A laser welding device for open-close tool joint

Abstract

The application discloses a kind of open and closed tool joint laser welding devices, the rack top is fixed with table plate, the rear side of the table plate is installed with three-axis motion slide, the slide of the three-axis motion slide is installed with laser welding module, the left side of the three-axis motion slide is installed with pneumatic module, the left side of the table plate top is installed with the clamping assembly for clamping workpiece, the right side of the clamping assembly is provided with jacking assembly, the table plate top is rotatably installed with shading structure, the shading structure is in the front side of jacking assembly, and shading structure and jacking assembly are slidably connected, clamping assembly includes upper seat, lower seat and workpiece sleeve three components, upper seat can be opened according to the need under the action of open-close cylinder, in turn can take out workpiece sleeve, so that pipe fitting can be fixed in workpiece sleeve again after installation, suitable for longer pipe fitting with side wall being blocked by other objects equipment.

Description

Technical Field

[0001] The present invention relates to the field of welding technology, and in particular to an opening and closing type tool joint laser welding device. Background Art

[0002] Currently, laser welding is used when welding pipe fittings to flanges. The laser welding device generally includes a clamping fixture for fixing the pipe fitting. Another clamping device is also set opposite the workpiece, and the clamping device can slide back and forth left and right. The clamping fixture generally includes a fixture seat, in which a drive sleeve is rotatably installed. The drive sleeve is connected to the drive device, and a three-jaw chuck for clamping the workpiece is installed on the drive sleeve. During welding, the pipe fitting is horizontally inserted into the drive sleeve and the three-jaw chuck and clamped and fixed by the three-jaw chuck. At the same time, the flange is fixed to the clamping device. Before welding, the two are abutted against each other, and then welding can be carried out. Because the left and right sliding distance of the clamping device is limited, when the pipe fitting to be welded is long, even if the clamping device is moved to the maximum distance, the pipe fitting will be interfered with by the clamping device when it is pulled out from one side of the clamping device.

[0003] At the same time, strong bright light is usually generated during welding. When this bright light shines on the skin, there will be no reaction at the beginning, but after a period of time, the skin will become red and swollen. During welding, a protective plate is required to be set on the front side for protection. The existing protective plate is usually set as a push-pull structure. This structure needs to be manually moved to the welding site for shielding during welding. In some welding operations, the protective plate may not be used for shielding due to carelessness of the workers. Summary of the Invention

[0004] The present invention provides an opening and closing type tool joint laser welding device, which solves the above-mentioned problem.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A laser welding device for an opening and closing tool joint comprises a frame, a table fixed above the frame, a three-axis motion slide mounted on the rear side above the table, a laser welding module mounted on the slide of the three-axis motion slide, a pneumatic module mounted on the left side of the three-axis motion slide, a clamping assembly for clamping a workpiece mounted on the left side above the table, a lifting assembly disposed on the right side of the clamping assembly, a light shielding structure rotatably mounted above the table, the light shielding structure being located in front of the lifting assembly and being slidably connected to the lifting assembly;

[0007] An opening is provided on the left side above the table, and the clamping assembly includes a lower closing seat, on which a workpiece sleeve is rotatably placed, a bevel gear 1 being welded to the outer ring of the workpiece sleeve, a left three-jaw chuck being fixed to the right end of the workpiece sleeve, and a driving device being installed below the table, which is connected to the bevel gear 1;

[0008] An opening and closing cylinder is rotatably mounted below the table plate through an axle pin and an axle seat. A push rod of the opening and closing cylinder passes through the table plate and is placed above the table plate. The end of the push rod of the opening and closing cylinder is rotatably connected to a universal shaft. An upper closing seat is rotatably mounted above the lower closing seat. The rear end of the upper closing seat is rotatably connected to the universal shaft through an axle pin.

