the punch 3.2, the four lower point welding heads 4.6 are coaxially arranged with the four upper point welding heads 2.5, and the quality of the welded joint is ensured;

[0024] The cooperation between the lower point welding head 4.6 and the lower point welding platform 4.5 is small clearance threaded connection, the worn welding head can be replaced conveniently, and the lower point welding head 4.6 needs to protrude 0.5 mm along the z axis positive direction when being installed in the lower point welding platform 4.5, so that sufficient contact with the alloy sheet is ensured during work.

[0025] The beneficial effects of the present application are:

[0026] 1. The upper and lower molds are inverted, so that the punch can fall based on the gravity of the punch structure itself after completing the stamping operation, and the demolding efficiency is improved;

[0027] 2. The punch is driven to stamp in the form of electromagnetic ejection, the operation time is shorter than that of the traditional gas pressure driving or gas-liquid mixed driving, and the production efficiency is higher;

[0028] 3. The jet type base designed in the present application solves the cooling problem of local friction of the mold during stamping, improves the service life of the mold, and relies on the jet force to demold the sheet, simplifying manual operation;

[0029] 4. The device of the present invention can meet three different connection processes, namely stamping, spot welding and welding-riveting, on one device according to actual needs, and has good adaptability to alloy plates with different requirements for thermal conductivity, strength and plasticity. Attached Figure Description

[0030] Figure 1 A complete and sectional view of a novel alloy sheet joining device integrating spot welding and embossing;

[0031] Figure 2 Rack unit structure and sectional view;

[0032] Figure 3 Jet unit structure and cross-sectional view;

[0033] Figure 4 Structural diagram of the upper spot welding platform;

[0034] Figure 5 Electromagnetic catapult unit structure and cross-sectional view;

[0035] Figure 6 Composite connection unit structure and sectional view;

[0036] Figure 7 Platform support structure diagram;

[0037] Figure 8 Device workflow diagram.

[0038] The following are the labels in the diagram: 1. Frame unit, 1.1 Upper stepped hole, 1.2 Side hole, 1.3 Lower stepped hole, 1.4 Square hole, 1.5 Slide groove, 1.6 Gear shaft hole; 2. Air jet unit, 2.1 Support base, 2.2 Upper mold, 2.3 Rubber sleeve, 2.4 Upper spot welding platform, 2.4.1 Exhaust groove, 2.4.2 Boss, 2.4.3 Cavity, 2.5 Upper spot welding head, 2.6 Gas conduit, 2.7 Air box; 3. Electromagnetic catapult unit, 3.1 Guide rail, 3.2 Punch, 3.3 Coil winding, 3.4 Buffer spring, 3.5 Base, 3.6 Fixing plate; 4. Composite connection unit, 4.1 Motor, 4.2 Gear shaft, 4.3 Gear, 4.4 Platform support, 4.4.1 Rack, 4.4.2 Slider, 4.5 Lower spot welding platform, 4.6 Lower spot welding head, 4.7 Anti-vibration washer, 4.8 Bolt spring. Detailed Implementation

[0039] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0040] Example 1: As Figures 1-7 As shown, a novel integrated spot welding and stamping alloy plate connecting device consists of four parts: frame unit 1, jet unit 2, electromagnetic catapult unit 3, and composite connecting unit 4.

[0041] The rack unit 1 features include: upper step hole 1.1, side hole 1.2, lower step hole 1.3, square hole 1.4, sliding slot 1.5, gear shaft hole 1.6;

[0042] The rack unit 1 is first formed by casting into two parts, and connected by welding; the upper step hole 1.1 penetrates the upper part of the rack unit 1 along the z-axis direction, used for installing the jet unit 2; the four side holes 1.2 are through holes, evenly distributed on the four sides of the rack unit 1, the lower step hole 1.3 penetrates the lower part of the rack unit 1 along the z-axis direction, located in the negative direction of the z-axis of the upper step hole 1.1, and coaxially arranged with the upper step hole 1.1, used for installing the electromagnetic ejection unit 3, the lower step hole 1.3 is provided with a stepped sliding slot 1.5 on both sides, which is parallel to the axis direction of the lower step hole 1.3, one side of the rack is provided with a square hole 1.4, and the other side is provided with a gear shaft hole 1.6, both of which are communicated with the sliding slot 1.5 at the rear of the rack unit 1;

[0043] The jet unit 2 includes a support seat 2.1, an upper die 2.2, a rubber sleeve 2.3, an upper spot welding platform 2.4, an exhaust groove 2.4.1, a boss 2.4.2, a cavity 2.4.3, an upper spot welding head 2.5, a gas conduit 2.6, and a gas tank 2.7;

[0044] When the jet unit 2 works, the alloy sheet is placed in the negative direction of the z-axis of the upper spot welding platform 2.4, and the upper surface thereof is in contact with the lower surface of the upper spot welding platform 2.4; the gas is first output from the gas tank 2.7, input into the support seat 2.1 through the gas conduit 2.6, and then sprayed from the support seat 2.1 to push the upper die 2.2, under the limiting action of the cavity 2.4.3, the upper die 2.2 moves 0.5 mm in the negative direction of the z-axis, then the gas flows along the inner wall of the upper spot welding platform 2.3 in the negative direction of the z-axis and is finally sprayed from the exhaust groove 2.4.1, thereby realizing the action of cooling the upper die 2.3 once and assisting in spraying the alloy sheet;

