Resistance butt welding device and welding control method

Abstract

The invention provides a resistance butt welding device and a welding control method. The resistance butt welding device comprises a base, a transverse moving mechanism, a longitudinal adjusting mechanism and a vertical adjusting mechanism, and the transverse moving mechanism is installed on the base and is in transmission connection with a first clamp; the longitudinal adjusting mechanism and the vertical adjusting mechanism are in transmission connection, one of the longitudinal adjusting mechanism and the vertical adjusting mechanism is mounted on the base, and the other is in transmission connection with a second clamp; the second clamp and the first clamp are arranged in a spaced mode in the transverse direction and used for clamping a to-be-welded part. According to the resistance butt welding device, by adjusting and centering the welding end face of the to-be-welded part, sufficient diffusion and recrystallization of metal atoms of the to-be-welded part can be promoted, and the compactness of the welding end face and the uniformity of a welding seam are improved; the welding quality is improved; the transverse moving mechanism is arranged to drive the first clamp to clamp the to-be-welded part to move, so that the welding end faces are tightly attached, and the compactness and the welding strength of the welding end faces are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of butt welding machines, and more particularly, to a resistance butt welding device and a welding control method. Background Art

[0002] In recent years, due to its unique shape memory effect, superelasticity, biocompatibility, anti-damping performance, corrosion resistance, and comprehensive mechanical properties, nickel-titanium shape memory alloy (NiTi SMA) has been widely used in fields such as aerospace and medical devices. With the development of technology and the increasing application requirements, the combination of NiTi SMA with other materials has become increasingly important. Especially in the medical device field, the combination of NiTi SMA and stainless steel can produce products with better performance such as guidewires and composite orthodontic archwires. For example, in a guidewire combined with NiTi SMA and stainless steel, the proximal stainless steel part has good support and is easy to push, while the distal NiTi SMA part has good compliance and is easy to travel in tortuous blood vessels. However, the welding technology of NiTi SMA and stainless steel faces many challenges. During the welding process, suppressing the formation of intermetallic compounds is the key to successful welding because these compounds may cause brittle phases at the interface of the weld area, increasing the risk of fracture during clinical use. In the field of dissimilar material welding technology, resistance welding, as a solid-phase welding technology, shows potential in the connection of NiTi SMA and dissimilar materials because of its short welding time and the non-melting of the joined metals, which greatly limits the generation of intermetallic compounds at the interface of the welded joint. However, the resistance butt welding device in the prior art cannot guarantee the quality of the welded joint, and there are still the following deficiencies. Before resistance butt welding, the workpieces to be welded cannot be adjusted for centering, resulting in poor welding quality. Summary of the Invention

[0003] The present invention provides a resistance butt welding device to solve the technical problem that in the existing resistance butt welding, the workpieces to be welded cannot be adjusted for centering, resulting in poor welding quality.

[0004] The present invention provides a resistance butt welding device, including a base, a lateral movement mechanism, a longitudinal adjustment mechanism, and a vertical adjustment mechanism. The lateral movement mechanism is installed on the base and is drivingly connected to a first clamp; the longitudinal adjustment mechanism and the vertical adjustment mechanism are drivingly connected, one of them is installed on the base, and the other is drivingly connected to a second clamp; the second clamp and the first clamp are arranged at intervals in the lateral direction and are respectively used for clamping the workpieces to be welded.

[0005] The longitudinal adjustment mechanism and the vertical adjustment mechanism are configured such that the longitudinal adjustment mechanism and the vertical adjustment mechanism are used to respectively drive the second clamp to move in the longitudinal direction and the vertical direction to center the welding end faces of the two workpieces to be welded.

[0006] The transverse movement mechanism is configured to drive the first fixture to move along the transverse direction so that the welding end faces of the two workpieces to be welded abut against each other.

[0007] Optionally, the resistance butt welding device further includes a first detection component and a second detection component. The detection directions of the first detection component and the second detection component are both perpendicular to the transverse direction and are set at a preset angle; the first detection component and the second detection component are configured to detect whether the welding end faces of the two workpieces to be welded are coaxial along the transverse direction and the distance therebetween along the transverse direction;

[0008] Alternatively, the resistance butt welding device further includes a third detection component and a fourth detection component. The detection direction of the third detection component is perpendicular to the transverse direction and is used to detect the distance between the welding end faces of the two workpieces to be welded along the transverse direction; the detection direction of the fourth detection component is parallel to the transverse direction and is used to detect whether the welding end faces of the two workpieces to be welded are coaxial along the transverse direction.

[0009] Optionally, the longitudinal adjustment mechanism includes a longitudinal driving component and a longitudinal moving seat. The longitudinal driving component is installed on the base and is drivingly connected to the longitudinal moving seat;

[0010] The vertical adjustment mechanism includes a vertical driving component and a vertical moving seat. The vertical driving component is installed on the longitudinal moving seat and is drivingly connected to the vertical moving seat;

[0011] The second fixture is fixedly arranged on the horizontal part of the vertical moving seat.

[0012] Optionally, the longitudinal adjustment mechanism further includes a guiding component. The guiding component includes a fixed guide rail, a movable guide rail and rollers arranged therebetween. The fixed guide rail is installed on the base, and the movable guide rail is fixedly arranged on the longitudinal moving seat; the guiding component is configured to enable the longitudinal moving seat to move relative to the base along the longitudinal direction.

[0013] Optionally, the longitudinal adjustment mechanism further includes a mounting seat. The mounting seat includes a bottom plate and a protruding part that are vertically connected. The bottom plate is fixedly arranged on the base, the guiding component is arranged on both sides of the protruding part, and the side surface of the fixed guide rail abuts against the side wall surface of the protruding part;

[0014] The longitudinal moving seat is a U-shaped longitudinal moving seat with its opening facing downward. The upper surface of the movable guide rail is fixedly arranged on the inner top wall surface of the U-shaped longitudinal moving seat, and the side surface of the movable guide rail abuts against the inner side wall surface of the U-shaped longitudinal moving seat.

[0015] Optionally, a first fixed block is fixedly arranged on the side of the mounting seat; the longitudinal drive assembly comprises a longitudinal movable block and a first adjusting screw, the longitudinal movable block is fixedly arranged on the longitudinal displacement seat; the middle portion of the first adjusting screw is threadedly connected to the first fixed block, and the power output end of the first adjusting screw abuts against the longitudinal movable block, so as to drive the longitudinal movable block to move along the longitudinal direction;

[0016] And / or, the longitudinal adjustment mechanism also includes a longitudinal locking assembly, which includes a longitudinal adjustment plate, a first locking screw and a first locking nut, the longitudinal adjustment plate is fixed to the side wall of the mounting seat, the longitudinal adjustment plate has a first strip through hole, the first strip through hole extends along the longitudinal direction, the first locking nut is fixed to the side wall of the longitudinal displacement seat, and the first locking screw passes through the first strip through hole and cooperates with the first locking nut.

[0017] Optionally, the vertical adjustment mechanism further includes a vertical guide rail, which is mounted on the longitudinal shift seat, and the vertical portion of the vertical shift seat is perpendicular to the horizontal portion of the vertical shift seat and is slidably connected to the vertical guide rail.

[0018] Optionally, the vertical shift seat is fixedly provided with a second fixed block; the vertical drive assembly comprises a second adjusting screw and a vertical movable block, the vertical movable block is fixedly provided on the lower surface of the horizontal portion of the vertical shift seat; the axis of the second adjusting screw extends along the longitudinal direction, the middle portion of the second adjusting screw is threadedly connected to the second fixed block, a transfer block is transmission-connected between the power output end of the second adjusting screw and the vertical movable block, the transfer block is used to convert the movement of the second adjusting screw along the longitudinal direction into the movement in the vertical direction to drive the vertical movable block to move along the vertical direction;

[0019] And / or, the vertical adjustment mechanism also includes a vertical locking assembly, which includes a vertical adjustment plate, a second locking screw and a second locking nut, the vertical adjustment plate is fixed to the side wall of the vertical guide rail, the vertical adjustment plate has a second strip through hole, the second strip through hole extends along the vertical direction, the second locking nut is fixed to the vertical part of the vertical displacement seat, and the second locking screw passes through the second strip through hole and cooperates with the second locking nut.

[0020] Optionally, the adapter block is a V-shaped block, the middle part of the V-shaped block is pivotally connected to the vertical guide rail, the opening of the V-shaped block faces downward, one end of the V-shaped block abuts against the power output end of the second adjusting screw, and the other end of the V-shaped block abuts against the vertical movable block;

[0021] Alternatively, the adapter block is a wedge-shaped block, a side surface of the wedge-shaped block is fixedly arranged on the power output end of the second adjusting screw, and an inclined surface of the wedge-shaped block abuts against and cooperates with an inclined surface of the vertical movable block.