[0009] The lower closing seat includes a lower left seat and a lower right seat fixed on the table plate, the lower halves of the lower left seat and the lower right seat pass through the opening and are located below the table plate, a gap is left between the lower left seat and the lower right seat, and a lower arc opening is provided above the lower left seat and the lower right seat, a deflection shaft is provided at the rear end of the lower right seat, a hinge hole is opened and closed on the upper closing seat, the upper closing seat is rotatably connected to the lower right seat through the deflection shaft and the hinge hole, and an upper arc opening is provided below the upper closing seat;

[0010] The upper arc opening and the lower arc opening are both semicircular structures, and the combination of the two constitutes a complete circular structure, and the inner diameter of the circular structure is the same as the outer diameter of the workpiece sleeve;

[0011] The driving device includes a helical gear 2 that is rotatably installed in the gap between the lower left seat and the lower right seat through a rotating shaft and a bearing. The helical gear 2 is meshed with the helical gear 1. A driving motor is installed on the right side of the lower right seat. The output shaft of the driving motor is connected to the rotating shaft through a coupling. The driving motor is installed under the table through a bracket. The rotation of the driving motor can rotate the helical gear 2, and then rotate the helical gear 1 through the helical gear 2. The rotating helical gear 1 will drive the left three-jaw chuck and the workpiece sleeve to rotate, so that the workpiece can be annularly welded.

[0012] Preferably, the pneumatic module includes a fixing frame fixed above the table, an adjusting cylinder is installed above the fixing frame, a fixing head is fixed on the push rod of the adjusting cylinder, an adjusting rod is inserted on the fixing head for sliding left and right, an adjusting block is fixed on the adjusting rod, an air pipe is fixed on the adjusting block, the rear end of the air pipe is connected to an external blowing and exhausting dual-purpose pump through a hose, the air pipe can suck air during welding, thereby sucking away the smoke generated during welding, and the air pipe can blow out airflow after welding is completed, so that the pipe can be cooled quickly after welding.

[0013] Preferably, the jacking assembly includes two groups of parallel linear rails fixed with screws above the table, and linear sliders are slidably installed on the linear rails, wherein a jacking seat is fixed on the rear side of the linear slider, and a right three-jaw chuck is rotatably installed on the right side of the jacking seat, and a jacking cylinder is fixed above the table through a bracket, and the push rod of the jacking cylinder is connected to the jacking seat. The extension and contraction of the push rod of the jacking cylinder can make the jacking seat move left and right along the linear rails, thereby making the flange fixed on the right three-jaw chuck move to the left, and abut against the pipe fixed on the left three-jaw chuck and perform laser welding. The position of the flange on the right three-jaw chuck can be adjusted left and right, which is suitable for welding pipes of various lengths.

[0014] Preferably, the central axis of the right three-jaw chuck is collinear with the central axis of the left three-jaw chuck, and the central axis of the left three-jaw chuck is collinear with the central axis of the workpiece sleeve. The axis of the pipe clamped and fixed on the left three-jaw chuck can be collinear with the flange clamped on the right three-jaw chuck. There will be no positional offset between the two when they are docked, thereby improving the subsequent welding accuracy.

[0015] Preferably, the shading structure includes a shading plate, a rotating shaft is fixed below the shading plate, two groups of connecting shaft seats are symmetrically fixed on the left and right sides above the table, and shafts are integrally formed at the left and right ends of the rotating shaft, and the left and right shafts are respectively rotatably connected to the two connecting shaft seats, and a torsion spring is respectively sleeved on the left and right ends of the rotating shaft, one end of the torsion spring is connected to the connecting shaft seat, and the other end of the torsion spring is connected to the shading plate, and the torsion spring makes the shading plate always have a tendency to deflect toward the side away from the lifting seat, and a deflection member is provided on the rotating shaft, and a driving member is fixed on the two linear sliders, and the driving member is in rolling contact with the deflection member.

[0016] Preferably, the deflection member includes a rotating portion welded to the outer ring of the rotating shaft, the rotating portion is a spiral plate, the leftmost end of the rotating portion is extended to form a straight portion, the driving member includes a driving frame fixed to two linear sliders, the driving frame is an L-shaped structure, and a driving wheel is rotatably mounted on the front end of the driving frame through an axle pin, and the driving wheel is in rolling contact with the deflection member;

[0017] A placement slot is provided on the table, and the placement slot is placed below the deflection member, and the length and width of the placement slot are greater than the length and width of the deflection member.

[0018] Preferably, when the shading plate and the table are in a vertical state, the rightmost end of the rotating portion is vertically downward, the leftmost end of the rotating portion is designed to be parallel to the upper surface of the table, and the straight portion is designed to be parallel to the upper surface of the table;

[0019] When the shielding plate is parallel to the table, the rightmost end of the rotating portion is parallel to the upper surface of the table, and the leftmost end of the rotating portion and the straight portion are vertically upward.

