Laser welding device of profile composite machine tool and use method thereof

Abstract

The application discloses a profile composite machine tool laser welding device and a use method, relates to the technical field of machine tools, and belongs to the technical field of machine tools.The laser welding device comprises a bed body, a vertical moving mechanism arranged on the upper portion of the bed body, a fixing seat arranged on the vertical moving mechanism, a rotating seat and a power mechanism arranged on the fixing seat, an adjusting mechanism and two supporting seats arranged on the rotating seat, a polisher arranged on one supporting seat, and a laser device arranged on the other supporting seat.In the process of welding a rotary body workpiece on a profile, the use method comprises the following steps: moving two clamping plates to the upper portion of the rotary body workpiece; moving the two clamping plates downward to clamp the rotary body workpiece; melting the end portion of a metal wire by the laser device, so that the rotary body workpiece is spot-welded with the profile; driving the rotating seat to rotate horizontally around the fixing seat by the power mechanism, and polishing a weld seam while welding the weld seam; and resetting each structure after welding and polishing are completed.The laser welding device can simultaneously perform laser welding operation and polishing operation, and is favorable for improving machining efficiency.

Description

Technical Field

[0001] This invention relates to the field of machine tool technology, specifically to a laser welding device and method for using a profile composite machine tool. Background Technology

[0002] Laser welding is a highly efficient and precise welding method that uses a high-energy-density laser beam as a heat source. Compared with conventional welding methods, laser welding has the advantages of low heat input, small heat-affected zone, significantly reduced material deformation, and no need for additional heat treatment after welding.

[0003] Laser welding technology includes laser fusion welding, laser melting welding, and laser filler wire welding.

[0004] Laser welding is one of the most common methods of laser welding technology. It uses a laser beam to heat the material to a molten state, and then cools it to form a weld, thus connecting the materials.

[0005] Laser fusion welding is similar to laser fusion splicing, both using a laser beam to heat materials to a molten state. However, laser fusion welding involves spraying molten metal onto the workpiece during the welding process to increase the weld depth and width, thereby improving weld quality.

[0006] Laser wire welding involves feeding welding material (such as metal wire) while the laser beam is emitted. The laser beam melts the welding material, and as the laser moves and the welding material is fed, a weld is formed on the workpiece, thus achieving welding.

[0007] After welding is completed, the weld area needs to be ground. On the one hand, defects such as porosity, slag inclusions, and cracks may occur during the welding process. Grinding can remove these defects that affect the strength and sealing of the weld, which is beneficial to improving the welding quality. On the other hand, there may be stress concentration points on the surface of the weld that has not been ground. Grinding can reduce the risk of fatigue failure and extend the service life of the structure. Furthermore, grinding can make the weld look more aesthetically pleasing and improve the surface quality.

[0008] Currently, machine tools that combine laser processing and grinding are called composite machine tools. A composite machine tool includes a bed, with a transverse traversing mechanism on top of the bed, a longitudinal traversing mechanism on top of the transverse traversing mechanism, and a vertical traversing mechanism on top of the longitudinal traversing mechanism. The vertical traversing mechanism houses the laser and the grinder, and also has two telescopic devices used to move the laser and the grinder downwards, respectively. A worktable is located at the bottom of the bed, used to support the workpiece.

[0009] When welding rotating workpieces (such as pipes) onto profiles, a telescopic device on the vertical movement mechanism pushes the laser down to approach the pipe. The horizontal and vertical movement mechanisms work together to adjust the position of the laser so that the laser performs laser welding around the pipe. After welding is completed, the laser moves up to reset. Then, another telescopic device pushes the grinder down to approach the weld. The horizontal and vertical movement mechanisms work together to adjust the position of the grinder so that the grinder performs grinding around the pipe.

[0010] As can be seen from the above process, laser welding and grinding operations need to be carried out separately and cannot be carried out simultaneously, which means that processing efficiency needs to be improved. Summary of the Invention

[0011] The present invention addresses the aforementioned shortcomings of the existing technology by providing a laser welding device and method for using a profile composite machine tool. The present invention can perform laser welding and grinding operations simultaneously, which is beneficial to improving processing efficiency.

[0012] To achieve the above objectives, the present invention provides the following technical solution:

[0013] A laser welding device for a profile composite machine tool includes a bed, a transverse traversing mechanism on the upper part of the bed, a longitudinal traversing mechanism on the transverse traversing mechanism, a vertical traversing mechanism on the longitudinal traversing mechanism, a worktable on the lower part of the bed, a fixed seat on the vertical traversing mechanism, a rotating seat and a power mechanism on the fixed seat, the power mechanism driving the rotating seat to rotate horizontally around the fixed seat, an adjustment mechanism and two support seats on the rotating seat, the tops of the two support seats being rotatably connected to the rotating seat, the adjustment mechanism being used to adjust the bottom distance between the two support seats, a grinder on one support seat and a laser on the other support seat.