[0022] Optionally, the transverse movement mechanism includes a transverse drive assembly, a transverse guide rail and a transverse seat, the transverse guide rail is installed on the base, the transverse drive assembly is installed on the base and is transmission-connected to the transverse seat, and is used to drive the transverse seat to move along the transverse direction to abut the welding end face of the part to be welded.

[0023] Optionally, the first clamp comprises a first support, a first clamping plate and a first electrode plate, the first support is fixedly arranged on the transverse seat; the first electrode plate is fixedly arranged on the first support, the first clamping plate and the first electrode plate are arranged opposite to each other along the vertical direction, and the first clamping plate is movably connected to the first support along the vertical direction; the workpiece to be welded is clamped between the first electrode plate and the first clamping plate;

[0024] The second clamp comprises a second support, a second clamping plate and a second electrode plate, the second support is fixedly arranged on the horizontal part of the vertical displacement seat, the second electrode plate is fixedly arranged on the second support, the second clamping plate and the second electrode plate are arranged opposite to each other along the vertical direction, and the second clamping plate is movably connected to the second support along the vertical direction; the other workpiece to be welded is clamped between the second electrode plate and the second clamping plate;

[0025] Wherein, the polarities of the first electrode plate and the second electrode plate are opposite.

[0026] Optionally, the first support has a first through hole, the first electrode plate is fixedly arranged in the first through hole and the lower surface of the first electrode plate abuts against the lower surface of the first through hole; the first support is threadedly connected with a first adjustment screw, the first adjustment screw penetrates into the first through hole and is fixedly arranged on the first clamping plate, and the first adjustment screw is used to drive the first clamping plate to move along the vertical direction to clamp the workpiece to be welded between the first clamping plate and the first electrode plate;

[0027] The second support has a second through hole, the second electrode plate is fixed in the second through hole and the lower surface of the second electrode plate abuts against the lower surface of the second through hole; the second support is threadedly connected with a second adjustment screw, the second adjustment screw passes through the second through hole and is fixed to the second clamping plate, and the second adjustment screw is used to drive the second clamping plate to move along the vertical direction to clamp the other part to be welded between the second clamping plate and the second electrode plate.

[0028] Optionally, the first through hole includes a first upper hole and a first lower hole that communicate with each other. The opening size of the first upper hole is smaller than the opening size of the first lower hole. The side wall surface of the first pressing plate is fitted to the side wall surface of the first upper hole, and the first electrode plate is fitted to the inner wall surface of the first lower hole;

[0029] The second through hole includes a second upper hole and a second lower hole that communicate with each other. The opening size of the second upper hole is smaller than the opening size of the second lower hole. The side wall surface of the second pressing plate is fitted to the side wall surface of the second upper hole, and the second electrode plate is fitted to the inner wall surface of the second lower hole.

[0030] A resistance butt welding control device provided by the present invention has at least the following beneficial technical effects:

[0031] (1) By setting a longitudinal adjustment mechanism and a vertical adjustment mechanism to drive the second fixture to hold the workpiece to be welded and move it to be centered with the welding end face of the workpiece to be welded held by the first fixture. On the one hand, it can promote the full diffusion and recrystallization between the metal atoms of the workpiece to be welded, improving the denseness of the welding end face and the uniformity of the weld seam; on the other hand, it can improve the welding quality, reduce secondary welding and waste;

[0032] (2) By setting a transverse movement mechanism to drive the first fixture to hold the workpiece to be welded and move it to abut against the welding end face of the workpiece to be welded held by the second fixture, so that the welding end faces of the two workpieces to be welded are closely attached. On the one hand, it makes the current evenly distributed, reduces the contact resistance fluctuation, ensures that the resistance heat is concentrated on the welding end face, thereby forming a uniform plastic deformation layer and recrystallized structure, significantly improving the denseness and welding strength of the welding end face; on the other hand, it can eliminate the microscopic gap of the welding end face, avoiding defects such as incomplete fusion or cracks on the welding end face.

[0033] The present invention also provides a resistance butt welding control method, which is applied to the above-mentioned resistance butt welding device. The control method includes:

[0034] Clamping: Clamp a workpiece to be welded with a preset length on the first fixture, and clamp another workpiece to be welded with a preset length on the second fixture;

[0035] Centering: Control the longitudinal adjustment mechanism and the vertical adjustment mechanism to drive the second fixture to move along the longitudinal direction and the vertical direction respectively so that the welding end faces of the two workpieces to be welded are coaxial along the transverse direction;

[0036] Abutting: Control the transverse movement mechanism to drive the first fixture to move along the transverse direction so that the welding end faces of the two workpieces to be welded abut;

[0037] Butt welding: Based on preset process parameters, butt weld the welding end faces of the two workpieces to be welded to obtain the welded workpiece.

[0038] Optionally, the resistance butt welding device includes a first detection component and a second detection component, and the detection directions of the first detection component and the second detection component are both perpendicular to the transverse direction and are arranged at a preset angle;

[0039] Between the clamping step and the centering step, the control method further includes: Detection: Based on the first detection component and the second detection component, detect the first position deviation of the welding end faces of the two workpieces to be welded along the longitudinal direction and the second position deviation along the vertical direction; and based on the first detection component or the second detection component, detect the distance between the welding end faces of the two workpieces to be welded along the transverse direction;

[0040] The centering step includes: Based on the first position deviation, control the longitudinal adjustment mechanism to drive the second fixture to move along the longitudinal direction, and based on the second position deviation, control the vertical adjustment mechanism to drive the second fixture to move along the vertical direction, so that the welding end faces of the two workpieces to be welded are coaxial along the transverse direction;

[0041] The abutting step includes: Based on the distance, control the transverse movement mechanism to drive the first fixture to move along the transverse direction, so that the welding end faces of the two workpieces to be welded abut.

[0042] Optionally, the resistance butt welding device includes a third detection component and a fourth detection component, the detection direction of the third detection component is perpendicular to the transverse direction, and the detection direction of the fourth detection component is parallel to the transverse direction; wherein, there is a preset coordinate relationship between the workpiece to be welded clamped by the second fixture and the fourth detection component;

[0043] Between the clamping step and the centering step, the control method further includes:

[0044] Detection: Based on the third detection component, detect the distance between the welding end faces of the two workpieces to be welded along the transverse direction; and based on the fourth detection component, detect the central coordinates of the welding end face of the workpiece to be welded clamped by the first fixture;

[0045] Calculation: Based on the central coordinates and the preset coordinate relationship, obtain the first position deviation of the welding end faces of the two workpieces to be welded along the longitudinal direction and the second position deviation along the vertical direction;

[0046] The centering step includes: controlling the longitudinal adjustment mechanism to drive the second fixture to move along the longitudinal direction based on the first position deviation, and controlling the vertical adjustment mechanism to drive the second fixture to move along the vertical direction based on the second position deviation, so that the welding end faces of the two workpieces to be welded are coaxial along the transverse direction;

[0047] The abutting step includes: controlling the lateral movement mechanism to drive the first fixture to move along the transverse direction based on the spacing, so that the welding end faces of the two workpieces to be welded abut.

[0048] A resistance butt welding control method provided by the present invention is applied to the above-mentioned resistance butt welding device, and has all the advantages of the above-mentioned resistance butt welding device, which will not be elaborated here.

[0049] A resistance butt welding control method provided by the present invention at least further has the following beneficial technical effects: First, the welding end faces of the two workpieces to be welded are centered, and then the welding end faces of the two workpieces to be welded are abutted and then butt welded. During the welding process, it is ensured that the welding end faces of the two workpieces to be welded are in abutting contact, improving the welding quality. Description of the Drawings

[0050] Figure 1 It is an assembly structure schematic diagram of a resistance butt welding device provided by an embodiment of the present invention;

[0051] Figure 2 It is a front view of a longitudinal adjustment mechanism and a vertical adjustment mechanism in a resistance butt welding device provided by an embodiment of the present invention;

[0052] Figure 3 It is a top view of a longitudinal adjustment mechanism and a vertical adjustment mechanism in a resistance butt welding device provided by an embodiment of the present invention;

[0053] Figure 4 It is an axonometric structure schematic of a longitudinal adjustment mechanism and a vertical adjustment mechanism in a resistance butt welding device provided by an embodiment of the present invention Figure 1 ;

[0054] Figure 5 It is an axonometric structure schematic of a longitudinal adjustment mechanism and a vertical adjustment mechanism in a resistance butt welding device provided by an embodiment of the present invention Figure 2 ;

[0055] Figure 6 It is a structure schematic diagram of a lateral movement mechanism in a resistance butt welding device provided by an embodiment of the present invention;

[0056] Figure 7 It is a structure schematic diagram of a welding power supply module in a resistance butt welding device provided by an embodiment of the present invention;

[0057] Figure 8 Schematic diagram of the control circuit board in a resistance butt welding device provided by an embodiment of the present invention;

[0058] Figure 9 Schematic diagram of the structure of the control device in a resistance butt welding device provided by an embodiment of the present invention;

[0059] Figure 10 Flow chart (1) of a resistance butt welding control method provided by an embodiment of the present invention;

[0060] Figure 11 Flow chart (2) of a resistance butt welding control method provided by an embodiment of the present invention;

[0061] Figure 12 Flow chart (3) of a resistance butt welding control method provided by an embodiment of the present invention;

[0062] Figure 13 Graph of the relationship between current and time in a resistance butt welding control method provided by an embodiment of the present invention.