[0020] Beneficial effects of the present invention:

[0021] 1. By setting a clamping assembly above the table and cooperating with the jacking assembly, the clamping assembly can quickly clamp and fix the pipe fittings, and the jacking assembly can quickly clamp and fix the flange, so that the two can be quickly docked, which is convenient for subsequent welding. The clamping assembly consists of three parts: the upper closing seat, the lower closing seat and the workpiece sleeve. The upper closing seat can be opened as needed under the action of the opening and closing cylinder, and the workpiece sleeve can be taken out. In this way, after the pipe fitting is welded, even if the pipe fitting is long as a whole, the welded workpiece can be quickly taken out, thereby improving the welding efficiency.

[0022] 2. By rotating and installing the shading plate on the table, the shading plate is linked to the jacking assembly through the deflection member and the driving member. When the jacking assembly is docking the clamping flange and the pipe fitting, it can ensure that the shading plate is erected and shielded. The light generated during welding will not directly hit the workers' eyes, thereby improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a front view of an opening and closing type tool joint laser welding device proposed by the present invention;

[0024] Figure 2 for Figure 1 A left and right isometric view of a laser welding device for an opening and closing tooling joint;

[0025] Figure 3 for Figure 2 Schematic diagram of the structure of the center plate, pneumatic module, clamping assembly, lifting assembly, and shading structure;

[0026] Figure 4 for Figure 3 Schematic diagram of the structure of the pneumatic module;

[0027] Figure 5 for Figure 3 Exploded view of the clamping assembly;

[0028] Figure 6 for Figure 2 The upper and lower isometric drawings;

[0029] Figure 7 for Figure 2 Schematic diagram of the structure with the middle jacking assembly at the far right end and the rear shading structure lying flat;

[0030] Figure 8 for Figure 2 Exploded view of the shielding structure and driving parts.

[0031] Numbers in the figure: 1, frame; 2, table; 21, placement slot; 3, three-axis motion slide; 4, laser welding module; 5, pneumatic module; 51, fixed frame; 52, adjustment cylinder; 53, fixed head; 54, adjustment rod; 55, adjustment block; 56, air pipe; 6, clamping assembly; 61, upper closing seat; 611, upper arc opening; 62, opening and closing cylinder; 63, lower right seat; 631, deflection axis; 632, hinge hole; 64, lower left seat; 641, lower arc opening; 65, bevel gear Wheel one; 66. Workpiece sleeve; 67. Left three-jaw chuck; 68. Bevel gear two; 69. Drive motor; 7. Lifting assembly; 71. Lifting cylinder; 72. Lifting seat; 721. Linear slider; 722. Linear rail; 73. Right three-jaw chuck; 74. Drive member; 741. Drive frame; 742. Drive wheel; 8. Shading structure; 81. Shading plate; 82. Rotating shaft; 83. Deflection member; 831. Rotating part; 832. Linear part; 84. Torsion spring; 85. Connecting shaft seat. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0033] Reference Figures 1-8 A laser welding device for an opening and closing tooling joint includes a frame 1, a table 2 is fixed above the frame 1, a three-axis motion slide 3 is installed on the rear side above the table 2, a laser welding module 4 is installed on the slide of the three-axis motion slide 3, a pneumatic module 5 is installed on the left side of the three-axis motion slide 3, a clamping assembly 6 for clamping a workpiece is installed on the left side above the table 2, a lifting assembly 7 is provided on the right side of the clamping assembly 6, a light shielding structure 8 is rotatably installed above the table 2, the light shielding structure 8 is located in front of the lifting assembly 7, and the light shielding structure 8 is slidably connected to the lifting assembly 7;

[0034] An opening is provided on the left side above the table 2. The clamping assembly 6 includes a lower closing seat, on which a workpiece sleeve 66 is rotatably placed. A bevel gear 65 is welded to the outer ring of the workpiece sleeve 66. A left three-jaw chuck 67 is fixed to the right end of the workpiece sleeve 66. A driving device is installed below the table 2 and is connected to the bevel gear 65.

