A sheet metal workpiece welding device and a welding method

Abstract

The present invention relates to a sheet metal workpiece welding device and a welding method. The turntable is used to mount a disc-shaped sheet metal workpiece. The bottom of the threaded column is connected to the center of the turntable. The rotating assembly includes a rotating member, and the rotating member is sleeved outside the threaded column. Each group of support assemblies includes a support block, and the rotating member cooperates with two or more groups of support assemblies so that two or more support blocks are in contact with the inner wall of the cylindrical sheet metal workpiece; the air blowing pipe includes an air blowing head, and the air blowing head is aligned with the turntable or the disc-shaped sheet metal workpiece. The welding machine includes a welding head, and the welding head is aligned with the contact position between the disc-shaped sheet metal workpiece and the cylindrical sheet metal workpiece to weld the disc-shaped sheet metal workpiece and the cylindrical sheet metal workpiece. The technical solution of this application utilizes the gas flow to impact the turntable or the disc-shaped sheet metal workpiece, converts the gas kinetic energy into a rotational torque, and enables the turntable or the disc-shaped sheet metal workpiece to rotate under the action of the air blowing head. Moreover, during the rotation, the welding slag and spatter generated during the welding process can be effectively blown away, avoiding secondary cleaning and improving the welding quality.

Description

Technical Field

[0001] The present invention relates to the technical field of welding tooling, and particularly relates to a sheet metal workpiece welding device and a welding method. Background Art

[0002] Sheet metal workpieces refer to components formed by comprehensively cold working metal sheets (such as steel sheets, aluminum sheets, etc.) with a thickness usually below 6 mm. The core feature is that the thickness of the same part remains consistent. This process includes various processing methods such as shearing, punching, folding, welding, riveting, and splicing.

[0003] When welding a cylindrical sheet metal workpiece and a disc sheet metal workpiece, generally, the workpiece is directly driven to rotate by a motor, and welding is performed while rotating. The welding slag generated during the welding process is difficult to clean up in time, which affects the welding quality. Summary of the Invention

[0004] Therefore, it is necessary to provide a sheet metal workpiece welding device and a welding method to solve the technical problem that when welding a cylindrical sheet metal workpiece and a disc sheet metal workpiece, generally, the workpiece is directly driven to rotate by a motor, and welding is performed while rotating. The welding slag generated during the welding process is difficult to clean up in time, which affects the welding quality.

[0005] To achieve the above object, the present invention provides a sheet metal workpiece welding device, including:

[0006] A workbench;

[0007] A fixing device, the fixing device is installed on the workbench. The fixing device includes a turntable and a fixing mechanism. The turntable is used to install the disc sheet metal workpiece. The center of the turntable corresponds to the center of the disc sheet metal workpiece. The turntable rotates synchronously with the disc sheet metal workpiece. The fixing mechanism is fixedly connected to the turntable. The fixing mechanism is used to concentrically position the cylindrical sheet metal workpiece with the center of the turntable. The fixing mechanism includes a threaded column, a rotating component, and two or more sets of supporting components. The bottom of the threaded column is connected to the center of the turntable. The threaded column extends vertically. The rotating component includes a rotating part. The rotating part is sleeved outside the threaded column. Each set of supporting components includes a supporting block. The rotating part cooperates with two or more sets of supporting components so that two or more supporting blocks are in contact with the inner wall of the cylindrical sheet metal workpiece;

[0008] A welding device, the welding device is installed on the workbench. The welding device includes a blow pipe and a welding machine. The blow pipe includes a blowing head. The blowing head is aligned with the turntable or the disc sheet metal workpiece. The welding machine includes a welding head. The welding head is aligned with the contact position between the disc sheet metal workpiece and the cylindrical sheet metal workpiece to weld the disc sheet metal workpiece and the cylindrical sheet metal workpiece.

[0009] Preferably, the sheet metal workpiece welding equipment further includes more than three positioning posts, which are evenly distributed around the circumference of the turntable and installed on the turntable. The more than three positioning posts are used to position and install the disc-shaped sheet metal workpiece;

[0010] There are more than three sets of support components, and the included angles between two adjacent support components are the same.

[0011] In this way, by setting more than three positioning posts, it is convenient to position and install the disc-shaped sheet metal workpiece, so that the center of the turntable corresponds to the center of the disc-shaped sheet metal workpiece. By setting more than three sets of support components, the cylindrical sheet metal workpiece can be better concentrically positioned with the center of the turntable. Thus, the disc-shaped sheet metal workpiece and the cylindrical sheet metal workpiece are concentrically positioned with the center of the turntable.

[0012] Preferably, the rotating assembly further includes an anti-slip rotating block and more than two extension rods. The bottom of the anti-slip rotating block is connected to the top of the rotating member through the more than two extension rods.

[0013] In this way, by setting more than two extension rods to connect the anti-slip rotating block and the rotating member, the rotating member can rotate while the anti-slip rotating block rotates, which is convenient for manual rotation.

[0014] Preferably, the rotating assembly further includes a motor mounting bracket and a rotating motor. The bottom of the motor mounting bracket is installed on the turntable, the fixed end of the rotating motor is installed on the motor mounting bracket, and the output end of the rotating motor is connected to the rotating member.

[0015] In this way, by setting the rotating motor to drive the rotation of the rotating member, the rotation of the rotating member can be more automatically controlled.

[0016] Preferably, the support assembly further includes a sensing member, which is installed on the support block and is communicatively connected to the rotating motor. The rotating motor moves or stops according to the distance detected by the sensing member between the support block and the inner wall of the cylindrical sheet metal workpiece.

[0017] In this way, by setting the sensing member to be communicatively connected to the rotating motor, the rotation of the rotating motor can be automatically controlled, which is more intelligent and convenient. At the same time, it can also ensure that the support block abuts against the inner wall of the cylindrical sheet metal workpiece in place.