[0063] Description of reference numerals:

[0064] 10. Base; 20. Longitudinal adjustment mechanism; 210. Mounting seat; 211. Base plate; 212. Protrusion; 213. First fixing block; 220. Guide assembly; 221. Fixed guide rail; 222. Movable guide rail; 230. Longitudinal moving seat; 231. Second fixing block; 240. Longitudinal driving assembly; 241. First adjusting screw; 242. Longitudinal moving block; 250. Longitudinal locking assembly; 251. Longitudinal adjusting plate; 252. First locking screw; 30. Vertical adjustment mechanism; 310. Vertical moving seat; 320. Vertical driving assembly; 321. Second adjusting screw; 322. Adapter block; 323. Vertical moving block; 330. Vertical locking assembly; 331. Vertical adjusting plate; 332. Second locking screw; 40. Transverse moving mechanism; 410. Transverse guide rail; 420. Transverse moving seat; 50. First fixture; 510. First support; 511. First adjustment screw; 512. First through hole; 520. First pressing plate; 530. First electrode plate; 531. First groove; 60. Second fixture; 610. Second support; 611. Second adjustment screw; 612. Second through hole; 620. Second pressing plate; 630. Second electrode plate; 631. Second groove; 710. First detection component; 720. Second detection component; 80. Welding power supply module; 810. Housing; 811. First electrode interface; 812. Second electrode interface; 820. Operation panel; 821. Display screen; 822. Current adjustment knob; 823. Reset button; 824. Start button; 830. Control circuit board; 831. Microprocessor; 832. Driving device; 833. Voltage / current monitoring unit; 834. High-frequency inverter device; 835. High-frequency rectifier device; 836. High-frequency transformer; 90. Control device; 910. Touch screen; 911. Spacing control module; 920. I / O port module; 930. Serial port module; 940. Start switch;

[0065] I1. First preset current; I2. Second preset current; I3. Third preset current; I4. Fourth preset current; I5. Fifth preset current; T1. First duration; T3. Third duration; T4. Fourth duration; T1'. First preset time; T2'. Second preset time; t1. First moment; t2. Second moment; t3. Third moment t3. Detailed implementation manners

[0066] To make the above objects, features and advantages of the present invention more obvious and understandable, the following Figure 1 -13 will describe the specific embodiments of the present invention in detail with reference to the attached

[0067] An electric resistance butt welding device is provided in an embodiment of the present invention. Refer to the attached Figure 1, the resistance butt welding device includes a base 10, a lateral movement mechanism 40, a longitudinal adjustment mechanism 20, and a vertical adjustment mechanism 30. The lateral movement mechanism 40 is installed on the base 10 and is drivingly connected to a first fixture 50; the longitudinal adjustment mechanism 20 and the vertical adjustment mechanism 30 are drivingly connected, and one of them is installed on the base 10, and the other is drivingly connected to a second fixture 60; for example, as Figure 1 shown, the longitudinal adjustment mechanism 20 is installed on the base 10, the vertical adjustment mechanism 30 is driven by the longitudinal adjustment mechanism 20 and is drivingly connected to the second fixture 60; and for another example, the vertical adjustment mechanism 30 is installed on the base 10, the longitudinal adjustment mechanism 20 is drivingly connected to the vertical adjustment mechanism 30 and is drivingly connected to the second fixture 60; the second fixture 60 and the first fixture 50 are arranged at intervals in the lateral direction, as Figure 1 shown, the lateral direction is the OX direction, and they are respectively used for clamping the workpieces to be welded; the longitudinal adjustment mechanism 20 and the vertical adjustment mechanism 30 are configured as follows: the longitudinal adjustment mechanism 20 and the vertical adjustment mechanism 30 are used to respectively drive the second fixture 60 to move in the longitudinal direction and the vertical direction to align the welding end faces of the two workpieces to be welded, that is, to make the welding end faces of the two workpieces to be welded coaxial in the lateral direction; the lateral movement mechanism 40 is configured as: used to drive the first fixture 50 to move in the lateral direction so that the welding end faces of the two workpieces to be welded abut against each other, as Figure 1 shown, the lateral direction is the OX direction, the longitudinal direction is the OY direction, and the vertical direction is the OZ direction.

[0068] A resistance butt welding device provided by an embodiment of the present invention has the following beneficial technical effects:

[0069] (1) By setting the longitudinal adjustment mechanism 20 and the vertical adjustment mechanism 30 to drive the second fixture 60 to clamp the workpiece to be welded to move, so as to align with the welding end face of the workpiece to be welded clamped by the first fixture 50. On the one hand, it can promote the full diffusion and recrystallization between the metal atoms of the workpiece to be welded, improving the density of the welding end face and the uniformity of the weld seam; on the other hand, it can improve the welding quality, reduce secondary welding and waste;

[0070] (2) By setting the lateral movement mechanism 40 to drive the first fixture 50 to clamp the workpiece to be welded to move, so as to abut against the welding end face of the workpiece to be welded clamped by the second fixture 60, making the welding end faces of the two workpieces to be welded closely fit. On the one hand, it makes the current evenly distributed, reduces the contact resistance fluctuation, ensures that the resistance heat is concentrated on the welding end face, so as to form a uniform plastic deformation layer and recrystallized structure, significantly improving the density and welding strength of the welding end face; on the other hand, it can eliminate the microscopic gap of the welding end face, avoiding defects such as incomplete fusion or cracks on the welding end face.

[0071] In an embodiment of the present invention, the resistance butt welding device further includes a detection component, and the installation position of the detection component can be various, specifically as follows:

[0072] In one embodiment, referring to the appended Figure 2 and Figure 3 , the resistance butt welding device further includes a first detection component 710 and a second detection component 720. The detection directions of the first detection component 710 and the second detection component 720 are both perpendicular to the transverse direction and are arranged at a preset angle; the first detection component 710 and the second detection component 720 are configured to: detect whether the welding end faces of two workpieces to be welded are coaxial along the transverse direction and the distance therebetween along the transverse direction; for example, as Figure 2 shown, the detection direction of the first detection component 710 is parallel to the vertical direction, such as the OZ direction shown in Figure 2 , and is used to detect the first position deviation of the welding end faces of two workpieces to be welded along the longitudinal direction; the detection direction of the second detection component 720 is parallel to the longitudinal direction, such as the OY direction shown in Figure 3 , and is used to detect the second position deviation of the welding end faces of two workpieces to be welded along the vertical direction; the first detection component 710 or the second detection component 720 is further used to detect the distance between the welding end faces of two workpieces to be welded along the transverse direction. It should be noted that the first detection component 710 and the second detection component 720 can be electrically connected to the transverse movement mechanism 40, the longitudinal adjustment mechanism 20, and the vertical adjustment mechanism 30 through a controller. The controller controls the longitudinal adjustment mechanism 20 to drive the second fixture 60 to move along the longitudinal direction based on the first position deviation, and the controller controls the vertical adjustment mechanism 30 to drive the second fixture 60 to move along the vertical direction based on the second position deviation, so that the welding end faces of two workpieces to be welded are coaxial along the transverse direction, that is, the centering of the welding end faces of two workpieces to be welded is realized; the controller controls the transverse movement mechanism 40 to drive the first fixture 50 to move along the transverse direction based on the distance, so that the welding end faces of two workpieces to be welded are abutted. For example, the first detection component 710 can be a camera, an infrared sensor, or an ultrasonic sensor; the second detection component 720 can be a camera, an infrared sensor, or an ultrasonic sensor. With such a setting, on the one hand, the real-time monitoring of the position deviation of the welding end faces of two workpieces to be welded is realized, the centering accuracy of the welding end faces of two workpieces to be welded is improved, the lack of fusion defect caused by poor centering is avoided, and the stability of the welding quality is ensured; on the other hand, the monitoring of the distance between the welding end faces of two workpieces to be welded along the transverse direction is realized, the fitting degree of the welding end faces of two workpieces to be welded is improved, and further the density and welding strength of the welding end face are improved, and defects such as lack of fusion or cracks on the welding end face are avoided.

[0073] In this embodiment, the first detection component 710 and the second detection component 720 are electrically connected to a display, and the display is used to magnify and monitor whether the welding end faces of two workpieces to be welded are centered. With such a setting, it is convenient for the user to quickly view the real-time dynamics of the welding end faces of two workpieces to be welded.

