Rim pulse hot-pressing precision welding device

Abstract

This invention discloses a precision welding device for steel ring pulse hot pressing. This application utilizes a bidirectional motor to drive forward and reverse fine-pitch screws, in conjunction with first and second nut seats and a crossbeam, to achieve synchronous approach or distance of the two support blocks, ensuring balanced force during steel ring welding. Furthermore, the lever amplification effect of the elbow mechanism converts the motor's driving force into the enormous pressure required for upsetting. Simultaneously, the self-locking characteristic of the elbow mechanism at its limit position allows for maintaining constant pressure during the upsetting holding stage without continuous torque from the motor, effectively preventing displacement caused by vibration or reaction forces during welding and ensuring the tightness and strength of the welded joint. In addition, the combination of a four-stage pulse hot pressing process—preheating, flashing, upsetting, and resting—achieves high precision, high strength, and high stability in steel ring welding.

Description

Technical Field

[0001] This invention relates to the field of welding technology, and more particularly to a precision welding apparatus for steel ring pulse hot pressing. Background Technology

[0002] In the butt welding stage after the wheel rim is rolled and formed, the pulse hot pressing precision welding of the steel rim has the advantages of extremely high welding quality, joint performance close to the base material, small heat-affected zone, and high efficiency. It is suitable for mass production with extremely high requirements for strength and density.

[0003] This welding technology utilizes a clamping structure to press and bring the two sides of the steel rim welding area close together during operation. Current is then applied, and a high resistance is used to heat the interface until it is red-hot. Finally, the joint is connected by compression and allowed to cool. During this process, the ends of the rim need to contact and separate multiple times, and a significant force is required at the tail section to press the ends together. Currently, the market often uses a screw mechanism to drive the contact and separation. While hydraulic systems have precision issues, screw mechanisms have poor load-bearing capacity. Furthermore, due to the small separation distance, using a large-size screw while maintaining precision requires a specially designed screw, significantly increasing costs. Small-size screws often cannot provide the final upsetting pressure, and the upsetting process requires a holding period. Directly applying force with a screw would significantly increase screw wear. Therefore, existing technologies cannot achieve a comprehensive and satisfactory solution. Summary of the Invention

[0004] In view of the problems mentioned in the background art, the technical problem to be solved by the present invention is to provide a precision welding device for steel ring pulse hot pressing.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: A precision welding device for steel ring pulse hot pressing, comprising, The machine base is equipped with a mounting frame; The support block consists of two blocks, left and right, which are slidably mounted on the machine platform in a left-right direction. It is used to support the steel ring to be welded. The pressure block includes two left and right blocks, which are respectively set on two support blocks by a lifting drive device. The pressure block moves with the two support blocks and is driven to rise and fall by the lifting drive device. It is used to press the steel ring to be welded onto the support blocks. A drive unit, comprising a power source for driving two support blocks toward or away from each other; The control box is used to supply power to form a circuit with the two support blocks and the steel ring; Welding includes the following four stages: Preheating stage: Push the workpiece to make slight contact with the end face of the stationary workpiece, pause briefly after contact, and then quickly pull it away a short distance. During this stage, heat is generated by using a low current and the contact resistance. Flashing stage: After the preheating is completed, it continues to move forward at a stable speed, and maintains a very small and constant gap between the two ends. Micro-pulse regulation is used in this stage to stabilize the output current. Upsetting stage: At the moment the flashing stage ends, the electrode will suddenly advance at an extremely high speed and with great pressure, squeezing the two workpieces together. At the moment the squeezing begins, the current usually remains or reaches its peak value. When the upsetting action is completed or about to be completed, the current is immediately cut off to prevent the joint from overheating. Resting phase: Keep the welded joint in the upsetting position and continue to apply pressure to allow it to cool and crystallize under pressure. There is zero current throughout this phase.

[0006] Preferably, the drive device includes: A bidirectional motor, which serves as a power source; The lead screw mechanism includes a screw with forward and reverse threads, a first nut seat and a second nut seat. The screw is connected to a bidirectional motor drive. The two nut seats are respectively threaded to the two forward and reverse threaded sections of the screw. The first nut seat is provided with a first crossbeam that abuts against the side wall of the machine base, and the second nut seat is provided with a second crossbeam that abuts against the side wall of the machine base. The elbow mechanism, which is mounted on the mounting bracket, includes four elbows. The two inner elbows are a group and are pushed away from each other by pushing the two support blocks upward through the second crossbeam. The two outer elbows are a group and are pushed closer to each other by pushing the two support blocks upward through the first crossbeam. The thread parameters of the first nut seat and the second nut seat are the same, so that the two nut seats move closer or further away synchronously.