[0018] Preferably, the support assembly further includes a first support column, a rotating rod, a first push rod and a trigger block. The bottom of the first support column is connected to the turntable, the top of the first support column extends in the vertical direction, the rotating rod is hinged to the middle of the first support column, the first push rod is slidably connected to the rotating rod, a trigger block is installed on the side of the first push rod close to the rotating member, and a support block is installed on the other side of the first push rod away from the rotating member.

[0019] In this way, by setting the rotating rod to be hinged to the first push rod, it is convenient to take out the welded disc-shaped sheet metal workpiece and the cylindrical sheet metal workpiece.

[0020] Preferably, the support assembly further includes a connecting rod and a sliding block. One side of the connecting rod is hinged to the rotating member, and the other side of the connecting rod is hinged to the sliding block. A waist-shaped slot is formed in the rotating rod, and the sliding block is installed in the waist-shaped slot and slides in the waist-shaped slot to enable the rotating rod to rotate around the hinge point with the first support column.

[0021] In this way, by setting the cooperation of the connecting rod and the sliding block with the waist-shaped slot, the force of the rotating member moving in the vertical direction is converted into the force of the sliding block moving in the waist-shaped slot, thereby assisting the rotating rod to rotate around the hinge point with the first support column to unfold the support or retract upward.

[0022] Preferably, the support assembly further includes two or more second support columns extending in the vertical direction, a housing, and a second push rod. The bottoms of the two or more support columns are connected to the turntable, the tops of two or more second support columns are connected to the housing, a second push rod is installed in the housing and slides horizontally in the housing. The side of the second push rod close to the rotating member is a trigger inclined surface, the trigger inclined surface cooperates with the rotating member, and a support block is installed on the other side of the second push rod away from the rotating member.

[0023] In this way, the housing is supported by two or more second support columns, and the support is more stable. And the second push rod directly cooperates with the rotating member through the trigger inclined surface, and the structure is simpler.

[0024] Preferably, the fixing device further includes a detection block, a detection sensor, and a display. The detection block is installed on the side of the turntable, the detection sensor is installed on the air blowing head, the detection sensor detects the number of times of the detection block, the display is installed on the side of the turntable, and the display is communicatively connected to the detection sensor, and the display shows the number of rotation circles of the turntable.

[0025] In this way, by setting the detection block, the detection sensor, and the display, the staff can directly observe the number of rotation circles of the turntable, so as to conveniently control the welding progress and improve the welding quality.

[0026] To achieve the above object, the present invention also provides a method for welding sheet metal workpieces, including the sheet metal workpiece welding equipment according to any one of the above provided by the inventor, and further includes the following steps:

[0027] S01: Install the disc-shaped sheet metal workpiece on the turntable so that the center of the disc-shaped sheet metal workpiece corresponds to the center of the turntable, and then place the cylindrical sheet metal workpiece on the disc-shaped sheet metal workpiece;

[0028] S02: Install the fixing mechanism at the corresponding position of the turntable, rotate the rotating member to make the two or more sets of support blocks abut against the inner wall of the cylindrical sheet metal workpiece, so that the cylindrical sheet metal workpiece is concentric with the center of the turntable, and the bottom edge of the cylindrical sheet metal workpiece is in contact with the top edge of the disc sheet metal workpiece;

[0029] S03: Install the air blowing pipe and welding machine on the workbench, align the air blowing head with the turntable and the welding head with the contact point between the disc sheet metal workpiece and the cylindrical sheet metal workpiece. When the air blowing head drives the turntable or the disc sheet metal workpiece to rotate, the cylindrical sheet metal workpiece rotates synchronously, and the welding head welds the contact point between the disc sheet metal workpiece and the cylindrical sheet metal workpiece synchronously to complete the welding.

[0030] Unlike existing technologies, the present invention features a blowpipe with an air inlet that can be connected to an external gas device. The blowpipe is aimed at the turntable or disc-shaped sheet metal workpiece, and the gas flow impacts the workpiece, converting the gas's kinetic energy into rotational torque. The reaction force of the gas flow drives the workpiece to rotate. Furthermore, while the high-speed airflow drives the turntable or disc-shaped sheet metal workpiece, it effectively removes welding slag and spatter generated during welding, eliminating secondary cleaning and improving welding quality.

[0031] The above-mentioned records related to the content of the invention are only an overview of the technical solution of this application. In order to enable ordinary technicians in this field to understand the technical solution of this application more clearly, and then implement it according to the text of the specification and the contents recorded in the drawings, and to make the above-mentioned purposes and other purposes, features and advantages of this application easier to understand, the following is an explanation in combination with the specific implementation methods and drawings of this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, characteristics and effects of the specific embodiments of this application and other related contents, and are not to be considered as limiting this application.

[0033] In the drawings of the specification:

[0034] Figure 1 This is a schematic diagram of the structure of the sheet metal workpiece welding equipment in this application;

[0035] Figure 2 This is a schematic structural diagram of the sheet metal workpiece welding equipment in this application from another perspective;

[0036] Figure 3 for Figure 2 A magnified view of middle A;

[0037] Figure 4 for Figure 2 Enlarged view of middle B;

[0038] Figure 5 Partial cross-sectional view of the fixing device in the present application;

[0039] Figure 6 is Figure 5 an enlarged view of C in;

[0040] Figure 7 Partial structural schematic diagram of the support component in the present application;

[0041] Figure 8 Another partial cross-sectional view of the fixing device in the present application.