[0074] In another embodiment, the resistance butt welding device also includes a third detection component (not shown in the figure) and a fourth detection component (not shown in the figure), the detection direction of the third detection component is perpendicular to the transverse direction, and is used to detect the distance between the welding end faces of the two parts to be welded along the transverse direction; the detection direction of the fourth detection component is parallel to the transverse direction, and is used to detect whether the welding end faces of the two parts to be welded are coaxial along the transverse direction. For example, the detection direction of the third detection component is along the vertical direction or the longitudinal direction, and the detection direction of the fourth detection component is parallel to the transverse direction; it should be noted that the third detection component can be electrically connected to the transverse moving mechanism 40 through the controller, and the controller controls the transverse moving mechanism 40 based on the spacing to drive the first clamp 50 to move in the transverse direction, so that the welding end faces of the two parts to be welded are abutted; the fourth detection component can be electrically connected to the longitudinal adjustment mechanism 20 and the vertical adjustment mechanism 30 respectively through the controller, and the controller controls the longitudinal adjustment mechanism 20 based on the first position deviation to drive the second clamp 60 to move in the longitudinal direction, and controls the vertical adjustment mechanism 30 based on the second position deviation to drive the second clamp 60 to move in the vertical direction, so that the welding end faces of the two parts to be welded are coaxial along the transverse direction, that is, the centering of the welding end faces of the two parts to be welded is achieved. For example, the third detection component can be a camera, an infrared sensor or an ultrasonic sensor; the fourth detection component can be a camera, an infrared sensor or an ultrasonic sensor. With such an arrangement, on the one hand, real-time monitoring of the position deviation of the welding end faces of the two parts to be welded can be achieved, thereby improving the centering accuracy of the welding end faces of the two parts to be welded, avoiding the unfusion defects caused by poor centering, and ensuring the stability of the welding quality; on the other hand, monitoring of the spacing between the welding end faces of the two parts to be welded along the transverse direction can be achieved, thereby improving the fit of the welding end faces of the two parts to be welded, thereby improving the density and welding strength of the welding end faces, and avoiding defects such as unfusion or cracks on the welding end faces.

[0075] In this embodiment, the third detection component and the fourth detection component are electrically connected to a display, and the display is used to magnify and monitor whether the welding end faces of the two welded parts are aligned. This arrangement is convenient for quickly viewing the real-time dynamics of the welding end faces of the two welded parts.

[0076] In the embodiment of the present invention, see the attached Figure 1 and Figure 4 The longitudinal adjustment mechanism 20 includes a longitudinal drive assembly 240 and a longitudinal displacement seat 230, wherein the longitudinal drive assembly 240 is mounted on the base 10 and is transmission-connected to the longitudinal displacement seat 230; the vertical adjustment mechanism 30 includes a vertical drive assembly 320 and a vertical displacement seat 310, wherein the vertical drive assembly 320 is mounted on the longitudinal displacement seat 230 and is transmission-connected to the vertical displacement seat 310; and the second clamp 60 is fixedly mounted on the horizontal portion of the vertical displacement seat 310. In this arrangement, by integrating the vertical drive assembly 320 with the longitudinal displacement seat 230, it is avoided to occupy additional space in the lateral direction, thereby improving the utilization of space and making the structure compact.

[0077] In an embodiment of the present invention, referring to the attached Figure 2 , the longitudinal adjustment mechanism 20 further includes a guiding assembly 220. The guiding assembly 220 includes a fixed guide rail 221, a movable guide rail 222, and rollers (not shown in the figure) disposed between the two. There are multiple rollers and they are spaced apart. The fixed guide rail 221 is installed on the base 10, and the movable guide rail 222 is fixedly provided on the longitudinal movement seat 230. The guiding assembly 220 is configured such that the longitudinal movement seat 230 moves relative to the base 10 in the longitudinal direction. With such a setting, it provides guidance for the movement of the longitudinal movement seat 230 relative to the base 10 in the longitudinal direction; the contact area between the movable guide rail 222 and the rollers is large, which improves the movement stability of the longitudinal movement seat 230.

[0078] In an embodiment of the present invention, the rollers can be ball bearings or cylindrical rollers, etc.; the rollers can be installed on the side wall surface of the fixed guide rail 221, or on the side wall surface of the movable guide rail 222, or can be provided in a roller cage. For example, the guiding assembly 220 is a crossed roller guide rail, and the guiding assembly 220 further includes a roller cage. The roller cage is disposed between the fixed guide rail 221 and the movable guide rail 222, and multiple rollers are arranged crosswise along the length direction of the roller cage.

[0079] In an embodiment of the present invention, referring to the attached Figure 2 , the longitudinal adjustment mechanism 20 further includes a mounting seat 210. The mounting seat 210 includes a bottom plate 211 and a protruding portion 212 that are vertically connected. The bottom plate 211 is fixedly provided on the base 10, and the guiding assembly 220 is disposed on both sides of the protruding portion 212. The side surface of the fixed guide rail 221 abuts against the side wall surface of the protruding portion 212; the longitudinal movement seat 230 is a U-shaped longitudinal movement seat with its opening facing downward. The upper surface of the movable guide rail 222 is fixedly provided on the inner top wall surface of the U-shaped longitudinal movement seat, and the side surface of the movable guide rail 222 abuts against the inner side wall surface of the U-shaped longitudinal movement seat. With such a setting, on the one hand, the guiding assembly 220 is disposed on both sides of the protruding portion 212 to form a symmetric force-bearing structure; on the other hand, the movable guide rail 222 is in contact with both the inner top wall surface and the inner side wall surface of the U-shaped longitudinal movement seat, realizing two-way limiting in the vertical direction and the horizontal direction; in addition, the close fit between the side surface of the fixed guide rail 221 and the side wall surface of the protruding portion 212 can effectively eliminate the assembly gap and prevent shaking during the movement process.

[0080] In an embodiment of the present invention, referring to the attached Figure 4, a first fixed block 213 is fixedly arranged on the side of the mounting seat 210; the longitudinal drive assembly 240 includes a longitudinal movable block 242 and a first adjusting screw 241, and the longitudinal movable block 242 is fixedly arranged on the longitudinal displacement seat 230; the middle part of the first adjusting screw 241 is threadedly connected to the first fixed block 213, and the power output end of the first adjusting screw 241 abuts against the longitudinal movable block 242, which is used to drive the longitudinal movable block 242 to move in the longitudinal direction. It should be noted that the power input end of the first adjusting screw 241 can be manually or connected by motor transmission. With such a configuration, the longitudinal displacement seat 230 can be moved in the longitudinal direction, and the structure is simple and compact.

[0081] In the embodiment of the present invention, the first fixing block 213 has a first cavity, a first sleeve is fixed in the first cavity, and a middle portion of the first adjusting screw 241 is threadedly connected to the first sleeve.

[0082] In the embodiment of the present invention, see the attached Figure 5 The longitudinal adjustment mechanism 20 also includes a longitudinal locking assembly 250, which includes a longitudinal adjustment plate 251, a first locking screw 252 and a first locking nut. The longitudinal adjustment plate 251 is fixed to the side wall of the mounting seat 210, and the longitudinal adjustment plate 251 has a first strip through hole, which extends in the longitudinal direction. The first locking nut is fixed to the side wall of the longitudinal displacement seat 230, and the first locking screw 252 passes through the first strip through hole and cooperates with the first locking nut. In this way, the position of the longitudinal displacement seat 230 is locked to prevent the longitudinal displacement seat 230 from accidentally moving, causing the welding end face of the welded parts to be misaligned during the butt welding process, thereby affecting the butt welding quality.

[0083] In the embodiment of the present invention, see the attached Figure 4 The vertical adjustment mechanism 30 further includes a vertical guide rail (not shown in the figure), which is mounted on the longitudinal shift seat 230. The vertical portion of the vertical shift seat 310 is perpendicular to the horizontal portion of the vertical shift seat 310 and is slidably connected to the vertical guide rail. This arrangement provides guidance for the vertical shift seat 310 to move in the vertical direction, thereby improving the stability of the vertical shift seat 310.

[0084] In the embodiment of the present invention, see the attached Figure 4, the vertical shift seat 310 is fixed with a second fixed block 231; the vertical drive assembly 320 includes a second adjusting screw 321 and a vertical movable block 323, the vertical movable block 323 is fixed on the lower surface of the horizontal part of the vertical shift seat 310; the axis of the second adjusting screw 321 extends in the longitudinal direction, the middle part of the second adjusting screw 321 is threadedly connected to the second fixed block 231, and a transfer block 322 is transmission-connected between the power output end of the second adjusting screw 321 and the vertical movable block 323, and the transfer block 322 is used to convert the movement of the second adjusting screw 321 in the longitudinal direction into the movement in the vertical direction to drive the vertical movable block 323 to move in the vertical direction. It should be noted that the power input end of the second adjusting screw 321 can be manually or through a motor transmission connection. With such a configuration, the vertical movement of the vertical shift seat 310 is realized, and the structure is simple and compact.

[0085] In the embodiment of the present invention, the second fixing block 231 has a second cavity, a second sleeve is fixed in the second cavity, and a middle portion of the second adjusting screw 321 is threadedly connected to the second sleeve.