[0035] An opening and closing cylinder 62 is rotatably mounted below the table 2 through an axle pin and an axle seat. The upper end of the push rod of the opening and closing cylinder 62 passes through the table 2 and is placed above the table 2. The end of the push rod of the opening and closing cylinder 62 is rotatably connected to a universal shaft. An upper closing seat 61 is rotatably mounted above the lower closing seat. The rear end of the upper closing seat 61 is rotatably connected to the universal shaft through an axle pin.

[0036] The lower closing seat includes a lower left seat 64 and a lower right seat 63 fixed on the table 2. The lower halves of the lower left seat 64 and the lower right seat 63 pass through the opening and are located below the table 2. A gap is left between the lower left seat 64 and the lower right seat 63, and a lower arc opening 641 is provided above the lower left seat 64 and the lower right seat 63. A deflection shaft 631 is provided at the rear end of the lower right seat 63. A hinge hole 632 is opened and closed on the upper closing seat 61. The upper closing seat 61 is rotatably connected to the lower right seat 63 through the deflection shaft 631 and the hinge hole 632. An upper arc opening 611 is provided below the upper closing seat 61.

[0037] The upper arc opening 611 and the lower arc opening 641 are both semicircular structures, and the combination of the two constitutes a complete circular structure, and the inner diameter of the circular structure is the same as the outer diameter of the workpiece sleeve 66. When the push rod of the opening and closing cylinder 62 contracts, the upper closing seat 61 can be deflected upward with the deflection axis 631 as the axis, and the front end of the upper closing seat 61 is lifted. At this time, the workpiece sleeve 66 can be directly placed in the lower arc opening 641, and the bevel gear 1 65 can be placed in the gap between the lower left seat 64 and the lower right seat 63. After that, the push rod of the opening and closing cylinder 62 is extended to make the upper closing seat 61 deflect downward with the deflection axis 631 as the axis pin, and the front end of the upper closing seat 61 is pressed on the lower closing seat, and the workpiece sleeve 66 is between the upper arc opening 611 and the lower arc opening 641, and the workpiece sleeve 66 can be quickly disassembled or installed;

[0038] The driving device includes a bevel gear 2 68 which is rotatably installed in the gap between the lower left seat 64 and the lower right seat 63 through a rotating shaft and a bearing. The bevel gear 2 68 is engaged with the bevel gear 1 65. A driving motor 69 is installed on the right side of the lower right seat 63. The output shaft of the driving motor 69 is connected to the rotating shaft on the bevel gear 2 68 through a coupling. The driving motor 69 is installed under the table 2 through a bracket. The rotation of the driving motor 69 can rotate the bevel gear 2 68, and then drive the bevel gear 1 65 to rotate through the bevel gear 2 68. The rotating bevel gear 1 65 will drive the left three-jaw chuck 67 and the workpiece sleeve 66 to rotate, so that the workpiece can be annularly welded.

[0039] The pneumatic module 5 includes a fixing frame 51 fixed on the top of the table 2, and an adjusting cylinder 52 is installed above the fixing frame 51. A fixing head 53 is fixed on the push rod of the adjusting cylinder 52, and an adjusting rod 54 is inserted into the fixing head 53 for sliding left and right. Round holes are provided at the left and right ends of the fixing head 53, and two extension plates are symmetrically protruded from the front end of the fixing head 53. A clamping groove is symmetrically provided on the side of the two extension plates close to each other, and the adjusting rod 54 is inserted into the clamping groove. The two extension plates are fixed by bolts and nuts. The adjusting rod 54 can be moved left and right by loosening the bolts, and then the nuts can be tightened to adjust the rod. An adjustment block 55 is fixed on 54, and an air pipe 56 is fixed on the adjustment block 55. The rear end of the air pipe 56 is connected to an external blowing and exhausting dual-purpose pump through a hose. During welding, the air pipe 56 can inhale, thereby sucking away the fume generated during welding. After welding is completed, the air pipe 56 can blow out airflow, thereby allowing the pipe to cool quickly after welding. The blowing and exhausting dual-purpose pump adopts a blowing and exhausting dual-purpose dust suction gun, which itself has two pipes. During inhalation, the fume is collected into the collection device through the suction pipe, and during blowing, the airflow is discharged through the outlet pipe through the switching switch, which can prevent the blown gas from having fume dust and avoid dust pollution.