[0042] The reference numerals involved in the above-mentioned drawings are explained as follows:

[0043] 1 - Workbench; 2 - Fixing device; 21 - Turntable; 22 - Disc sheet metal workpiece; 23 - Cylindrical sheet metal workpiece; 24 - Fixing mechanism; 241 - Threaded column; 242 - Rotating assembly; 2421 - Rotating sleeve; 2422 - Extrusion block; 2423 - Anti-slip rotating block; 2424 - Extension rod; 2425 - Tapered nut; 2426 - T-shaped block; 243 - Support component; 2430 - Support block; 2431 - First support column; 2432 - Rotating rod; 2433 - First push rod; 2434 - Trigger block; 2435 - Connecting rod; 2436 - Sliding block; 2437 - Waist-shaped groove; 2438 - First groove; 2439 - Second groove; 2441 - Second support column; 2442 - Housing; 2443 - Second push rod; 2444 - Trigger slope; 2445 - Inductive member; 245 - Limit strip; 3 - Welding device; 31 - Blowing pipe; 311 - Blowing head; 32 - Welding machine; 321 - Welding head; 33 - Connecting block; 34 - Fixing frame; 35 - Pressure controller; 4 - Positioning column; Z - Vertical direction; X - Horizontal direction. Detailed implementation manners

[0044] For ease of description, a horizontal direction and a vertical direction are defined. The horizontal direction and the vertical direction are perpendicular to each other. For ease of description, as Figure 1 , Figure 2 , Figure 4 and Figures 6 to 8 indicated by the arrows in, the direction of the arrow X is defined as the horizontal direction, and the direction of the arrow Z is defined as the vertical direction.

[0045] According to some embodiments of the present application, please refer to Figures 1 to 8, the present invention provides a sheet metal workpiece welding device, including a workbench 1, a fixing device 2 and a welding device 3. The fixing device 2 is installed on the workbench 1. The fixing device 2 includes a turntable 21 and a fixing mechanism 24. The turntable 21 is used to install a disc-shaped sheet metal workpiece 22. The center of the turntable 21 corresponds to the center of the disc-shaped sheet metal workpiece 22. The turntable 21 rotates synchronously with the disc-shaped sheet metal workpiece 22. The fixing mechanism 24 is fixedly connected to the turntable 21. The fixing mechanism 24 concentrically positions the cylindrical sheet metal workpiece 23 with the center of the turntable 21. The fixing mechanism 24 includes a threaded column 241, a rotating component 242 and more than two groups of support components 243. The bottom of the threaded column 241 is connected to the center of the turntable 21. The threaded column 241 extends along the vertical direction Z. The rotating component 242 includes a rotating part. The rotating part is sleeved outside the threaded column 241. Each group of support components 243 includes a support block 2430. The rotating part cooperates with more than two groups of support components 243 to make more than two groups of support blocks 2430 abut against the inner wall of the cylindrical sheet metal workpiece 23. The welding device 3 is installed on the workbench 1. The welding device 3 includes a blow pipe 31 and a welding machine 32. The blow pipe 31 includes a blowing head 311. The blowing head 311 is aligned with the turntable 21 or the disc-shaped sheet metal workpiece 22. The welding machine 32 includes a welding head 321. The welding head 321 is aligned with the contact position between the disc-shaped sheet metal workpiece 22 and the cylindrical sheet metal workpiece 23 to weld the disc-shaped sheet metal workpiece 22 and the cylindrical sheet metal workpiece 23.

[0046] The workbench 1 is detachably installed in different working sites. Specifically, two or more threaded holes are provided on both sides of the workbench 1, and it can be installed in different working sites through bolts, studs or screws.

[0047] Such as Figure 2As shown, the fixing device 2 is installed on the workbench 1 and is located at the upper left corner of the workbench 1. The turntable 21 can be installed on the workbench 1 through a rotating shaft, enabling the turntable 21 to rotate relative to the workbench 1. The disc sheet metal workpiece 22 is detachably installed on the turntable 21, facilitating the removal of the welded workpiece from the turntable 21 after subsequent welding. In some embodiments, since the disc sheet metal workpiece 22 is a magnetic metal, it can be installed and positioned by magnetic attraction. Specifically, two or more first magnets are circumferentially and evenly installed on the turntable 21, and the first magnets are magnetically connected and fixed to the disc sheet metal workpiece 22. Thus, disc sheet metal workpieces 22 of different sizes can also be installed on the turntable 21 according to actual situations. Optionally, in addition to circumferentially and evenly installing two or more first magnets on the turntable 21, second magnets corresponding to the first magnets can also be provided at the bottom of the disc sheet metal workpiece 22 to enhance the magnetic attraction. The cylindrical sheet metal workpiece 23 is integrally a hollow cylinder with a certain thickness. The cylindrical sheet metal workpiece 23 is used to be placed on the disc sheet metal workpiece 22, and the outer diameter of the disc sheet metal workpiece 22 is the same as the outer diameter of the disc sheet metal workpiece 22. Under the action of the fixing mechanism 24, the cylindrical sheet metal workpiece 23 can be concentrically positioned with the center of the turntable 21, so that the bottom edge of the cylindrical sheet metal workpiece 23 fits against the top edge of the disc sheet metal workpiece 22.

[0048] The threaded post 241 extends along the vertical direction Z. The bottom of the threaded post 241 can be detachably connected to the center of the turntable 21 by threading or mortise-and-tenon connection or snap connection, etc. Among them, the outer surface of the threaded post 241 can be entirely external threads or partially have external threads (i.e., external threads can be provided in the middle or upper part of the threaded post 241). The rotating member is sleeved on the threaded post. By rotating the rotating member, the support blocks 2430 of two or more support assemblies 243 are brought into contact with the inner wall of the cylindrical sheet metal workpiece 23.

[0049] When two support assemblies can be provided, it is necessary to ensure that the two support assemblies extend along the horizontal direction X, that is, the included angle between the two support assemblies is 180°. Among them, the surface of the support block 2430 in contact with the inner wall of the cylindrical sheet metal workpiece 23 is an arc surface, which can better contact the cylindrical sheet metal workpiece 23.