[0086] In the embodiment of the present invention, see the attached Figure 5 The vertical adjustment mechanism 30 also includes a vertical locking assembly 330, which includes a vertical adjustment plate 331, a second locking screw 332 and a second locking nut. The vertical adjustment plate 331 is fixed to the side wall of the vertical guide rail, and the vertical adjustment plate 331 has a second strip-shaped through hole, which extends in the vertical direction. The second locking nut is fixed to the vertical portion of the vertical displacement seat 310, and the second locking screw 332 passes through the second strip-shaped through hole and cooperates with the second locking nut. In this way, the position of the vertical displacement seat 310 is locked to prevent the longitudinal displacement seat 230 from accidentally moving, which causes the welding end face of the welded parts to be dislocated during the butt welding process, thereby affecting the butt welding quality.

[0087] In the embodiment of the present invention, the structure of the transfer block 322 is not limited, and is specifically as follows: For example, see the attached Figure 4 The adapter block 322 is a V-shaped block, the middle part of the V-shaped block is pivotally connected to the vertical guide rail, the opening of the V-shaped block faces downward, one end of the V-shaped block abuts against the power output end of the second adjusting screw 321, and the other end of the V-shaped block abuts against the vertical movable block 323; for another example, the adapter block 322 is a wedge-shaped block (not shown in the figure), the side surface of the wedge-shaped block is fixedly arranged on the power output end of the second adjusting screw 321, and the inclined surface of the wedge-shaped block abuts against the inclined surface of the vertical movable block 323.

[0088] In the embodiment of the present invention, see the attached Figure 6, the lateral movement mechanism 40 includes a lateral movement drive assembly, a lateral movement guide rail 410, and a lateral movement seat 420. The lateral movement guide rail 410 is installed on the base 10. The lateral movement drive assembly is installed on the base 10 and is drivingly connected to the lateral movement seat 420, and is used to drive the lateral movement seat 420 to move in the lateral direction to abut against the welding end face of the workpiece to be welded. It should be noted that the lateral movement drive assembly may include a lateral movement motor or a lateral movement electric push rod. With such a setting, the lateral movement seat 420 drives the first clamp 50 to clamp the workpiece to be welded and abut against the welding end face of the workpiece to be welded clamped by the second clamp 60.

[0089] In the embodiment of the present invention, referring to the attached Figure 6 , the first clamp 50 includes a first support 510, a first pressing plate 520, and a first electrode plate 530. The first support 510 is fixedly provided on the lateral movement seat 420; the first electrode plate 530 is fixedly provided on the first support 510. The first pressing plate 520 and the first electrode plate 530 are arranged opposite to each other in the vertical direction. The first pressing plate 520 is movably connected to the first support 510 in the vertical direction; a workpiece to be welded is clamped between the first electrode plate 530 and the first pressing plate 520; the second clamp 60 includes a second support 610, a second pressing plate 620, and a second electrode plate 630. The second support 610 is fixedly provided on the horizontal portion of the vertical movement seat 310. The second electrode plate 630 is fixedly provided on the second support 610. The second pressing plate 620 and the second electrode plate 630 are arranged opposite to each other in the vertical direction. The second pressing plate 620 is movably connected to the second support 610 in the vertical direction; another workpiece to be welded is clamped between the second electrode plate 630 and the second pressing plate 620; wherein, the polarities of the first electrode plate 530 and the second electrode plate 630 are opposite. It should be noted that the first electrode plate 530 is electrically connected to one of the positive electrode and the negative electrode, and the second electrode plate 630 is electrically connected to the other. With such a setting, the first clamp 50 and the second clamp 60 have a simple structure and are convenient to operate.

[0090] In the embodiment of the present invention, referring to the attached Figure 5 and Figure 6, the first support 510 has a first through hole 512, the first electrode plate 530 is fixedly arranged in the first through hole 512 and the lower surface of the first electrode plate 530 abuts against the lower surface of the first through hole 512; the first support 510 is threadedly connected with a first adjusting screw 511, the first adjusting screw 511 penetrates into the first through hole 512 and is fixedly arranged on the first pressing plate 520, and the first adjusting screw 511 is used to drive the first pressing plate 520 to move in the vertical direction to clamp a workpiece to be welded between the first pressing plate 520 and the first electrode plate 530; the second support 610 has a second through hole 612, the second electrode plate 630 is fixedly arranged in the second through hole 612 and the lower surface of the second electrode plate 630 abuts against the lower surface of the second through hole 612; the second support 610 is threadedly connected with a second adjusting screw 611, the second adjusting screw 611 penetrates into the second through hole 612 and is fixedly arranged on the second pressing plate 620, and the second adjusting screw 611 is used to drive the second pressing plate 620 to move in the vertical direction to clamp another workpiece to be welded between the second pressing plate 620 and the second electrode plate 630. With such a setting, the first through hole 512 provides support for the first electrode plate 530 and guides the movement of the first pressing plate 520 in the vertical direction; the second through hole 612 provides support for the second electrode plate 630 and guides the movement of the second pressing plate 620 in the vertical direction.

[0091] In the embodiment of the present invention, referring to the attached Figure 5 and Figure 6 , the first through hole 512 includes a first upper hole and a first lower hole that communicate with each other, the opening size of the first upper hole is smaller than the opening size of the first lower hole, the side wall surface of the first pressing plate 520 is fitted to the side wall surface of the first upper hole, and the first electrode plate 530 is fitted to the inner wall surface of the first lower hole; the second through hole 612 includes a second upper hole and a second lower hole that communicate with each other, the opening size of the second upper hole is smaller than the opening size of the second lower hole, the side wall surface of the second pressing plate 620 is fitted to the side wall surface of the second upper hole, and the second electrode plate 630 is fitted to the inner wall surface of the second lower hole. With such a setting, the first lower hole is used to limit the first electrode plate 530, and the first upper hole is used to guide the movement of the first pressing plate 520 in the vertical direction; the second lower hole is used to limit the second electrode plate 630, and the second upper hole is used to guide the movement of the second pressing plate 620 in the vertical direction.

[0092] In the embodiment of the present invention, referring to the attached Figure 5 and Figure 6, the cross-sectional shape of the workpiece to be welded is cylindrical or filamentous; the first electrode plate 530 is provided with a first groove 531, and the second electrode plate 630 is provided with a second groove 631. The axes of the first groove 531 and the second groove 631 both extend along the transverse direction and their axes can be collinear. The two workpieces to be welded are respectively fitted with the first groove 531 and the second groove 631. With such a setting, on the one hand, the first groove 531 and the second groove 631 can guide the current to uniformly diffuse along the edges of the first groove 531 and the second groove 631, avoiding too high local current density at the contact surfaces between the first electrode plate 530 and the second electrode plate 630 and the workpieces to be welded respectively, thereby reducing the random fluctuation of the contact resistance; on the other hand, the first groove 531 and the second groove 631 increase the contact area between the first electrode plate 530 and the second electrode plate 630 and the workpieces to be welded, thereby enhancing the clamping stability of the first fixture 50 and the second fixture 60 to the workpieces to be welded.

[0093] In an embodiment of the present invention, the two workpieces to be welded can be a nickel-titanium alloy wire and a stainless steel wire respectively. The nickel-titanium alloy wire is fitted with one of the first groove 531 and the second groove 631, and the stainless steel wire is fitted with the other.

[0094] In an embodiment of the present invention, both the first groove 531 and the second groove 631 have a plurality of them. The plurality of first grooves 531 and the plurality of second grooves 631 all have different diameters, and the first grooves 531 and the second grooves 631 with the same diameter correspond to each other one by one. With such a setting, the practicability of the first fixture 50 and the second fixture 60 is improved to adapt to workpieces to be welded with different diameters.

[0095] In an embodiment of the present invention, referring to the attached Figure 5 - Figure 7 , the resistance butt welding device further includes a welding power supply module 80. The welding power supply module 80 includes a housing 810. The housing 810 is provided with a first electrode interface 811 and a second electrode interface 812. The first electrode interface 811 and the first electrode plate 530 are electrically connected through a cable 825, and the second electrode interface 812 and the second electrode plate 630 are electrically connected through a cable 825. The polarities of the first electrode interface 811 and the second electrode interface 812 are opposite.

[0096] In an embodiment of the present invention, referring to the attached Figure 7 and Figure 8, the housing 810 is provided with an operation panel 820. The operation panel 820 is provided with a display screen 821, a current adjustment knob 822, a reset button 823 and a start button 824. A control circuit board 830 is provided inside the display screen 821. The control circuit board 830 includes a microprocessor 831, a driving device 832, a voltage / current monitoring unit 833, a high-frequency inverter device 834, a high-frequency rectifier device 835 and a high-frequency transformer 836. The microprocessor 831 drives the high-frequency inverter device 834 by sending control signals to the driving device 832; the high-frequency inverter device 834 is connected to the high-frequency transformer 836, and the high-frequency transformer 836 is connected to the high-frequency rectifier device 835; the high-frequency rectifier device 835 outputs the current for the welding process to the first electrode interface 811 and the second electrode interface 812.