[0040] The jacking assembly 7 includes two groups of parallel linear rails 722 fixed by screws above the table 2, and a linear slider 721 is slidably installed on the linear rails 722, wherein a jacking seat 72 is fixed on the rear linear slider 721, and a right three-jaw chuck 73 is rotatably installed on the right side of the jacking seat 72. A jacking cylinder 71 is fixed above the table 2 through a bracket, and the push rod of the jacking cylinder 71 is connected to the jacking seat 72. The extension and retraction of the push rod of the jacking cylinder 71 can make the jacking seat 72 move left and right along the linear rails 722, thereby making the flange fixed on the right three-jaw chuck 73 move to the left, and abut against the pipe fitting fixed on the left three-jaw chuck 67 and perform laser welding. The position of the flange on the right three-jaw chuck 73 can be adjusted left and right, which is suitable for welding pipe fittings of various lengths.

[0041] The center axis of the right three-jaw chuck 73 is collinear with the center axis of the left three-jaw chuck 67, and the center axis of the left three-jaw chuck 67 is collinear with the center axis of the workpiece sleeve 66. The axis of the pipe clamped and fixed on the left three-jaw chuck 67 can be collinear with the flange clamped on the right three-jaw chuck 73. There will be no positional offset between the two when they are docked, which improves the subsequent welding accuracy.

[0042] The shading structure 8 includes a shading plate 81, a rotating shaft 82 is fixed below the shading plate 81, two sets of connecting shaft seats 85 are symmetrically fixed on the left and right sides above the table 2, and the left and right ends of the rotating shaft 82 are integrally formed with shaft rods, and the left and right shaft rods are respectively rotatably connected to the two connecting shaft seats 85. The left and right ends of the rotating shaft 82 are respectively sleeved with a torsion spring 84, one end of the torsion spring 84 is connected to the connecting shaft seat 85, and the other end of the torsion spring 84 is connected to the shading plate 81. The torsion spring 84 makes the shading plate 81 always have a tendency to deflect toward the side away from the lifting seat 72. A deflection member 83 is provided on the rotating shaft 82, and a driving member 74 is fixed on the two linear sliders 721. The driving member 74 is in rolling contact with the deflection member 83.

[0043] The deflection member 83 includes a rotating portion 831 welded to the outer ring of the rotating shaft 82. The rotating portion 831 is a spiral plate. The leftmost end of the rotating portion 831 is extended to form a linear portion 832. The driving member 74 includes a driving frame 741 fixed to two linear sliders 721. The driving frame 741 has an L-shaped structure. The front end of the driving frame 741 is rotatably mounted with a driving wheel 742 via an axle pin. The driving wheel 742 is in rolling contact with the deflection member 83.

[0044] A placement slot 21 is provided on the table 2, and the placement slot 21 is placed below the deflection member 83. The length and width of the placement slot 21 are greater than the length and width of the deflection member 83. When the deflection member 83 rotates along with the rotating shaft 82, the deflection member 83 can extend into the placement slot 21 without colliding or interfering with the upper surface of the table 2.

[0045] When the light shielding plate 81 and the table 2 are in a vertical state, the rightmost end of the rotating portion 831 is vertically downward, the leftmost end of the rotating portion 831 is designed to be parallel to the upper surface of the table 2, and the straight portion 832 is designed to be parallel to the upper surface of the table 2;

[0046] When the light shielding plate 81 is parallel to the platen 2 , the rightmost end of the rotating portion 831 is parallel to the upper surface of the platen 2 , and the leftmost end of the rotating portion 831 and the straight portion 832 are vertically upward;

[0047] The rotating part 831 is designed with a ninety-degree angle between the leftmost end and the rightmost end. The rotating part 831 and the rotating shaft 82 have a tendency to deflect counterclockwise under the action of the torsion spring 84. In the initial state, the push rod of the lifting cylinder 71 is extended and retracted, and the lifting seat 72 and the driving member 74 are both at the rightmost end. The rotating member is also at the rightmost end, and the driving wheel 742 is in rolling contact with the upper surface of the rightmost end of the rotating part 831, and the outer ring of the driving wheel 742 is in contact with the rightmost end surface of the rotating part 831. When the driving wheel 742 moves along the rightmost end of the rotating part 831 to the leftmost end, since there is a ninety-degree angle between the rightmost end and the leftmost end of the rotating part 831, the driving wheel 742 will rotate ninety degrees during the movement of the driving wheel 742, so that the light shielding plate 81 is moved from parallel to upright, which can block the workpiece and the light generated during welding will not directly hit the eyes of the staff.