[0050] The welding machine 32 is an existing welding machine 32, and in this embodiment, the welding machine 32 can be a laser welding machine 32. Among them, the welding head 321 is detachably connected to the main body part of the welding machine 32, and welding heads 321 with different lengths or sizes can be replaced according to different usage scenarios. The main body part of the welding machine 32 can be detachably installed on the workbench 1 through two or more fixing brackets 34. Specifically, after the fixing bracket 34 is erected on the main body part of the welding machine 32, it is installed on the workbench 1 through bolts, studs or screws, so as to facilitate the adjustment of the position of the welding machine 32. Optionally, the welding device 3 further includes a connecting block 33, and the connecting block 33 is snap-connected to the air blowing head 311 and the welding head 321, which is convenient for installation and disassembly. The air inlet of the air blowing pipe 31 is connected to an external gas device, and then the air blowing head 311 blows air to drive the turntable 21 or the disc sheet metal workpiece 22 to rotate. Optionally, the air blowing direction of the air blowing head 311 is set to be tangent to the outer circle of the turntable 21 or the outer circle of the disc sheet metal workpiece 22, and the air flow enters tangentially, which can better drive the turntable 21 or the disc sheet metal workpiece 22 to rotate.

[0051] The technical solution of the present application sets that the air inlet of the air blowing pipe 31 can be connected to an external gas device, the air blowing head 311 is aligned with the turntable 21 or the disc sheet metal workpiece 22, and the gas flow impacts the turntable 21 or the disc sheet metal workpiece 22, converting the gas kinetic energy into a rotational torque, and driving the turntable 21 or the disc sheet metal workpiece 22 to rotate through the air flow reaction force. And while the high-speed air flow drives the turntable 21 or the disc sheet metal workpiece 22 to rotate, it can effectively blow away the welding slag and spatter generated during the welding process, avoid secondary cleaning, and improve the welding quality.

[0052] As Figure 3 shown, the welding device 3 further includes a pressure controller 35, the pressure controller 35 is installed on the air blowing pipe 31, and the pressure controller 35 adjusts the air pressure of the air blowing pipe 31.

[0053] The pressure controller 35 is an existing pressure controller 35, so it will not be elaborated here. By adjusting the air pressure of the air blowing pipe 31 through the pressure controller 35, the rotation speed of the turntable 21 can be flexibly controlled, and the control of the welding process by the staff can be strengthened.

[0054] As Figures 4 to 6 shown, the rotating part includes a rotating sleeve 2421, two or more T-shaped blocks 2426 and two or more pressing blocks 2422. The rotating sleeve 2421 is sleeved on the threaded column 241 and is threadedly connected to the threaded column 241. A T-shaped chute is opened at the bottom of the rotating sleeve 2421. Two or more T-shaped blocks 2426 are evenly arranged around the circumference of the rotating sleeve 2421 in the T-shaped chute and are slidably connected to the T-shaped chute. A pressing block 2422 is installed at the bottom of each T-shaped block 2426, and each pressing block 2422 corresponds to a set of support components 243.

[0055] The inner wall of the rotating sleeve 2421 is provided with internal threads, which are threadedly connected to the threaded column 241. The bottom of the rotating sleeve 2421 is provided with a T-shaped chute, and the T-shaped block is installed in the T-shaped chute. The T-shaped chute can prevent the T-shaped block from falling along the vertical direction Z. Optionally, the T-shaped block 2426 can be integrally formed with the extrusion block 2422, and the installation position of the extrusion block 2422 corresponds to the position of the support assembly 243. Among them, as long as one side of the extrusion block 2422 close to the support assembly 243 is an inclined surface, its cross-section can be trapezoidal, triangular or other irregular shapes, etc. In this embodiment, the cross-section of the extrusion block 2422 is a right-angle extrusion block 2422, that is, one side close to the threaded column 241 is a right-angle surface, and the other side away from the threaded column 241 is an inclined surface. During actual use, the rotating sleeve 2421 can be rotated to move downward along the threaded column 241 in the vertical direction Z. During this process, the T-shaped chute slides relative to the T-shaped block 2426. Therefore, the T-shaped block 2426 will not rotate with the rotating sleeve 2421. At the same time, the T-shaped block 2426 will move downward along the vertical direction Z with the rotating sleeve 2421, driving the extrusion block 2422 to move downward along the vertical direction Z, so that the extrusion block 2422 cooperates with the support assembly 243, and the support block 2430 abuts against the inner wall of the cylindrical sheet metal workpiece 23.

[0056] As Figure 8 shown, the rotating member further includes a tapered nut 2425, which is threadedly connected to the threaded column 241, and the inclined surface of the tapered nut 2425 cooperates with the support assembly 243.

[0057] The inner wall of the tapered nut 2425 has internal threads, which are threadedly connected to the threaded column 241. Since the cross-section of the tapered nut 2425 is an inclined surface, there is no need to additionally provide a T-shaped block 2426 and an extrusion block 2422 to cooperate with the support assembly 243, and the structure is simpler. During actual use, by rotating the tapered nut 2425, the tapered nut 2425 moves downward relative to the threaded column 241 in the vertical direction Z. During this process, even if the tapered nut 2425 rotates, its inclined surface will move along with it in the vertical direction Z, so that the inclined surface of the tapered nut 2425 cooperates with the support assembly 243, and the support block 2430 abuts against the inner wall of the cylindrical sheet metal workpiece 23.

[0058] As Figure 1 、 Figure 2 and Figure 4 shown, the sheet metal workpiece welding device further includes more than three positioning posts 4. More than three positioning posts 4 are evenly arranged around the circumference of the turntable 21 on the turntable 21, and more than three positioning posts 4 are used to position and install the disc sheet metal workpiece 22; there are more than three groups of support assemblies 243, and the included angles between two adjacent support assemblies 243 are the same.