[0097] It should be noted that the high-frequency inverter device 834 uses a full-bridge topology and adjusts the output voltage by adjusting the duty cycle; the high-frequency transformer 836 plays a role in isolation and impedance transformation, converting the input characteristics of high voltage and small current into the output characteristics of low voltage and large current: the high-frequency rectifier device 835 converts high-frequency alternating current into direct current to provide energy for butt welding, which provides conditions for precise control of the waveform. Since the current output adopts the AC-DC-AC-DC conversion technology, the time control reaches millisecond-level accuracy, and the control response and control accuracy are greatly improved. At the same time, the DC output significantly improves the welding processability; the adoption of the microprocessor 831 and electronic technology enables the device to have excellent functions of modern devices, and the inverter technology also makes the device have a series of advantages such as small size, energy saving and high efficiency.

[0098] It should be noted that the display screen 821 is a touch display screen, and parameters such as welding current and welding time can be set through the touch display screen and the current adjustment knob.

[0099] It should be noted that the output welding current is direct current, with concentrated heat, improving the welding thermal efficiency, stable welding process and significantly improved welding quality.

[0100] In the embodiment of the present invention, the resistance butt welding device further includes a control device 90. The control device 90 is electrically connected to the longitudinal adjustment mechanism 20, the vertical adjustment mechanism 30 and the lateral movement mechanism 40 respectively.

[0101] In the embodiment of the present invention, refer to the appendix Figure 7 , the control device 90 is located below the base 10.

[0102] In the embodiment of the present invention, refer to the appendix Figure 9, the control device 90 includes a touch screen 910, an I / O port module 920, a serial port module 930, and a start switch 940. Among them, the touch screen 910 is provided with a spacing control module 911. The transverse movement motor is electrically connected to the spacing control module 911 through the serial port module 930. The spacing control module 911 can control the movement of the transverse movement motor to precisely adjust the movement of the transverse movement seat 420 along the transverse direction so that the welding end faces of the two workpieces to be welded are in contact; the serial port module 930 is electrically connected to the touch screen 910. Through the touch screen 910, parameters such as the feed amount, feed speed, feed acceleration, displacement, and power-on delay of the workpiece to be welded in the transverse direction during the welding process can be set; the I / O port module 920 is electrically connected to the start switch 940. With such a setting, a digital control system is adopted, which is convenient and accurate to control.

[0103] In an embodiment of the present invention, a resistance butt welding control method is further provided, which is applied to the above-mentioned resistance butt welding device. Refer to the appendix Figure 10 and Figure 11 , the control method includes the following steps:

[0104] S100, clamping: Clamp a workpiece to be welded with a preset length on the first fixture 50, and clamp another workpiece to be welded with a preset length on the second fixture 60;

[0105] S120, centering: Control the longitudinal adjustment mechanism 20 and the vertical adjustment mechanism 30 to drive the second fixture 60 to move along the longitudinal direction and the vertical direction respectively so that the welding end faces of the two workpieces to be welded are coaxial in the transverse direction, that is, to center the welding end faces of the two workpieces to be welded;

[0106] S140, abutting: Control the transverse movement mechanism 40 to drive the first fixture 50 to move along the transverse direction so that the welding end faces of the two workpieces to be welded are in contact; it should be noted that when the welding end faces of the two workpieces to be welded are in contact, there is a certain acting force between the welding end faces of the two workpieces to be welded;

[0107] S160, butt welding: Butt weld the welding end faces of the two workpieces to be welded to obtain a welded workpiece.

[0108] A resistance butt welding control method provided by an embodiment of the present invention first centers the welding end faces of the two workpieces to be welded, then makes the welding end faces of the two workpieces to be welded in contact and then butt welds. During the welding process, it is ensured that the welding end faces of the two workpieces to be welded are in contact, improving the welding quality.

[0109] In an embodiment of the present invention, in one implementation manner, the resistance butt welding device includes a first detection component 710 and a second detection component 720. The detection directions of the first detection component 710 and the second detection component 720 are both perpendicular to the transverse direction and are set at a preset angle;

[0110] Between the steps of step S100 clamping and step S120 centering, refer to the appendix Figure 10 , the control method further includes:

[0111] S110, Detection: Based on the first detection component 710 and the second detection component 720, detect the first position deviation of the welding end faces of the two workpieces to be welded in the longitudinal direction and the second position deviation in the vertical direction; and based on the first detection component 710 or the second detection component 720, detect the distance between the welding end faces of the two workpieces to be welded in the transverse direction; for example, as Figure 2 shown, the detection direction of the first detection component 710 is parallel to the vertical direction, such as Figure 2 shown in the OZ direction, for detecting the first position deviation of the welding end faces of the two workpieces to be welded in the longitudinal direction; the detection direction of the second detection component 720 is parallel to the longitudinal direction, such as Figure 3 shown in the OY direction, for detecting the second position deviation of the welding end faces of the two workpieces to be welded in the vertical direction;

[0112] S120, The centering step includes: Based on the first position deviation, control the longitudinal adjustment mechanism 20 to drive the second fixture 60 to move in the longitudinal direction, and based on the second position deviation, control the vertical adjustment mechanism 30 to drive the second fixture 60 to move in the vertical direction, so that the welding end faces of the two workpieces to be welded are coaxial in the transverse direction;

[0113] S140, The abutting step includes: Based on the distance, control the lateral movement mechanism 40 to drive the first fixture 50 to move in the transverse direction, so that the welding end faces of the two workpieces to be welded abut to obtain the welded workpiece.

[0114] A resistance butt welding control method provided by an embodiment of the present invention realizes real-time monitoring of the position deviation of the welding end faces of two workpieces to be welded through the first detection component 710 and the second detection component 720, and controls the movement of the longitudinal adjustment mechanism 20 and the vertical adjustment mechanism 30 based on the position deviation, so as to improve the centering accuracy of the welding end faces of the two workpieces to be welded, avoid the lack of fusion defect caused by poor centering, and ensure the stability of the welding quality; on the other hand, realize the monitoring of the distance between the welding end faces of the two workpieces to be welded in the transverse direction, and control the movement of the lateral movement mechanism 40 based on the distance, so as to improve the fitting degree of the welding end faces of the two workpieces to be welded, and further improve the compactness and welding strength of the welding end faces, and avoid defects such as lack of fusion or cracks on the welding end faces.

[0115] In an embodiment of the present invention, in another implementation manner, the resistance butt welding device includes a third detection component and a fourth detection component. The detection direction of the third detection component is perpendicular to the transverse direction, and the detection direction of the fourth detection component is parallel to the transverse direction. For example, the detection direction of the third detection component is along the vertical direction or the longitudinal direction, and the detection direction of the fourth detection component is parallel to the transverse direction. Among them, the workpieces to be welded clamped by the second clamp 60 have a preset coordinate relationship with the fourth detection component;

[0116] Between the steps of step S100 clamping and step S120 centering, refer to the appendix Figure 11 , the control method further includes:

[0117] S112, detection: Based on the third detection component, detect the distance between the welding end faces of the two workpieces to be welded along the transverse direction; and based on the fourth detection component, detect the center coordinates of the welding end face of the workpiece to be welded clamped by the first clamp 50;

[0118] S114, calculation: Based on the center coordinates and the preset coordinate relationship, obtain the first position deviation of the welding end faces of the two workpieces to be welded along the longitudinal direction and the second position deviation along the vertical direction; It should be noted that based on the center coordinates and the preset coordinate relationship, through existing coordinate transformation, the first position deviation and the second position deviation are obtained, which are not limited here.

[0119] S120, the centering step includes: Based on the first position deviation, control the longitudinal adjustment mechanism 20 to drive the second clamp 60 to move along the longitudinal direction, and based on the second position deviation, control the vertical adjustment mechanism 30 to drive the second clamp 60 to move along the vertical direction, so that the welding end faces of the two workpieces to be welded are coaxial along the transverse direction;

[0120] S140, the butting step includes: Based on the distance, control the transverse movement mechanism 40 to drive the first clamp 50 to move along the transverse direction, so that the welding end faces of the two workpieces to be welded are butted.

[0121] A resistance butt welding control method provided by an embodiment of the present invention realizes real-time monitoring of the position deviation of the welding end faces of two workpieces to be welded through a third detection component and a fourth detection component, and controls the movement of the longitudinal adjustment mechanism 20 and the vertical adjustment mechanism 30 based on the position deviation to improve the centering accuracy of the welding end faces of the two workpieces to be welded, avoid the lack of fusion defect caused by poor centering, and ensure the stability of the welding quality; on the other hand, realize the monitoring of the distance between the welding end faces of the two workpieces to be welded along the transverse direction, and control the movement of the transverse movement mechanism 40 based on the distance to improve the fitting degree of the welding end faces of the two workpieces to be welded, thereby improving the density and welding strength of the welding end faces, and avoiding defects such as lack of fusion or cracks on the welding end faces.