[0048] Working principle: In the initial state, the push rod of the lifting cylinder 71 is in a retracted state, the lifting seat 72 and the driving member 74 are both at the rightmost end, and the driving wheel 742 is at the leftmost end of the rotating part 831. Since the rotating part 831 and the rotating shaft 82 have a tendency to deflect counterclockwise under the action of the torsion spring 84, the light shielding plate 81 is parallel to the upper surface of the table 2 at this time, and the rightmost end of the rotating part 831 is parallel to the upper surface of the table 2. The leftmost end of the rotating part 831 and the straight part 832 are vertically upward, and the rightmost end to the leftmost end of the rotating part 831 are distributed in a spiral ascending shape, and the outer ring of the driving wheel 742 is in contact with the rightmost end surface of the rotating part 831.

[0049] Fix the flange on the right three-jaw chuck 73, insert the pipe into the workpiece sleeve 66 from left to right, and make the right end of the pipe pass through the left three-jaw chuck 67, and the right end of the pipe is at the left end of the left three-jaw chuck 67, and fix the pipe by the left three-jaw chuck 67;

[0050] After that, the workpiece cover 66 is directly placed into the lower arc opening 641, and the bevel gear 1 65 is placed in the gap between the lower left seat 64 and the lower right seat 63, and the bevel gear 1 65 is meshed with the bevel gear 2 68. Then, the push rod of the opening and closing cylinder 62 is extended to make the upper closing seat 61 deflect downward with the deflection axis 631 as the axis pin, and the front end of the upper closing seat 61 is pressed onto the lower closing seat. The workpiece cover 66 is between the upper arc opening 611 and the lower arc opening 641, and the workpiece cover 66 can be quickly installed;

[0051] After that, the flange is fixed on the right three-jaw chuck 73. Then, the extension of the push rod of the jacking cylinder 71 enables the jacking seat 72 to move leftward along the linear track 722, thereby enabling the flange fixed on the right three-jaw chuck 73 to move leftward and abut against the pipe fixed on the left three-jaw chuck 67.

[0052] When the lifting seat 72 moves to the left, the driving wheel 742 will also move along the rotating portion 831 with the lifting seat 72. When the driving wheel 742 moves to the leftmost end along the rightmost end of the rotating portion 831, since there is a ninety-degree angle between the rightmost end and the leftmost end of the rotating portion 831, the driving wheel 742 will rotate ninety degrees during the movement process, so that the light shielding plate 81 moves from parallel to upright. In the subsequent movement process, the driving wheel 742 contacts the straight portion 832. At this time, the light shielding plate 81 remains in an upright state. Before the flange abuts the pipe fitting, the light shielding plate 81 has been erected so as to shield the workpiece.

[0053] Afterwards, the three-axis motion slide 3 drives the laser welding module 4 to move to the joint between the pipe and the flange. The laser welding module 4 aligns the welding head with the joint and performs welding. During the welding process, the drive motor 69 rotates to rotate the bevel gear 2 68, and then the bevel gear 1 65 is rotated through the bevel gear 2 68. The rotating bevel gear 1 65 will drive the left three-jaw chuck 67 and the workpiece sleeve 66 to rotate. When the workpiece sleeve 66 rotates, it will drive the three-jaw chuck 73 to rotate together, so that the workpiece can be welded in all directions. In addition, during the welding process, the blowing and exhausting dual-purpose pump enables the air pipe 56 to inhale, thereby sucking away the smoke generated during welding. After the welding is complete, the blowing and exhausting dual-purpose pump can blow out air through the air pipe 56, so that the pipe can be cooled quickly after welding.