[0059] In this embodiment, three positioning posts 4 are provided. The disc sheet metal workpiece 22 is provided with openings at positions corresponding to the positioning posts 4. While the positioning posts 4 cooperate with the openings to fix the position, they can also assist in positioning. Three groups of support assemblies 243 are provided, and the included angle between two adjacent support assemblies 243 is 120°. The triangular structure is more stable. In some embodiments, four groups, five groups, six groups, etc. of support assemblies 243 can also be provided.

[0060] In this way, by providing more than three positioning posts 4, it is convenient to position and install the disc sheet metal workpiece 22, so that the center of the turntable 21 corresponds to the center of the disc sheet metal workpiece 22. By providing more than three groups of support assemblies 243, the cylindrical sheet metal workpiece 23 can be better concentrically positioned with the center of the turntable 21. Thus, the disc sheet metal workpiece 22 and the cylindrical sheet metal workpiece 23 are concentrically positioned with the center of the turntable 21.

[0061] As Figure 4 shown, the rotating assembly 242 further includes an anti-slip rotating block 2423 and more than two extension rods 2424. The bottom of the anti-slip rotating block 2423 is connected to the top of the rotating part through more than two extension rods 2424.

[0062] The outer surface of the anti-slip rotating block 2423 can be provided with anti-slip patterns, anti-slip gears, anti-slip bumps, etc. Optionally, more than two extension rods 2424 can be evenly arranged at the bottom of the anti-slip rotating block 2423. In this embodiment, as Figure 4 shown, three extension rods 2424 are evenly arranged at the bottom of the anti-slip rotating block 2423, and the bottom of the anti-slip rotating block 2423 is connected to the top of the rotating part through three extension rods 2424. During actual use, the staff rotates the anti-slip rotating block 2423, and then the rotating part rotates along with it through the extension rods 2424.

[0063] In this way, by providing more than two extension rods 2424 to connect the anti-slip rotating block 2423 and the rotating part, the rotating part can rotate while the anti-slip rotating block 2423 rotates, which is convenient for manual rotation.

[0064] In some embodiments, the rotating assembly 242 further includes a motor mounting bracket and a rotating motor. The bottom of the motor mounting bracket is mounted on the turntable 21, the fixed end of the rotating motor is mounted on the motor mounting bracket, and the output end of the rotating motor is connected to the rotating part.

[0065] The bottom of the motor mounting bracket is snap-connected, thread-connected or mortise-and-tenon connected to the turntable 21. The motor mounting bracket is used to mount the rotating motor. Among them, the rotating motor can rotate forward and backward. Optionally, a remote control is provided and communicatively connected to the rotating motor, and the rotating motor can be controlled to rotate through the remote control, which is more intelligent and convenient.

[0066] In this way, by setting the rotation motor to drive the rotating member to rotate, the rotation of the rotating member can be controlled more automatically.

[0067] As Figure 5 shown, the support assembly 243 further includes a sensing member 2445. The sensing member 2445 is installed on the support block 2430. The sensing member 2445 is communicatively connected to the rotation motor. The rotation motor moves or stops moving according to the distance detected by the sensing member 2445 between the support block 2430 and the inner wall of the cylindrical sheet metal workpiece 23.

[0068] The sensing member 2445 can be a position sensor, a camera, a proximity switch, etc., to detect the movement or stop of the distance between the support block 2430 and the inner wall of the cylindrical sheet metal workpiece 23. When the sensing member 2445 detects that the distance between the support block 2430 and the inner wall of the cylindrical sheet metal workpiece 23 does not reach the preset specified distance, the rotation motor is still moving until the sensing member 2445 detects that the distance between the support block 2430 and the inner wall of the cylindrical sheet metal workpiece 23 reaches the preset specified distance, that is, when the support block 2430 abuts against the inner wall of the cylindrical sheet metal workpiece 23, the rotation motor stops moving.

[0069] In this way, by setting the sensing member 2445 to be communicatively connected to the rotation motor, the stop movement of the rotation motor can be automatically controlled, which is more intelligent and convenient. At the same time, it can also ensure that the support block 2430 abuts against the inner wall of the cylindrical sheet metal workpiece 23 in place.

[0070] In some embodiments, the support assembly 243 further includes an alarm. The alarm is communicatively connected to the sensing member 2445. The alarm issues an alarm according to the distance detected by the sensing member 2445 between the support block 2430 and the inner wall of the cylindrical sheet metal workpiece 23.

[0071] When the sensing member 2445 detects that the distance between the support block 2430 and the inner wall of the cylindrical sheet metal workpiece 23 reaches the preset specified distance, that is, when the support block 2430 abuts against the inner wall of the cylindrical sheet metal workpiece 23, the alarm issues an alarm to prompt the staff to stop rotating the rotating member.

[0072] In this way, by setting the alarm, it can be ensured that the support block 2430 abuts against the inner wall of the cylindrical sheet metal workpiece 23 in place. At the same time, when manual assistance is needed to rotate the rotating member, it can also prompt the workers that the rotation is in place.

[0073] As Figure 4 and Figure 5As shown, the support assembly 243 further includes a first support column 2431, a rotating rod 2432, a first push rod 2433, and a trigger block 2434. The bottom of the first support column 2431 is connected to the turntable 21, and the top of the first support column 2431 extends along the vertical direction Z. The rotating rod 2432 is hinged to the middle of the first support column 2431. A first push rod 2433 is slidably connected to the rotating rod 2432. A trigger block 2434 is installed on one side of the first push rod 2433 close to the ladder rotating member, and a support block 2430 is installed on the other side of the first push rod 2433 away from the rotating member.