[0122] In an embodiment of the present invention, the first fixture 50 includes a first electrode plate 530, and the second fixture 60 includes a second electrode plate 630;

[0123] S160. Butt welding, the step of obtaining a welded part by butt welding the parts to be welded, see the appendix Figure 12 and Figure 13 , the control method includes:

[0124] S161. Preheating: At the first moment t1, control the current applied to the first electrode plate 530 and the second electrode plate 630 to gradually increase from the first preset current I1 to the second preset current I2, and keep the current as the second preset current I2 to preheat the end of the part to be welded for the first duration T1; After an interval of the first preset time T1', perform welding; In the preheating stage, as the current increases, the end of the part to be welded starts to heat up and soften. The transverse movement mechanism 40 drives the cross slide 420 to move in the transverse direction, so that the welding end faces of the two parts to be welded are pressed against each other, generating a certain acting force, causing plastic deformation of the end faces of the parts to be welded, increasing the contact area of the ends of the parts to be welded, and reducing the contact resistance. Preheating can reduce the influence of the contact state on the welding quality. If preheating is not carried out, the consistency of butt welding is poor, resulting in a low yield;

[0125] S162. Welding: At the second moment t2, control the current applied to the first electrode plate 530 and the second electrode plate 630 to be the third preset current I3, and keep the current as the third preset current I3 to weld the preheated part to be welded for the third duration T3; In this stage, the current is kept as the third preset current I3 to weld the preheated part to be welded for the third duration T3. The third duration T3 is between 100 ms and 250 ms, so that the welding end face is kept above the austenite transformation temperature of 850 - 1050 °C, and the welding end faces of the two parts to be welded are tightly fused, and atoms diffuse sufficiently to form a welded joint. If the third preset current I3 is too large or the second duration is too long, it is easy to cause overburning and blackening of the end in the air; if the third preset current I3 is too small or the second duration is too short, fusion welding cannot be achieved. Therefore, it is necessary to limit the third preset current I3 and the third duration T3 within a certain range to ensure sufficient fusion welding of the two and improve the welding quality; After an interval of the second preset time T2', perform tempering;

[0126] S163, Tempering: At the third moment t3, control the current applied to the first electrode plate 530 and the second electrode plate 630 to be the fourth preset current I4, and keep the current at the fourth preset current I4 for a fourth duration T4 and then gradually decrease it to the fifth preset current I5; wherein, the third moment t3 is later than the second moment t2, and the second moment t2 is later than the first moment t1. After welding, the welded part needs to be cooled and crystallized, and it needs to be carried out under a certain pressure. Therefore, the purpose of tempering is to eliminate quenching stress, transform the structure of the welded part into a relatively stable state, and improve its plasticity and toughness without reducing or appropriately reducing the hardness and strength of the welded part, so as to obtain excellent mechanical properties.

[0127] It should be noted that the preset process parameters are input by the display screen 821, and the preset process parameters include the first preset current I1, the second preset current I2, the third preset current I3, the fourth preset current I4, the fifth preset current I5, the first duration T1, the third duration T3, the fourth duration T4, the first preset time T1', the second preset time T2', the first moment t1, the second moment t2, and the third moment t3; wherein, the unit of each preset current is: KA; the unit of each preset time and each duration is: ms.

[0128] It should be noted that the microcontroller collects the instantaneous voltage and current output and calculates the true effective values of the voltage and current. During the welding process, the true effective value of the welding current is measured, and the precise control of the current is the premise to ensure the welding quality.

[0129] A resistance butt welding control method provided by an embodiment of the present invention, based on preset process parameters, butt-welds the parts to be welded to obtain a welded part, and adopts the process of preheating - welding - tempering. On the one hand, through preheating, the influence of the contact state on the welding quality is reduced, the consistency of butt welding is improved, and the yield is increased; on the other hand, in the welding stage, the third preset current I3 and the third duration T3 are limited within a certain range to ensure that the parts to be welded are fully welded and the welding quality is improved; on the third hand, tempering is performed to eliminate quenching stress, transform the structure of the welded part into a relatively stable state, and improve its plasticity and toughness without reducing or appropriately reducing the hardness and strength of the welded part, so as to obtain excellent mechanical properties; in addition, the preset process parameters are digitally controlled and adjusted, with high control precision and small anti-interference ability.

[0130] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be subject to the scope defined by the claims.

Claims

1. A resistance butt welding device, characterized in that, It includes a base (10), a lateral movement mechanism (40), a longitudinal adjustment mechanism (20), and a vertical adjustment mechanism (30). The lateral movement mechanism (40) is installed on the base (10) and is drivingly connected to a first clamp (50); the longitudinal adjustment mechanism (20) and the vertical adjustment mechanism (30) are drivingly connected. One of them is installed on the base (10), and the other is drivingly connected to a second clamp (60); the second clamp (60) and the first clamp (50) are arranged at intervals in the lateral direction and are respectively used for clamping workpieces to be welded. The longitudinal adjustment mechanism (20) and the vertical adjustment mechanism (30) are configured such that: the longitudinal adjustment mechanism (20) and the vertical adjustment mechanism (30) are used to respectively drive the second clamp (60) to move in the longitudinal direction and the vertical direction to align the welding end faces of the two workpieces to be welded. The lateral movement mechanism (40) is configured such that: it is used to drive the first clamp (50) to move in the lateral direction so that the welding end faces of the two workpieces to be welded abut against each other.

2. The resistance butt welding device according to claim 1, characterized in that, The resistance butt welding device further includes a first detection component (710) and a second detection component (720). The detection directions of the first detection component (710) and the second detection component (720) are both perpendicular to the lateral direction and are arranged at a preset angle; the first detection component (710) and the second detection component (720) are configured such that: they are used to detect whether the welding end faces of the two workpieces to be welded are coaxial in the lateral direction and the distance therebetween in the lateral direction. Alternatively, the resistance butt welding device further includes a third detection component and a fourth detection component. The detection direction of the third detection component is perpendicular to the lateral direction and is used to detect the distance between the welding end faces of the two workpieces to be welded in the lateral direction; the detection direction of the fourth detection component is parallel to the lateral direction and is used to detect whether the welding end faces of the two workpieces to be welded are coaxial in the lateral direction.

3. The butt welding device according to claim 1 or 2, characterized in that, The longitudinal adjustment mechanism (20) includes a longitudinal driving component (240) and a longitudinally moving seat (230). The longitudinal driving component (240) is installed on the base (10) and is drivingly connected to the longitudinally moving seat (230). The vertical adjustment mechanism (30) includes a vertical driving component (320) and a vertically moving seat (310). The vertical driving component (320) is installed on the longitudinally moving seat (230) and is drivingly connected to the vertically moving seat (310). The second clamp (60) is fixed to the horizontal part of the vertically moving seat (310).

4. The resistance butt welding device according to claim 3, characterized in that, The longitudinal adjustment mechanism (20) further includes a guiding component (220). The guiding component (220) includes a fixed guide rail (221), a movable guide rail (222), and rollers provided therebetween. The fixed guide rail (221) is installed on the base (10), and the movable guide rail (222) is fixed to the longitudinally moving seat (230); the guiding component (220) is configured such that: the longitudinally moving seat (230) moves relative to the base (10) in the longitudinal direction. And / or, the vertical adjustment mechanism (30) further includes a vertical guide rail, the vertical guide rail is installed on the longitudinal movement base (230), and the vertical part of the vertical movement base (310) is perpendicular to the horizontal part of the vertical movement base (310) and is slidably connected to the vertical guide rail; And / or, the lateral movement mechanism (40) includes a lateral movement drive assembly, a lateral guide rail (410) and a lateral movement base (420), the lateral guide rail (410) is installed on the base (10), the lateral movement drive assembly is installed on the base (10) and is drivingly connected to the lateral movement base (420) for driving the lateral movement base (420) to move in the lateral direction to abut against the welding end face of the workpiece to be welded.

5. The butt welding device according to claim 4, characterized in that, The longitudinal adjustment mechanism (20) further includes a mounting base (210), the mounting base (210) includes a bottom plate (211) and a convex part (212) which are vertically connected, the bottom plate (211) is fixed on the base (10), the guiding assembly (220) is arranged on both sides of the convex part (212), and the side surface of the fixed guide rail (221) abuts against the side wall surface of the convex part (212); The longitudinal movement base (230) is a U-shaped longitudinal movement base, the opening of the U-shaped longitudinal movement base faces downward, the upper surface of the movable guide rail (222) is fixed on the inner top wall surface of the U-shaped longitudinal movement base, and the side surface of the movable guide rail (222) abuts against the inner side wall surface of the U-shaped longitudinal movement base.