[0007] Preferably, the elbow mechanism includes: The fixed frame includes a base plate, a vertical plate disposed at one end of the base plate and perpendicular to the base plate, and a hinge seat disposed at the other end of the base plate. The vertical plate has a notch in the middle and transverse extensions on the vertical plates on both sides of the notch. The first lever arm is hinged to the transverse extension plate. It has a movable end on one side of the hinge point and the movable end is used to apply force to the crossbeam. The length from the movable end to the hinge point of the first lever arm is greater than the length from the hinge point of the first lever arm to the other end of the first lever arm. The articulated arm is hinged to the articulated base and has a transverse extension plate fixed to its side. When the articulated arm is perpendicular to the base plate, the transverse extension plate and the transverse extension are on the same straight line. The second lever arm has its two ends hinged to the transverse extension plate and the first lever arm, respectively. When the first lever arm swings to its limit position, the first lever arm, the second lever arm, and the transverse extension plate are in the same straight line and are locked by a locking structure. The support block is provided with a boss, and the side wall of the hinge arm abuts against the two bosses. The crossbeam acts on the movable end of the first lever arm. When the first lever arm is pushed up, the corresponding hinge arm swings and pushes the boss to slide.

[0008] Preferably, the locking structure includes an arc surface on one side of the bottom surface of the hinge arm and a flat surface on the other side of the bottom surface of the hinge arm. When the hinge arm rotates to be perpendicular to the base plate, the flat surface abuts against the base plate and locks the hinge arm in place. Alternatively, the locking structure is a locking block on the base plate. When the hinge arm rotates to be perpendicular to the base plate, it abuts against the locking block and locks the hinge arm in place. Or, the locking structure is a stop bar at the notch. When the hinge arm rotates to be perpendicular to the base plate, the first lever arm abuts against the stop bar and locks the hinge arm in place.

[0009] Preferably, the drive motor is a high-inertia AC servo motor with electromagnetic brake or a frameless torque motor driven by a servo driver.

[0010] Preferably, the support block has an upper and lower separation structure, with the upper and lower parts of the support block being slidably connected and equipped with a spring. When pressed down, the upper and lower parts form a floating buffer.

[0011] Preferably, the pressure block has a D-shaped structure with its arc-shaped wall facing to the left or right to match the inner diameter of the steel ring for support. Two rectangular blocks are provided on the bottom inner side to press the two sides of the welding area together. Two cylindrical support platforms are provided on both sides of the support block to support the steel ring.

[0012] Preferably, the machine includes a front support platform and a rear support platform, each of which is provided with a track. The two support platforms are slidably mounted on the two tracks by a slider. The mounting bracket is fixed between the front support platform and the rear support platform to hide the drive device inside.

[0013] Preferably, the lifting drive device includes multiple guide columns set on the support block, the pressure block is slidably connected to the guide columns, and a hydraulic cylinder is provided between the support block and the pressure block to drive the pressure block to move downward by pressing down.

[0014] Compared with the prior art, the present invention has the following advantages: This application uses a bidirectional motor to drive a fine-pitch screw with forward and reverse directions, in conjunction with the first and second nut seats and the crossbeam, to achieve synchronous approach or distance of the two support blocks, ensuring balanced force during steel ring welding; on this basis, the lever amplification effect of the elbow mechanism transforms the driving force of the motor into the huge pressure required for upsetting, while utilizing the self-locking characteristic of the elbow mechanism at the limit position, so that constant pressure can be maintained without the motor continuously providing torque during the upsetting pressure holding stage, effectively preventing displacement caused by vibration or reaction force during welding, and ensuring the tightness and strength of the welded joint; in addition, by combining the four-stage pulse hot pressing process of preheating, flashing, upsetting, and rest, high precision, high strength and high stability of steel ring welding are achieved. Attached Figure Description