[0054] After that, the right three-jaw chuck 73 releases the clamping of the workpiece, and the lifting seat 72 moves to the right under the action of the lifting cylinder 71. The light shielding plate remains in an upright state during the movement of the driving wheel 742 in contact with the straight portion 832. When the driving wheel 742 breaks away from the straight portion 832 and enters the rotating portion 831, the rotating portion 831 and the rotating shaft 82 have a tendency to deflect counterclockwise under the action of the torsion spring 84. The light shielding plate 81 will gradually deflect counterclockwise. When the driving wheel 742 moves to the rightmost end, the light shielding plate 81 is deflected counterclockwise to the maximum extent and is parallel to the table 2.

[0055] After moving the lifting seat 72 to the rightmost end, the fixation of the left three-jaw chuck 67 on the pipe fitting will be released, and the pipe fitting connected to the flange can be pulled out from the right side. If the length of the pipe fitting is long, even after the lifting seat 72 is moved to the rightmost end, the pipe fitting still cannot be pulled out, the upper closing seat 61 can be opened by the opening and closing cylinder 62. When the push rod of the opening and closing cylinder 62 is contracted, the upper closing seat 61 can be deflected upward with the deflection axis 631 as the axis, and the front end of the upper closing seat 61 is lifted. At this time, the workpiece sleeve 66 and the left three-jaw chuck 67 can be removed, and the welded workpiece can be removed.

[0056] By arranging a clamping assembly 6 above the table 2 and cooperating with the jacking assembly 7, the clamping assembly 6 can quickly clamp and fix the pipe fitting, and the jacking assembly 7 can quickly clamp and fix the flange, so that the two can be quickly docked, which is convenient for subsequent welding. The clamping assembly 6 is composed of three parts: an upper closing seat 61, a lower closing seat and a workpiece sleeve 66. The upper closing seat 61 can be opened as needed under the action of the opening and closing cylinder 62, and then the workpiece sleeve 66 can be taken out. In this way, the pipe fitting can be fixed in the workpiece sleeve 66 before installation. In this way, after the pipe fitting is welded, even if the pipe fitting is long as a whole, the welded workpiece can be quickly taken out, thereby improving welding efficiency.

[0057] By rotatably installing the light shielding plate 81 on the table 2, the light shielding plate 81 is linked to the jacking assembly 7 through the deflection member 83 and the driving member 74. When the jacking assembly 7 clamps the flange and docks the pipe, it can ensure that the light shielding plate 81 is erected and shielded. The light generated during welding will not directly shine into the eyes of the workers, nor will it cause damage to the skin of the workers, thereby improving safety.

[0058] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0059] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0060] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A laser welding device for an opening and closing tool joint, characterized in that: The machine comprises a frame (1), a table (2) is fixed above the frame (1), a three-axis motion slide (3) is installed on the rear side above the table (2), a laser welding module (4) is installed on the slide of the three-axis motion slide (3), a pneumatic module (5) is installed on the left side of the three-axis motion slide (3), a clamping assembly (6) for clamping a workpiece is installed on the left side above the table (2), a lifting assembly (7) is provided on the right side of the clamping assembly (6), a shading structure (8) is rotatably installed above the table (2), the shading structure (8) is located in front of the lifting assembly (7), and the shading structure (8) is slidably connected to the lifting assembly (7); An opening is provided on the left side above the table (2), and the clamping assembly (6) includes a lower closing seat, on which a workpiece sleeve (66) is rotatably placed, and an outer ring of the workpiece sleeve (66) is welded with a bevel gear (65), and a left three-jaw chuck (67) is fixed to the right end of the workpiece sleeve (66). A driving device is installed below the table (2), and the driving device is connected to the bevel gear (65). An opening and closing cylinder (62) is rotatably installed below the table (2) through a shaft pin and a shaft seat, and a push rod of the opening and closing cylinder (62) passes through the table (2) and is placed above the table (2). The end of the push rod of the opening and closing cylinder (62) is rotatably connected to a universal shaft, and an upper closing seat (61) is rotatably installed above the lower closing seat, and the rear end of the upper closing seat (61) is rotatably connected to the universal shaft through a shaft pin; The lower closing seat comprises a lower left seat (64) and a lower right seat (63) fixed on the table (2), the lower halves of the lower left seat (64) and the lower right seat (63) pass through the opening and are located below the table (2), a gap is left between the lower left seat (64) and the lower right seat (63), and a lower arc opening (641) is provided above the lower left seat (64) and the lower right seat (63), a deflection shaft (631) is provided at the rear end of the lower right seat (63), a hinge hole (632) is opened and closed on the upper closing seat (61), the upper closing seat (61) is rotatably connected to the lower right seat (63) through the deflection shaft (631) and the hinge hole (632), and an upper arc opening (611) is provided below the upper closing seat (61); The driving device includes a helical gear 2 (68) rotatably mounted in the gap between the lower left seat (64) and the lower right seat (63) via a rotating shaft and a bearing, the helical gear 2 (68) meshing with the helical gear 1 (65), a driving motor (69) is mounted on the right side of the lower right seat (63), the output shaft of the driving motor (69) is connected to the rotating shaft via a coupling, and the driving motor (69) is mounted below the table (2) via a bracket.