[0045] The upper die 2.2 is located in the cavity formed by the cooperation of the support seat 2.1 and the upper spot welding platform 2.4, and is in large gap cooperation with the cavity 2.4.3, the side wall of the cavity 2.4.3 has an inclination angle of 20°, the inner wall of the upper spot welding platform 2.4 is evenly distributed with four exhaust grooves 2.4.1 near the bottom surface, which ensures that the gas can cool the upper die 2.2 smoothly and be sprayed from the exhaust groove 2.4.1 at the same time, assisting the alloy sheet in demolding, the diameter of the rubber sleeve 2.3 is slightly larger than the through hole of the support seat 2.1, so that it can be embedded in the through hole of the support seat 2.1 after the punch 3.2 is stamped, ensuring the stability of the upper die 2.2;

[0046] The electromagnetic ejection unit 3 includes a guide rail 3.1, a punch 3.2, a coil winding 3.3, a buffer spring 3.4, a base 3.5, and a fixed disc 3.6;

[0047] The guide rail 3.1 is located in the lower stepped hole 1.3, coaxially arranged with the lower stepped hole 1.3, the base 3.5 is located in the negative direction of the z-axis of the guide rail 3.1, the lower part of the guide rail 3.1 is connected with the base 3.5 and the bottom surface of the rack unit 1 through bolts, the upper part is provided with a fixed disc 3.6, the fixed disc 3.6 is connected with the stepped surface of the lower step 1.3 through screws, which plays a role in stabilizing the guide rail 3.1, the coil winding 3.3 is arranged between the fixed disc 3.6 and the guide rail 3.1, when it passes through the current and generates a magnetic field, the punch 3.2 in the guide rail 3.1 moves along the positive direction of the z-axis under the action of electromagnetic force and presses the alloy sheet into the upper die 2.2 to realize the stamping of the alloy sheet, after the stamping is completed, the punch 3.2 falls under the action of gravity, and a stamping action is completed;

[0048] The stamping action of the punch 3.2 is powered by the coil winding 3.3, and the punch 3.2 falls under the action of its own gravity after stamping, eliminating the manual falling operation, realizing the traditional stamping action and improving the stamping efficiency, in addition, the punch 3.2 stays in the guide rail 3.1 after the stamping is completed, which ensures that it will not be separated from the guide rail 3.1, and the surface is stepped, which reduces the contact area between the outer surface and the inside of the guide rail 3.1, and reduces the resistance in the movement process of the punch 3.2;

[0049] The composite connecting unit 4 includes a motor 4.1, a gear shaft 4.2, a gear 4.3, a platform support 4.4, a rack 4.4.1, a sliding block 4.4.2, a lower spot welding platform 4.5, a lower spot welding head 4.6, a shock pad 4.7, and a bolt spring 4.8;

[0050] The motor 4.1 is installed in the square hole 1.4 on the side of the rack, connected with the rack unit 1 through welding, which drives the gear 4.3 to rotate through the gear shaft 4.2, providing power for the composite connecting unit 4; the rightmost side of the platform support 4.4 is designed with a rack 4.4.1, which cooperates with the gear 4.3 to drive the composite connecting unit 4 to move up and down, and the two sides are designed with sliding blocks 4.4.2, which cooperate with the sliding grooves 1.5 to ensure the stability of the movement of the composite connecting unit 4, when the motor 4.1 rotates forward, the lower spot welding platform 4.5 rises and approaches the upper spot welding platform 2.4, at the same time, the sheet placed in the positive direction of the z-axis is clamped and spot welded by the upper spot welding head 2.5 and the lower spot welding head 4.6, when the motor 4.1 reverses, the two spot welding platforms are separated at the same time, and the alloy sheet is demolded, completing a spot welding action;

[0051] The bolt spring 4.8 is located between the lower spot welding platform 4.5 and the platform support 4.4, which can press the alloy sheet tightly to assist the stamping connection when the upper spot welding platform 2.4 and the lower spot welding platform 4.5 are folded;

[0052] The shockproof washer 4.7 is made of rubber and is installed in the stepped hole of the lower spot welding platform 4.5 in a small interference fit, and serves as a buffer protection device when the upper spot welding platform 2.4 and the lower spot welding platform 4.5 are folded and pressed against the sheet metal;

[0053] The platform support 4.4 is designed with a sliding block structure at both ends along the x direction and is matched with a sliding groove 1.5 in a small gap, which ensures the stability of the up-and-down movement, and is provided with a through hole in the middle for passing through a punch, and four lower spot welding heads 4.6 are coaxially arranged with four upper spot welding heads 2.5, which ensures the quality of the welded joint;

[0054] The lower spot welding head 4.6 is matched with the lower spot welding platform 4.5 in a small gap screw connection, which is convenient for replacing the worn welding head, and when it is installed in the lower spot welding platform 4.5, it needs to protrude 0.5 mm along the positive direction of the z axis, which ensures that it is in full contact with the alloy sheet during work.