[0074] The first push rod 2433, the trigger block 2434, and the support block 2430 can be integrally formed. Optionally, the support block 2430 is detachably connected to the first push rod 2433, which is convenient for replacing the support block 2430 with different arc lengths or radian according to different cylindrical sheet metal workpieces 23. Optionally, a first groove 2438 is opened inside the rotating rod 2432. The first support column 2431 is located inside the first groove 2438. The bottom of the first support column 2431 is clamped or threadedly connected or tenoned to the turntable 21, which is convenient for disassembly. The middle of the first support column 2431 is hinged to the rotating rod 2432 through a rotating column at the position of the first groove 2438. The first push rod 2433 is provided with a second groove 2439 at the corresponding position of the first groove 2438, so that the first support column 2431 can pass through the second groove 2439 and extend along the vertical direction Z.

[0075] When the rotating member includes a rotating sleeve 2421, more than two T-shaped blocks 2426, and more than two extrusion blocks 2422, a slanted groove matching with the extrusion block 2422 is opened on one side of the trigger block 2434, that is, a slanted groove is opened on the side of the trigger block 2434 close to the threaded column 241. The extrusion block 2422 is clamped into the slanted groove, and the slanted groove can limit the extrusion block 2422 to move only along the vertical direction Z. When the rotating member includes a tapered nut 2425, one side of the trigger block 2434 is a slope matching with the tapered nut 2425, that is, the side of the trigger block 2434 close to the threaded column 241 is a slope.

[0076] In actual use, the rotating member can be manually adjusted to a suitable position on the threaded column 241 first, and then the rotating rod 2432 is manually rotated counterclockwise around the hinge point with the first support column 2431 to the horizontal direction X so that the trigger block 2434 contacts the lower end of the rotating member. At this time, the rotating rod 2432 will abut against the side of the first support column 2431 close to the threaded column 241. Therefore, the rotating rod 2432 cannot be rotated counterclockwise any more, and its rotation angle is limited. After that, by rotating the rotating member clockwise (i.e., rotating the rotating sleeve 2421 or the tapered nut 2425), the rotating member moves downward along the vertical direction Z. The rotating member (i.e., the inclined surface of the pressing block 2422 or the inclined surface of the tapered nut 2425) pushes the trigger block 2434. During this process, the length of the rotating member along the horizontal direction X gradually becomes longer. Therefore, the trigger block 2434 can be pushed. The trigger block 2434 then pushes the first push rod 2433 to slide on the rotating rod 2432. The first push rod 2433 pushes the support block 2430 along the horizontal direction X until the support block 2430 abuts against the inner wall of the cylindrical sheet metal workpiece 23. When the workpiece needs to be taken out after welding, the rotating member needs to be rotated counterclockwise (i.e., rotating the rotating sleeve 2421 or the tapered nut 2425) to move the rotating member upward along the vertical direction Z, cancel the extrusion of the trigger block 2434, and then manually reset the first push rod 2433 so that the support block 2430 does not abut against the inner wall of the cylindrical sheet metal workpiece 23. After that, manually rotate the rotating rod 2432 clockwise relative to the first support column 2431 until the length of the rotating rod 2432 along the horizontal direction X is less than the inner circle of the cylindrical sheet metal workpiece 23, and then the staff can take out the welded workpiece on the turntable 21.

[0077] In this way, by arranging the hinge connection between the rotating rod 2432 and the first push rod 2433, it is convenient to take out the welded disc sheet metal workpiece 22 and the cylindrical sheet metal workpiece 23.

[0078] As Figure 4 and Figure 7 As shown, the support assembly 243 further includes a connecting rod 2435 and a sliding block 2436. One side of the connecting rod 2435 is hinged to the rotating member, and the other side of the connecting rod 2435 is hinged to the sliding block 2436. A waist-shaped groove 2437 is formed on the rotating rod 2432. The sliding block 2436 is installed in the waist-shaped groove 2437 and slides in the waist-shaped groove 2437 to make the rotating rod 2432 rotate around the hinge point with the first support column 2431.

[0079] The cross section of the sliding block 2436 can be circular, and a waist-shaped groove 2437 is formed on the front surface of the rotating rod 2432. The dimensions of the connecting rod 2435 and the waist-shaped groove 2437 need to ensure that when the rotating rod 2432 rotates to the horizontal direction X, the sliding block 2436 still slides in the waist-shaped groove 2437 in the direction close to the support block 2430.

[0080] In actual use, when the rotating member is rotated clockwise, the connecting rod 2435 will move downward along the vertical direction Z with the rotating member, and the sliding block 2436 will slide in the kidney-shaped groove 2437 towards the support block 2430, causing the rotating rod 2432 to rotate counterclockwise around the hinge point with the first support column 2431 to the horizontal direction X. When the rotating member is rotated counterclockwise, the connecting rod 2435 will move upward along the vertical direction Z with the rotating member, and the sliding block 2436 will slide in the kidney-shaped groove 2437 away from the support block 2430, causing the rotating rod 2432 to rotate clockwise around the hinge point with the first support column 2431 until the length of the support assembly 243 along the horizontal direction X is less than the inner circle of the cylindrical sheet metal workpiece 23.

[0081] In this way, by setting the cooperation of the connecting rod 2435 and the sliding block 2436 with the kidney-shaped groove 2437, the force of the rotating member moving along the vertical direction Z is converted into the force of the sliding block 2436 moving in the kidney-shaped groove 2437, thereby assisting the rotating rod 2432 to rotate around the hinge point with the first support column 2431 to expand the support or retract upward.

[0082] In some embodiments, as Figure 5 shown, two limiting bars 245 can also be used to replace the connecting rod 2435. The two limiting bars 245 are arranged at intervals along the vertical direction Z. One side of the two limiting bars 245 is hinged to the rotating member, and a sliding block 2436 is arranged between the two limiting bars 245, and the sliding block 2436 slides in the kidney-shaped groove 2437.