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be regarded as a limitation on the scope of the present invention. In addition, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0016] Figure 1 This is a perspective view (front view) of this application; Figure 2 This is a perspective view (compressed portion) of this application; Figure 3 This is a perspective view (back side) of this application; Figure 4 A 3D view of the lifting drive device; Figure 5 A 3D view of the drive unit; Figure 6 for Figure 5 Enlarged view of point A in the middle; In the diagram: 01, steel ring; 10, machine base; 101, front support platform; 102, rear support platform; 103, mounting bracket; 20, pressure block; 201, D-shaped structure; 202, rectangular block; 30, support block; 300, boss; 301, track; 302, support platform; 40, lifting drive device; 401, guide column; 402, hydraulic cylinder; 50, drive device; 501; 5011, toggle mechanism; 50111 50112. Base plate; 50112. Vertical plate; 501121. Stop bar; 50113. First lever arm; 501131. Lateral extension; 50114. Hinge seat; 50115. Hinge arm; 50116. Lateral extension plate; 50117. Second lever arm; 502. Lead screw mechanism; 5020. Screw; 5021. First nut seat; 5022. Second nut seat; 503. First crossbeam; 504. Second crossbeam. Detailed Implementation

[0017] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0018] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures. Example

[0019] This embodiment mainly describes the title of the steel ring pulse hot pressing precision welding device, as follows: Steel ring 01 pulse hot pressing precision welding device, such as Figure 1As shown, the system includes: a machine base 10 with a mounting bracket 103; support blocks 30, comprising two blocks (left and right) that slide laterally on the machine base 10, used to support the steel ring 01 to be welded; pressure blocks 20, comprising two blocks (left and right) that are respectively mounted on the two support blocks 30 via a lifting drive device 40, moving with the two support blocks 30 while being driven to rise and fall by the lifting drive device 40, used to press the steel ring 01 to be welded onto the support blocks 30; a drive device 50, including a power source, used to drive the two support blocks 30 closer to or further away from each other; and a control box, used to supply power to form a circuit with the two support blocks 30 and the steel ring 01 (the control box is not shown in the figure). The welding process includes the following four stages: preheating stage: pushing the workpiece to make slight contact with the end face of a stationary workpiece, pausing briefly after contact, and then quickly pulling away a small distance; this stage uses a low current to generate heat through contact resistance; flashing stage: after preheating, continuously moving the workpiece at a stable speed towards the support blocks 30. The process begins with the electrode advancing forward, maintaining a very small, constant gap between the two end faces. During this stage, micro-pulse adjustment is used to stabilize the output current. During this process, resistance changes due to point contact and flash burning of contact points cause current variations. The control box then rapidly adjusts the current based on these characteristics. For example, when resistance increases, the current decreases, so the current is increased to stabilize it; conversely, when the current increases, the current is decreased to maintain a stable position. This microscopically creates a pulse-like current adjustment, but macroscopically the current remains stable. The upsetting stage: At the moment the flashing stage ends, the electrode is suddenly pushed forward at extremely high speed and pressure, squeezing the two workpieces together. At the moment the squeezing begins, the current usually remains at or reaches its peak. When the upsetting action is completed or about to be completed, the current is immediately cut off to prevent the joint from overheating. The resting stage: The electrode remains stationary in the upsetting position, continuously applying pressure to allow the welded joint to initially cool and crystallize under pressure. Zero current is present throughout this stage. This solution uses the machine base 10 and the mounting frame 103 to form a stable bearing foundation. The support block 30 lifts and positions the steel ring 01, the pressure block 20 cooperates to complete the clamping and limiting, the drive device 50 regulates the distance between the two workpieces, and the control box constructs the power circuit. In the preheating stage, the end face is cleaned by low current contact heating. In the flashing stage, stable discharge is maintained by pulse current. In the upsetting stage, impurities are removed by high-speed and high-pressure extrusion and metal atomic bonding is achieved. In the resting stage, pressure holding and cooling ensure the dense formation of the weld. The various stages work together to achieve high-precision and high-strength welding of the steel ring 01.