[0055] Example 2: The working process of a new type of integrated spot welding and imprinting alloy sheet connecting device is as shown in Figure 8 .

Claims

1. A novel alloy sheet joining device integrating spot welding and embossing, characterized in that, It includes a frame unit (1), a jet unit (2), an electromagnetic catapult unit (3), and a composite connection unit (4); The frame unit (1) includes an upper stepped hole (1.1), a side hole (1.2), a lower stepped hole (1.3), a square hole (1.4), a slide groove (1.5), and a gear shaft hole (1.6); The upper stepped hole (1.1) penetrates the upper part of the frame unit (1) along the z-axis direction; the side hole (1.2) is a through hole and is provided in four places, evenly distributed on the four sides of the frame unit (1); the lower stepped hole (1.3) penetrates the lower part of the frame unit (1) along the z-axis direction, is located in the negative z-axis direction of the upper stepped hole (1.1), and is coaxial with the upper stepped hole (1.1); the slide groove (1.5) is provided on both sides of the lower stepped hole (1.3), and is parallel to the axis of the lower stepped hole (1.3); the square hole (1.4) and the gear shaft hole (1.6) are located on both sides of the frame unit (1), and both are connected to the slide groove (1.5); The jet unit includes a support base (2.1), an upper mold (2.2), a rubber sleeve (2.3), an upper spot welding platform (2.4), an exhaust groove (2.4.1), a boss (2.4.2), a cavity (2.4.3), an upper spot welding head (2.5), a gas duct (2.6), and a gas box (2.7). The gas conduit (2.6) is connected at both ends to the support base (2.1) and the gas box (2.7); the support base (2.1) is located in the negative z-axis direction of the upper stepped hole (1.1) and is coaxial with the upper stepped hole (1.1), and is connected to the upper stepped hole (1.1) by a threaded connection; the upper mold (2.2) is located in the negative z-axis direction of the support base (2.1) and is coaxial with it, and the two are connected by a rubber sleeve (2.3), which is fixed to the top of the upper mold (2.2) by screws; the upper spot welding heads (2.5) are evenly distributed in the four holes of the upper spot welding platform (2.4); the boss (2.4.2) is provided in four places, evenly distributed at 90° on the lower surface of the upper spot welding platform (2.4), and the cavity (2.4.3) is located in the center of the boss; the exhaust groove (2.4.1) is evenly distributed at 90° on the inner wall of the cavity (2.4.3); The electromagnetic catapult unit (3) includes a guide rail (3.1), a punch (3.2), a coil winding (3.3), a buffer spring (3.4), a base (3.5), and a fixing plate (3.6); The guide rail (3.1) is installed in the lower stepped hole (1.3), and the punch (3.2) is coaxially arranged inside. The base (3.5) is located in the negative z-axis direction of the guide rail (3.1). The lower part of the guide rail (3.1), the base (3.5) and the bottom surface of the frame unit (1) are connected by bolts. The upper part of the guide rail (3.1) is fitted with a fixing plate (3.6), which is a clearance fit with the guide rail (3.1). The fixing plate (3.6) is connected to the stepped surface of the lower stepped hole (1.3) by screws. The coil winding (3.3) is arranged between the fixing plate (3.6) and the guide rail (3.1). The buffer spring (3.4) is arranged in the negative z-axis direction of the punch (3.2) and is connected to the middle of the top surface of the base (3.5) by welding. The composite connection unit (4) includes a motor (4.1), a gear shaft (4.2), a gear (4.3), a platform support (4.4), a rack (4.4.1), a slider (4.4.2), a lower spot welding platform (4.5), a lower spot welding head (4.6), a shock-absorbing washer (4.7), and a bolt spring (4.8). The motor (4.1) is installed in the square hole (1.4) and connected to the frame unit (1) by welding. The gear (4.2) is driven to rotate by the gear shaft (4.2) installed in the gear shaft hole (1.6). The platform support (4.4) is designed with a rack (4.4.1) on one side along the negative x-axis, which meshes with the gear (4.3) for transmission. The sliders (4.4.2) on both sides of the platform support (4.4) along the x-axis cooperate with the slide grooves (1.5). The lower spot welding platform (4.5) is connected to the platform support (4.4), and the bolt spring (4.8) is located between the lower spot welding platform (4.5) and the platform support (4.4). The lower spot welding platform (4.5) is located in the lower stepped hole (1.3) and is set in the positive z-axis direction of the platform support (4.4) by bolt connection. Four threaded holes are evenly distributed on the periphery for installing the lower spot welding head (4.6). The four lower spot welding heads (4.6) correspond one-to-one with the four upper spot welding heads (2.5) and are evenly distributed along the z-axis at 90°.

2. The novel integrated spot welding and embossing alloy plate connecting device according to claim 1, characterized in that, The shock-absorbing washer (4.7) is made of rubber and is installed in the stepped hole of the lower spot welding platform (4.5) with an interference fit.

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