2. The laser welding device for an opening and closing tool joint according to claim 1, characterized in that: The pneumatic module (5) includes a fixing frame (51) fixed above the table (2), an adjusting cylinder (52) is installed above the fixing frame (51), a fixing head (53) is fixed on the push rod of the adjusting cylinder (52), an adjusting rod (54) is inserted and slidably connected to the fixing head (53), an adjusting block (55) is fixed on the adjusting rod (54), an air pipe (56) is fixed on the adjusting block (55), and the rear end of the air pipe (56) is connected to an external blowing and pumping dual-purpose pump through a hose.

3. The laser welding device for an opening and closing tool joint according to claim 1, characterized in that: The lifting assembly (7) includes two sets of parallel linear rails (722) fixed by screws above the table (2), and a linear slider (721) is slidably installed on the linear rail (722), wherein a lifting seat (72) is fixed on the rear side of the linear slider (721), and a right three-jaw chuck (73) is rotatably installed on the right side of the lifting seat (72). A lifting cylinder (71) is fixed above the table (2) through a bracket, and a push rod of the lifting cylinder (71) is connected to the lifting seat (72).

4. The laser welding device for an opening and closing tool joint according to claim 3, characterized in that: The central axis of the right three-jaw chuck (73) is collinear with the central axis of the left three-jaw chuck (67), and the central axis of the left three-jaw chuck (67) is collinear with the central axis of the workpiece sleeve (66).

5. The laser welding device for an opening and closing tool joint according to claim 4, characterized in that: The shading structure (8) includes a shading plate (81), a rotating shaft (82) is fixed below the shading plate (81), two groups of connecting shaft seats (85) are symmetrically fixed on the left and right sides above the table (2), and the left and right ends of the rotating shaft (82) are integrally formed with shaft rods, and the left and right shaft rods are respectively rotatably connected to the two connecting shaft seats (85), and the left and right ends of the rotating shaft (82) are respectively sleeved with a torsion spring (84), one end of the torsion spring (84) is connected to the connecting shaft seat (85), and the other end of the torsion spring (84) is connected to the shading plate (81), and a deflection member (83) is provided on the rotating shaft (82), and a driving member (74) is fixed on the two linear sliders (721), and the driving member (74) is in rolling contact with the deflection member (83).

6. The laser welding device for an opening and closing tool joint according to claim 5, characterized in that: The deflection member (83) includes a rotating portion (831) welded to the outer ring of the rotating shaft (82), the rotating portion (831) is a spiral plate, and the leftmost end of the rotating portion (831) is extended to form a straight portion (832). The driving member (74) includes a driving frame (741) fixed on two straight sliders (721), and the driving frame (741) is an L-shaped structure. A driving wheel (742) is rotatably mounted on the front end of the driving frame (741) through an axle pin, and the driving wheel (742) is in rolling contact with the deflection member (83); A placement slot (21) is provided on the table (2), the placement slot (21) is placed below the deflection member (83), and the length and width of the placement slot (21) are greater than the length and width of the deflection member (83).

7. The laser welding device for an opening and closing tool joint according to claim 6, characterized in that: When the light shielding plate (81) and the table (2) are in a vertical state, the rightmost end of the rotating portion (831) is vertically downward, the leftmost end of the rotating portion (831) is designed to be parallel to the upper surface of the table (2), and the straight portion (832) is designed to be parallel to the upper surface of the table (2); When the shading plate (81) is parallel to the table (2), the rightmost end of the rotating portion (831) is parallel to the upper surface of the table (2), and the leftmost end of the rotating portion (831) and the straight portion (832) are vertically upward.

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