[0020] like Figure 3-5The drive device 50 includes: a bidirectional motor as a power source; a lead screw mechanism 502, which includes a screw 5020 with forward and reverse threads, a first nut seat 5021 and a second nut seat 5022, the screw 5020 being drivenly connected to the bidirectional motor, the two nut seats being threadedly connected to the two forward and reverse threaded sections of the screw 5020 respectively, the first nut seat 5021 being provided with a first crossbeam 503 abutting against the side wall of the machine base 10, and the second nut seat 5022 being provided with a second crossbeam 504 abutting against the side wall of the machine base 10; and an elbow mechanism 5011, which is mounted on the mounting frame 103, including four elbows, the two inner ones forming a group and pushing the two support blocks 30 away by pushing them upward through the second crossbeam 504, the two outer ones forming a group and pushing the two support blocks 30 closer by pushing them upward through the first crossbeam 503, the thread parameters of the first nut seat 5021 and the second nut seat 5022 being the same, so that the two nut seats move closer or further away synchronously. A bidirectional motor drives the lead screw mechanism 502, which in turn drives the two nut seats to move synchronously through the forward and reverse threaded screws 5020, ensuring the consistency of the movement of the crossbeams on both sides. This, in turn, causes the elbow mechanism 5011 to push the support block 30 synchronously, achieving balanced force on both ends of the steel ring 01, avoiding uneven load, and reducing the number of power sources, thus lowering equipment costs and control complexity. In addition, by utilizing the self-locking characteristics and force amplification effect of the elbow, the force on the screw 5020 is reduced, protecting the screw 5020. Furthermore, since the elbow mechanism 5011 can amplify the force, a more precise fine-pitch screw can be used.

[0021] like Figure 5-6As shown, the elbow mechanism 5011 includes: a fixed frame, which includes a base plate 50111, a vertical plate 50112 disposed at one end of the base plate 50111 and perpendicular to the base plate 50111, and a hinge seat 50114 disposed at the other end of the base plate 50111. The vertical plate 50112 has a notch in the middle and transverse extensions 501131 on both sides of the notch; a first lever arm 50113, which is hinged to the transverse extension 501131. One side of the hinge point has a movable end, which is used to apply force to the crossbeam. The length from the movable end to the hinge point of the first lever arm 50113 is greater than the length from the hinge point of the first lever arm 50113 to the other end of the first lever arm 50113; and a hinge arm 50115, which is hinged to the hinge seat 50114 and has a horizontal extension fixed to its side. When the hinge arm 50115 is perpendicular to the base plate 50111, the transverse extension plate 50116 and the transverse extension part 501131 are on the same straight line; the second lever arm 50117 is hinged at both ends to the transverse extension plate 50116 and the first lever arm 50113 respectively. When the first lever arm 50113 swings to the limit position, the first lever arm 50113, the second lever arm 50117 and the transverse extension plate 50116 are on the same straight line and are locked by the locking structure; the support block 30 is provided with a boss 300, the side wall of the hinge arm 50115 abuts against the two bosses 300, the crossbeam acts on the movable end of the first lever arm 50113, when the first lever arm 50113 is pushed up, the corresponding hinge arm 50115 swings and pushes the boss 300 to slide. This scheme describes the specific structure of the elbow mechanism 5011. It uses the first lever arm 50113, the second lever arm 50117, and the hinged arm 50115 to form a lever-amplifying structure, amplifying the thrust of the crossbeam and providing stable thrust to the support block 30. Simultaneously, the locking structure fixes the mechanism's shape at its limit position, preventing displacement due to welding vibration and ensuring the positional stability of the steel ring 01 during welding, especially during the final upsetting holding stage. It should be noted that the initial contact separations all reach the limit position, with the limit position only reached at the final top. For example... Figure 5 As shown, the hinged arms 50115 on both sides of the same boss 300 simultaneously abut against each other. Because they are mounted on different crossbeams, their forward and backward movement during operation precisely limits and pushes the boss 300; the inner arm pushes outward, and the outer arm pushes inward. Preferably, guide posts can be provided on the two crossbeams for guidance. Furthermore, the limit position of the elbow mechanism 5011 is only used in the final upsetting stage; the limit position is not reached in the earlier contact stage.

[0022] like Figure 6As shown, the locking structure includes an arc surface on one side of the bottom surface of the hinge arm 50115 and a flat surface on the other side of the bottom surface of the hinge arm 50115. When the hinge arm 50115 rotates to be perpendicular to the base plate 50111, the flat surface abuts against the base plate 50111 and locks the hinge arm; or the locking structure is a locking block on the base plate 50111. When the hinge arm 50115 rotates to be perpendicular to the base plate 50111, it abuts against the locking block and locks the hinge arm; or the locking structure is a stop bar 501121 at the notch. When the hinge arm 50115 rotates to be perpendicular to the base plate 50111, the first lever arm 50113 abuts against the stop bar 501121 and locks the hinge arm. This solution provides three locking structures, which respectively form a mechanical self-locking when the articulated arm 50115 is perpendicular by abutting the plane against the base plate 50111, limiting the locking block, or blocking the stop bar 501121. This ensures that the elbow mechanism 5011 does not deform or retract under the high pressure of upsetting, and maintains a constant welding extrusion pressure on the steel ring 01.