[0083] As Figure 8 shown, the support assembly 243 further includes two or more second support columns 2441 extending along the vertical direction Z, a housing 2442, and a second push rod 2443. The bottoms of the two or more second support columns 2441 are connected to the turntable 21, the tops of the two or more support columns are connected to the housing 2442, the second push rod 2443 is installed in the housing 2442 and slides along the horizontal direction X in the housing 2442. The side of the second push rod 2443 close to the rotating member is a trigger inclined surface 2444, and the trigger inclined surface 2444 cooperates with the rotating member. A support block 2430 is installed on the other side of the second push rod 2443 away from the rotating member.

[0084] The length of the housing 2442 along the horizontal direction X is less than the radius of the inner circle of the cylindrical sheet metal workpiece 23. The bottoms of the two or more second support columns 2441 are snap-connected or thread-connected or tenon-mortise-connected to the turntable 21, which is convenient for disassembly. In this embodiment, two second support columns 2441 are provided to support the housing 2442. The second push rod 2443 can be integrally formed with the support block 2430, or the support block 2430 can be detachably connected to the second push rod 2443, which is convenient for replacing the support block 2430 with different arc lengths or radian according to different cylindrical sheet metal workpieces 23.

[0085] During actual use, the staff rotates the rotating member clockwise (i.e., rotates the rotating sleeve 2421 or the tapered nut 2425). The rotating member (i.e., the inclined surface of the pressing block 2422 or the inclined surface of the tapered nut 2425) cooperates with the triggering inclined surface 2444 to push the second push rod 2443 to move horizontally in the X direction close to the cylindrical sheet metal workpiece 23 until the support block 2430 abuts against the inner wall of the cylindrical sheet metal workpiece 23. When the workpiece needs to be taken out after welding, the rotating member needs to be rotated counterclockwise to cancel the cooperation with the triggering inclined surface 2444, and then the second push rod 2443 is manually moved towards the threaded column 241 until the length of the second push rod 2443 in the horizontal direction X is less than the inner circle of the cylindrical sheet metal workpiece 23. Then the staff can take out the welded workpiece on the turntable 21.

[0086] In this way, the housing 2442 is supported by two or more second support columns 2441, and the support is more stable. And the second push rod 2443 is directly matched with the rotating member through the triggering inclined surface 2444, and the structure is simpler.

[0087] In some embodiments, the fixing device further includes a detection block, a detection sensor and a display. The detection block is installed on the side of the turntable 21, the detection sensor is installed on the air blowing head 311, the detection sensor detects the number of times of the detection block, the display is installed on the side of the turntable 21, and the display is communicatively connected with the detection sensor. The display shows the number of rotation turns of the turntable 21.

[0088] When the number of times the detection sensor detects the detection block is N, the number of rotation turns of the turntable 21 displayed by the display is N - 1 turns. For example: when N = 2, the turntable 21 rotates 1 turn. Optionally, an external gas device and a welding machine 32 are also communicatively connected with the detection sensor. Thus, it can be set that when the number of rotation turns of the turntable 21 reaches a preset number of turns (such as 1 turn), the air blowing head 311 stops blowing air and the welding machine 32 stops welding, so as to avoid over-welding of the workpiece and affect the welding quality.

[0089] In this way, by setting the detection block, the detection sensor and the display, the staff can conveniently directly observe the number of rotation turns of the turntable 21, so as to conveniently control the welding progress and improve the welding quality.

[0090] According to some embodiments of the present application, the present invention also provides a method for welding sheet metal workpieces, including a sheet metal workpiece welding device, and further including the following steps:

[0091] S01: Install the disc sheet metal workpiece 22 on the turntable 21 so that the center of the disc sheet metal workpiece 22 corresponds to the center of the turntable 21, and then place the cylindrical sheet metal workpiece 23 on the disc sheet metal workpiece 22;

[0092] S02: Install the fixing mechanism 24 at the corresponding position on the turntable 21. Rotate the rotating member to make more than two sets of supporting blocks 2430 abut against the inner wall of the cylindrical sheet metal workpiece 23, so that the cylindrical sheet metal workpiece 23 is concentrically positioned with the center of the turntable 21, and the bottom edge of the cylindrical sheet metal workpiece 23 is attached to the top edge of the disc sheet metal workpiece 22.

[0093] S03: Install the blow pipe 31 and the welding machine 32 on the workbench 1, align the blowing head 311 with the turntable 21 and the welding head 321 with the contact between the disc sheet metal workpiece 22 and the cylindrical sheet metal workpiece 23. While the blowing head 311 blows air to drive the turntable 21 or the disc sheet metal workpiece 22 to rotate, the cylindrical sheet metal workpiece 23 rotates synchronously, and the welding head 321 synchronously welds the contact between the disc sheet metal workpiece 22 and the cylindrical sheet metal workpiece 23 to complete the welding.

[0094] After step S03, it further includes step S04: Rotate the rotating member to cancel the abutment of more than two sets of supporting blocks 2430 against the inner wall of the cylindrical sheet metal workpiece 23. Then, after the length of more than two sets of supporting components 243 along the horizontal direction X is less than the inner circle of the cylindrical sheet metal workpiece 23, take out the welded workpiece from the turntable 21. After step S04, it further includes step S05: Repeat steps S01 to S04 for the new disc sheet metal workpiece 22 and the new cylindrical sheet metal workpiece 23.

[0095] In S01, it should be emphasized that the disc sheet metal workpiece 22 is installed on the turntable 21 through more than three positioning posts 4, so that the center of the disc sheet metal workpiece 22 corresponds to the center of the turntable 21. Then, place the cylindrical sheet metal workpiece 23 on the disc sheet metal workpiece 22, and try to make the bottom edge of the cylindrical sheet metal workpiece 23 attach to the top edge of the disc sheet metal workpiece 22.