6. The butt welding device according to claim 5, characterized in that, A first fixing block (213) is fixedly arranged on the side surface of the mounting base (210); the longitudinal drive assembly (240) includes a longitudinal movable block (242) and a first adjusting screw (241), the longitudinal movable block (242) is fixed on the longitudinal movement base (230); the middle part of the first adjusting screw (241) is threadedly connected to the first fixing block (213), and the power output end of the first adjusting screw (241) abuts against the longitudinal movable block (242) for driving the longitudinal movable block (242) to move in the longitudinal direction; And / or, the longitudinal adjustment mechanism (20) further includes a longitudinal locking assembly (250), the longitudinal locking assembly (250) includes a longitudinal adjustment plate (251), a first locking screw (252) and a first locking nut, the longitudinal adjustment plate (251) is fixed on the side wall surface of the mounting base (210), the longitudinal adjustment plate (251) has a first strip-shaped through hole which extends in the longitudinal direction, the first locking nut is fixed on the side wall surface of the longitudinal movement base (230), and the first locking screw (252) passes through the first strip-shaped through hole and cooperates with the first locking nut.

7. The butt welding device according to claim 4, characterized in that, The vertical moving seat (310) is fixedly provided with a second fixing block (231); the vertical driving assembly (320) includes a second adjusting screw (321) and a vertically movable block (323), and the vertically movable block (323) is fixedly arranged on the lower surface of the horizontal part of the vertical moving seat (310); the axis of the second adjusting screw (321) extends along the longitudinal direction, the middle part of the second adjusting screw (321) is in threaded connection with the second fixing block (231), and a transfer block (322) is in transmission connection between the power output end of the second adjusting screw (321) and the vertically movable block (323). The transfer block (322) is used to convert the movement of the second adjusting screw (321) in the longitudinal direction into the movement in the vertical direction to drive the vertically movable block (323) to move in the vertical direction; And / or, the vertical adjusting mechanism (30) further includes a vertical locking assembly (330). The vertical locking assembly (330) includes a vertical adjusting plate (331), a second locking screw (332) and a second locking nut. The vertical adjusting plate (331) is fixedly arranged on the side wall surface of the vertical guide rail. The vertical adjusting plate (331) has a second strip-shaped through hole which extends along the vertical direction. The second locking nut is fixedly arranged on the vertical part of the vertical moving seat (310), and the second locking screw (332) passes through the second strip-shaped through hole and cooperates with the second locking nut.

8. The butt welding device according to claim 7, characterized in that, The transfer block (322) is a V-shaped block. The middle part of the V-shaped block is pivotally connected to the vertical guide rail. The opening of the V-shaped block faces downward. One end of the V-shaped block abuts against the power output end of the second adjusting screw (321), and the other end of the V-shaped block abuts against the vertically movable block (323); Or, the transfer block (322) is a wedge-shaped block. The side surface of the wedge-shaped block is fixedly arranged on the power output end of the second adjusting screw (321), and the inclined surface of the wedge-shaped block is in abutting fit with the inclined surface of the vertically movable block (323).

9. The butt welding device according to claim 4, characterized in that, The first fixture (50) includes a first support (510), a first pressing plate (520) and a first electrode plate (530). The first support (510) is fixedly arranged on the transverse moving seat (420); the first electrode plate (530) is fixedly arranged on the first support (510). The first pressing plate (520) and the first electrode plate (530) are arranged oppositely along the vertical direction, and the first pressing plate (520) is movably connected to the first support (510) along the vertical direction; a workpiece to be welded is clamped between the first electrode plate (530) and the first pressing plate (520); The second fixture (60) includes a second support (610), a second pressing plate (620), and a second electrode plate (630). The second support (610) is fixed to the horizontal part of the vertical moving seat (310). The second electrode plate (630) is fixed to the second support (610). The second pressing plate (620) and the second electrode plate (630) are arranged opposite to each other in the vertical direction. The second pressing plate (620) is movably connected to the second support (610) in the vertical direction. The other workpiece to be welded is clamped between the second electrode plate (630) and the second pressing plate (620). Wherein, the polarities of the first electrode plate (530) and the second electrode plate (630) are opposite.

10. The resistance butt welding device according to claim 9, characterized in that, The first support (510) has a first through hole (512). The first electrode plate (530) is fixed in the first through hole (512) and the lower surface of the first electrode plate (530) abuts against the lower surface of the first through hole (512). The first support (510) is threadedly connected with a first adjusting screw (511). The first adjusting screw (511) penetrates into the first through hole (512) and is fixed to the first pressing plate (520). The first adjusting screw (511) is used to drive the first pressing plate (520) to move in the vertical direction to clamp a workpiece to be welded between the first pressing plate (520) and the first electrode plate (530). The second support (610) has a second through hole (612). The second electrode plate (630) is fixed in the second through hole (612) and the lower surface of the second electrode plate (630) abuts against the lower surface of the second through hole (612). The second support (610) is threadedly connected with a second adjusting screw (611). The second adjusting screw (611) penetrates into the second through hole (612) and is fixed to the second pressing plate (620). The second adjusting screw (611) is used to drive the second pressing plate (620) to move in the vertical direction to clamp the other workpiece to be welded between the second pressing plate (620) and the second electrode plate (630).

11. The resistance butt welding device according to claim 10, wherein The first through hole (512) includes a first upper hole and a first lower hole that communicate with each other. The opening size of the first upper hole is smaller than the opening size of the first lower hole. The side wall surface of the first pressing plate (520) is fitted to the side wall surface of the first upper hole. The first electrode plate (530) is fitted to the inner wall surface of the first lower hole. The second through hole (612) includes a second upper hole and a second lower hole that communicate with each other. The opening size of the second upper hole is smaller than the opening size of the second lower hole. The side wall surface of the second pressing plate (620) is fitted to the side wall surface of the second upper hole. The second electrode plate (630) is fitted to the inner wall surface of the second lower hole.

12. A resistance butt welding control method, characterized in that Applied to the resistance butt welding device according to any one of claims 2-11, the control method includes: Clamping: Clamp one of the workpieces to be welded with a preset length on the first fixture (50), and clamp the other workpiece to be welded with a preset length on the second fixture (60); Centering: Control the longitudinal adjustment mechanism (20) and the vertical adjustment mechanism (30) to drive the second fixture (60) to move along the longitudinal direction and the vertical direction respectively, so that the welding end faces of the two workpieces to be welded are coaxial along the transverse direction; Butting: Control the transverse movement mechanism (40) to drive the first fixture (50) to move along the transverse direction, so that the welding end faces of the two workpieces to be welded are butted; Flash butt welding: Based on preset process parameters, flash butt weld the welding end faces of the two workpieces to be welded to obtain the welded workpiece.

13. The resistance butt welding control method according to claim 12, characterized in that, The resistance flash butt welding device includes a first detection component (710) and a second detection component (720), and the detection directions of the first detection component (710) and the second detection component (720) are both perpendicular to the transverse direction and are set at a preset angle; Between the steps of clamping and centering, the control method further includes: Detection: Based on the first detection component (710) and the second detection component (720), detect the first position deviation of the welding end faces of the two workpieces to be welded along the longitudinal direction and the second position deviation along the vertical direction; and based on the first detection component (710) or the second detection component (720), detect the distance between the welding end faces of the two workpieces to be welded along the transverse direction; The centering step includes: Based on the first position deviation, control the longitudinal adjustment mechanism (20) to drive the second fixture (60) to move along the longitudinal direction, and based on the second position deviation, control the vertical adjustment mechanism (30) to drive the second fixture (60) to move along the vertical direction, so that the welding end faces of the two workpieces to be welded are coaxial along the transverse direction; The butting step includes: Based on the distance, control the transverse movement mechanism (40) to drive the first fixture (50) to move along the transverse direction, so that the welding end faces of the two workpieces to be welded are butted.

14. The method for controlling resistance butt welding according to claim 12, wherein, The resistance flash butt welding device includes a third detection component and a fourth detection component, the detection direction of the third detection component is perpendicular to the transverse direction, and the detection direction of the fourth detection component is parallel to the transverse direction; wherein, the workpiece to be welded clamped by the second fixture (60) has a preset coordinate relationship with the fourth detection component; Between the steps of clamping and centering, the control method further includes: Detection: Based on the third detection component, detect the distance between the welding end faces of the two workpieces to be welded along the transverse direction; and based on the fourth detection component, detect the central coordinates of the welding end face of the workpiece to be welded clamped by the first fixture (50); Calculation: Based on the central coordinates and the preset coordinate relationship, obtain the first position deviation of the welding end faces of the two workpieces to be welded along the longitudinal direction and the second position deviation along the vertical direction; The centering step includes: controlling the longitudinal adjustment mechanism (20) based on the first position deviation to drive the second fixture (60) to move along the longitudinal direction, and controlling the vertical adjustment mechanism (30) based on the second position deviation to drive the second fixture (60) to move along the vertical direction, so that the welding end faces of the two workpieces to be welded are coaxial along the transverse direction; The abutting step includes: controlling the lateral movement mechanism (40) based on the spacing to drive the first fixture (50) to move along the transverse direction, so that the welding end faces of the two workpieces to be welded abut.

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