[0023] Preferably, the drive motor is a high-inertia AC servo motor with an electromagnetic brake or a frameless torque motor driven by a servo driver. This design is primarily intended to ensure stable forward switching of the structure. The servo motor or frameless torque motor can precisely control the speed and angle, achieving accurate adjustment of the moving speed and position of the support block 30. The electromagnetic brake can lock the motor shaft during power outages or pressure holding to prevent the steel ring 01 from shifting position, ensuring the stability of the welding process.

[0024] Preferably, the support block 30 has a separate upper and lower structure, with the upper and lower parts of the support block 30 slidably connected and equipped with a spring. When pressed down, the upper and lower parts form a floating buffer. This solution uses the elastic deformation of the spring to allow the upper part of the support block 30 to float relative to the lower part, avoiding excessive clamping force of the pressure block 20 on the steel ring 01 during upsetting, which could cause workpiece deformation. At the same time, it absorbs welding vibration and protects the structural integrity of the steel ring 01.

[0025] like Figure 2 As shown, the pressure block 20 has a D-shaped structure 201 with its curved wall facing to the left or right to match the inner diameter of the steel ring 01 for support. Two rectangular blocks 202 are located on its inner bottom to press the welding area firmly on both sides. The support block 30 has two cylindrical support platforms 302 on both sides to support the steel ring 01. The curved wall of the D-shaped pressure block 20 conforms to the inner diameter of the steel ring 01 to prevent circumferential slippage, the rectangular blocks 202 precisely press the welding area, and the support platforms 302 provide stable axial support to prevent the steel ring 01 from sagging and ensure the accuracy of the welding position.

[0026] like Figure 4As shown, the machine base 10 includes a front support platform 101 and a rear support platform 102. Each of the two support platforms is provided with a track 301. The two support platforms are slidably mounted on the two tracks 301 by a slider. The mounting bracket 103 is fixed between the front support platform 101 and the rear support platform 102 to hide the drive device 50 inside.

[0027] like Figure 4 As shown, the lifting drive device 40 includes multiple guide columns 401 mounted on the support block 30. The pressure block 20 is slidably connected to the guide columns 401. A hydraulic cylinder 402 is provided between the support block 30 and the pressure block 20, which moves the pressure block 20 downward by pressing down. The two hydraulic cylinders 402 are synchronized by synchronous drive.

[0028] If special explanation is required, the technology involved in this application is flash welding. Although the name contains "pulse," it is not pulse welding. "Pulse" mainly refers to the pulsed adjustment of the current, which has been explained above.

[0029] In the description of this invention, it should be noted that the terms "upper," "lower," "front," "rear," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed when in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

Claims

1. A precision welding device for steel ring pulse hot pressing, characterized in that, include, The machine base is equipped with a mounting frame; The support block consists of two blocks, left and right, which are slidably mounted on the machine platform in a left-right direction. It is used to support the steel ring to be welded. The pressure block includes two left and right blocks, which are respectively set on two support blocks by a lifting drive device. The pressure block moves with the two support blocks and is driven to rise and fall by the lifting drive device. It is used to press the steel ring to be welded onto the support blocks. A drive unit, comprising a power source for driving two support blocks toward or away from each other; The control box is used to supply power to form a circuit with the two support blocks and the steel ring; Welding includes the following four stages: Preheating stage: Push the workpiece to make slight contact with the end face of the stationary workpiece, pause briefly after contact, and then quickly pull it away a short distance. During this stage, heat is generated by using a low current and the contact resistance. Flashing stage: After the preheating is completed, it continues to move forward at a stable speed, and maintains a very small and constant gap between the two ends. Micro-pulse regulation is used in this stage to stabilize the output current. Upsetting stage: At the moment the flashing stage ends, the electrode will suddenly advance at an extremely high speed and with great pressure, squeezing the two workpieces together. At the moment the squeezing begins, the current usually remains or reaches its peak value. When the upsetting action is completed or about to be completed, the current is immediately cut off to prevent the joint from overheating. Resting phase: Keep the welded joint in the upsetting position and continue to apply pressure to allow it to cool and crystallize under pressure. There is zero current throughout this phase.