Claims

1. A sheet metal workpiece welding device, characterized in that Comprising: Workbench; Fixing device, the fixing device is installed on the workbench, the fixing device includes a turntable and a fixing mechanism, the turntable is used for installing a disc-shaped sheet metal workpiece, the center of the turntable corresponds to the center of the disc-shaped sheet metal workpiece, the turntable rotates synchronously with the disc-shaped sheet metal workpiece, the fixing mechanism is fixedly connected to the turntable, the fixing mechanism is used for concentrically positioning the cylindrical sheet metal workpiece with the center of the turntable, the fixing mechanism includes a threaded column, a rotating component and more than two groups of supporting components, the bottom of the threaded column is connected to the center of the turntable, the threaded column extends along the vertical direction, the rotating component includes a rotating part, the rotating part is sleeved outside the threaded column, each group of the supporting components includes a supporting block, the rotating part cooperates with more than two groups of the supporting components so that more than two groups of the supporting blocks are in contact with the inner wall of the cylindrical sheet metal workpiece; Welding device, the welding device is installed on the workbench, the welding device includes a blow pipe and a welding machine, the blow pipe includes a blowing head, the blowing head is aligned with the turntable or the disc-shaped sheet metal workpiece, the welding machine includes a welding head, the welding head is aligned with the contact position between the disc-shaped sheet metal workpiece and the cylindrical sheet metal workpiece to weld the disc-shaped sheet metal workpiece and the cylindrical sheet metal workpiece.

2. The sheet metal workpiece welding equipment according to claim 1, wherein, The sheet metal workpiece welding equipment further includes more than three positioning posts, and more than three positioning posts are evenly distributed around the circumference of the turntable and installed on the turntable, and more than three positioning posts are used for positioning and installing the disc-shaped sheet metal workpiece; There are more than three groups of the supporting components, and the included angles between two adjacent supporting components are the same.

3. The sheet metal workpiece welding device according to claim 1, characterized in that The rotating component further includes an anti-slip rotating block and more than two extension rods, and the bottom of the anti-slip rotating block is connected to the top of the rotating part through more than two extension rods.

4. The sheet metal workpiece welding equipment according to claim 1, characterized in that, The rotating component further includes a motor mounting bracket and a rotating motor, the bottom of the motor mounting bracket is installed on the turntable, the fixed end of the rotating motor is installed on the motor mounting bracket, and the output end of the rotating motor is connected to the rotating part.

5. The sheet metal workpiece welding equipment according to claim 4, characterized in that The supporting component further includes a sensing part, the sensing part is installed on the supporting block, the sensing part is in communication connection with the rotating motor, and the rotating motor moves or stops moving according to the distance detected by the sensing part between the supporting block and the inner wall of the cylindrical sheet metal workpiece.

6. The sheet metal workpiece welding equipment according to any one of claims 1 to 5, characterized in that The supporting component further includes a first support column, a rotating rod, a first push rod and a trigger block, the bottom of the first support column is connected to the turntable, the top of the first support column extends along the vertical direction, the rotating rod is hinged to the middle of the first support column, the first push rod is slidably connected to the rotating rod, the trigger block is installed on the side of the first push rod close to the rotating part, and the supporting block is installed on the other side of the first push rod away from the rotating part.

7. The sheet metal workpiece welding equipment according to claim 6, characterized in that, The support assembly further includes a connecting rod and a sliding block. One side of the connecting rod is hinged to the rotating member, and the other side of the connecting rod is hinged to the sliding block. A waist-shaped slot is formed in the rotating rod, and the sliding block is installed in the waist-shaped slot and slides in the waist-shaped slot so that the rotating rod rotates around the hinge point with the first support column.

8. The sheet metal workpiece welding equipment according to any one of claims 1 to 5, characterized in that, The support assembly further includes two or more second support columns extending in the vertical direction, a housing, and a second push rod. The bottoms of the two or more support columns are connected to the turntable, and the tops of the two or more second support columns are connected to the housing. The second push rod is installed in the housing and slides horizontally in the housing. The side of the second push rod close to the rotating member is a trigger inclined surface, and the trigger inclined surface cooperates with the rotating member. A support block is installed on the other side of the second push rod away from the rotating member.

9. The sheet metal workpiece welding equipment according to claim 1, characterized in that, The fixing device further includes a detection block, a detection sensor, and a display. The detection block is installed on the side of the turntable, the detection sensor is installed on the air blowing head, the detection sensor detects the number of times of the detection block, the display is installed on the side of the turntable, and the display is communicatively connected to the detection sensor. The display shows the number of rotation circles of the turntable.

10. A welding method for sheet metal workpieces, characterized in that, It includes the sheet metal workpiece welding equipment according to any one of claims 1 to 9, and further includes the following steps: S01: Install the disc sheet metal workpiece on the turntable so that the center of the disc sheet metal workpiece corresponds to the center of the turntable, and then place the cylindrical sheet metal workpiece on the disc sheet metal workpiece; S02: Install the fixing mechanism at the corresponding position of the turntable, rotate the rotating member so that two or more groups of support blocks abut against the inner wall of the cylindrical sheet metal workpiece, so that the cylindrical sheet metal workpiece is concentrically positioned with the center of the turntable, and the bottom edge of the cylindrical sheet metal workpiece fits with the top edge of the disc sheet metal workpiece; S03: Install the blow pipe and the welding machine on the workbench so that the air blowing head is aligned with the turntable and the welding head is aligned with the contact portion between the disc sheet metal workpiece and the cylindrical sheet metal workpiece. While the air blowing head blows air to drive the turntable or the disc sheet metal workpiece to rotate, the cylindrical sheet metal workpiece rotates synchronously, and the welding head synchronously welds the contact portion between the disc sheet metal workpiece and the cylindrical sheet metal workpiece to complete the welding.

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