2. The steel ring pulse hot pressing precision welding device according to claim 1, characterized in that, The drive unit includes: A bidirectional motor, which serves as a power source; The lead screw mechanism includes a screw with forward and reverse threads, a first nut seat and a second nut seat. The screw is connected to a bidirectional motor drive. The two nut seats are respectively threaded to the two forward and reverse threaded sections of the screw. The first nut seat is provided with a first crossbeam that abuts against the side wall of the machine base, and the second nut seat is provided with a second crossbeam that abuts against the side wall of the machine base. The elbow mechanism, which is mounted on the mounting bracket, includes four elbows. The two inner elbows are a group and are pushed away from each other by pushing the two support blocks upward through the second crossbeam. The two outer elbows are a group and are pushed closer to each other by pushing the two support blocks upward through the first crossbeam. The thread parameters of the first nut seat and the second nut seat are the same, so that the two nut seats move closer or further away synchronously.

3. The steel ring pulse hot pressing precision welding device according to claim 2, characterized in that, The toggle mechanism includes: The fixed frame includes a base plate, a vertical plate disposed at one end of the base plate and perpendicular to the base plate, and a hinge seat disposed at the other end of the base plate. The vertical plate has a notch in the middle and transverse extensions on the vertical plates on both sides of the notch. The first lever arm is hinged to the transverse extension plate. It has a movable end on one side of the hinge point and the movable end is used to apply force to the crossbeam. The length from the movable end to the hinge point of the first lever arm is greater than the length from the hinge point of the first lever arm to the other end of the first lever arm. The articulated arm is hinged to the articulated base and has a transverse extension plate fixed to its side. When the articulated arm is perpendicular to the base plate, the transverse extension plate and the transverse extension are on the same straight line. The second lever arm has its two ends hinged to the transverse extension plate and the first lever arm, respectively. When the first lever arm swings to its limit position, the first lever arm, the second lever arm, and the transverse extension plate are in the same straight line and are locked by a locking structure. The support block is provided with a boss, and the side wall of the hinge arm abuts against the two bosses. The crossbeam acts on the movable end of the first lever arm. When the first lever arm is pushed up, the corresponding hinge arm swings and pushes the boss to slide.

4. The steel ring pulse hot pressing precision welding device according to claim 3, characterized in that, The locking structure includes an arc surface on one side of the bottom surface of the hinge arm and a flat surface on the other side of the bottom surface of the hinge arm. When the hinge arm rotates to be perpendicular to the base plate, the flat surface abuts against the base plate and locks the hinge arm in place. Alternatively, the locking structure is a locking block on the base plate. When the hinge arm rotates to be perpendicular to the base plate, it abuts against the locking block and locks the hinge arm in place. Or, the locking structure is a stop bar at the notch. When the hinge arm rotates to be perpendicular to the base plate, the first lever arm abuts against the stop bar and locks the hinge arm in place.

5. The steel ring pulse hot pressing precision welding device according to claim 2, characterized in that, The drive motor is a high-inertia AC servo motor with electromagnetic brake or a frameless torque motor driven by a servo driver.

6. The steel ring pulse hot pressing precision welding device according to claim 1, characterized in that, The support block has a separate upper and lower structure. The upper and lower parts of the support block are slidably connected and equipped with a spring. When it is pressed down, the upper and lower parts form a floating buffer.

7. The steel ring pulse hot pressing precision welding device according to claim 1, characterized in that, The pressure block has a D-shaped structure with its curved wall facing to the left or right to match the inner diameter of the steel ring for support. Two rectangular blocks are provided on the bottom inner side to press the two sides of the welding area together. Two cylindrical support platforms are provided on both sides of the support block to support the steel ring.

8. The steel ring pulse hot pressing precision welding device according to claim 1, characterized in that, The machine includes a front support platform and a rear support platform, each with a track. The two support platforms are slidably mounted on the two tracks by a slider. The mounting bracket is fixed between the front and rear support platforms to hide the drive unit inside.

9. The steel ring pulse hot pressing precision welding device according to claim 1, characterized in that, The lifting drive device includes multiple guide columns set on the support block, the pressure block is slidably connected to the guide columns, and a hydraulic cylinder is provided between the support block and the pressure block to drive the pressure block to move downward by pressing down.

Images