[0014] Furthermore, the power mechanism includes a power motor, a power gear, and a power gear ring. The power motor is located on the top of the fixed base, the power gear is located on the output shaft of the power motor, and the power gear ring is located on the top of the rotating base. The power gear and the power gear ring cooperate with each other.

[0015] Furthermore, both of the support seats are rotatably connected to the rotating seat on the top of their respective sides facing each other, and both support seats have elongated holes on their tops.

[0016] The adjustment mechanism includes two telescopic adjustment rods, both of which are mounted on a rotating base. Each of the two telescopic adjustment rods has an adjustment pin at its bottom, and one adjustment pin engages with an elongated hole on a support base.

[0017] Furthermore, both of the support bases are equipped with a lifting telescopic rod and a lifting seat. The lifting telescopic rod is used to drive the lifting seat to move up and down on the support base. One lifting seat is equipped with the laser, and the other lifting seat is equipped with the grinder.

[0018] Furthermore, the lifting telescopic rod is a rodless cylinder, and the piston of the rodless cylinder is connected to the lifting seat.

[0019] Furthermore, it also includes a centering mechanism, which includes a mounting plate, clamping plates, and an elastic element. The mounting plate is located at the bottom of the rotating seat, and two clamping plates are slidably connected to the mounting plate. Both clamping plates have arc-shaped guide surfaces at the bottom of their respective sides facing each other, and arc-shaped clamping surfaces at the top of their respective sides facing each other. An elastic element is also provided on the base plate, which pushes the two clamping plates closer to each other. The two clamping plates are perpendicular to the two support seats at a horizontal angle.

[0020] Furthermore, the rotating base is also provided with a wire feeding mechanism, which is used to feed metal wire to the laser.

[0021] Furthermore, the fixed base is provided with a central hole, the rotating base is provided with a central cylinder, the central cylinder is located in the central hole, a wiring cavity is provided between the mounting plate and the rotating base, and a guide seat is provided on the side of the laser, the guide seat is provided with a guide hole;

[0022] The wire feeding mechanism includes a wire feeding seat, a winding roller, a frame, a wire feeding roller, a wire feeding gear, and a wire feeding motor. The wire feeding seat is located at the top of the central cylinder, and the winding roller is rotatably connected to the wire feeding seat. The frame is located at the bottom of the rotating seat, and two wire feeding rollers are rotatably connected to the frame. Each of the two wire feeding rollers is equipped with a wire feeding gear, and the two wire feeding gears cooperate with each other. The frame is also equipped with a wire feeding motor, and the output shaft of the wire feeding motor is connected to one of the wire feeding rollers. The surface of the winding roller is wound with the metal wire, and one end of the metal wire passes through the central cylinder, the wire feeding cavity, the gap between the two wire feeding rollers, and the guide hole in sequence before extending to the bottom of the laser.

[0023] A method for using a laser welding device for a profile composite machine tool, based on the aforementioned laser welding device for a profile composite machine tool, includes the following steps when welding a rotating workpiece onto a profile:

[0024] (1) Place the profile on the worktable and place the rotating workpiece on the target position of the profile;

[0025] (2) The horizontal movement mechanism and the vertical movement mechanism drive the fixed seat to move above the rotating workpiece, the vertical movement mechanism drives the fixed seat to move down, the fixed seat drives the rotating seat to move down, the rotating seat drives the mounting plate to move down, the mounting plate drives the two clamping plates to move down, so that the two clamping plates gradually clamp the rotating workpiece, and the axis of the rotating workpiece coincides with the rotation center of the rotating seat.

[0026] (3) The adjustment mechanism reduces the bottom distance between the two support seats so that the laser and the grinder are facing the rotating workpiece. The wire feeding mechanism feeds the metal wire below the laser and the laser melts the end of the metal wire so that the rotating workpiece and the profile are spot welded together.

[0027] (4) The power mechanism drives the rotating seat to rotate horizontally around the fixed seat. The rotating seat drives the wire feeding mechanism, two clamping plates, laser and grinder to rotate around the rotating workpiece. The laser melts the metal wire at the connection between the rotating workpiece and the profile, so that a circular weld is formed at the connection between the rotating workpiece and the profile. The grinder grinds the circular weld.

[0028] (5) The adjustment mechanism increases the bottom distance between the two support seats so that the laser and the grinder are both away from the rotating workpiece. The vertical movement mechanism drives the fixed seat to move upward, the fixed seat drives the rotating seat to move upward, and the rotating seat drives the laser, the grinder and the two clamps to move upward away from the rotating workpiece.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0030] 1. Because the power mechanism can drive the rotating seat to rotate around the fixed seat, and the support seats where the laser and the grinder are located are both installed on the rotating seat, when welding the rotating workpiece onto the profile, both the laser and the grinder can rotate around the rotating workpiece, and welding and grinding operations can be performed simultaneously, thus improving processing efficiency.

[0031] 2. When the rotating seat does not rotate around the fixed seat, the horizontal and vertical movement mechanisms can be used to drive the laser and the grinder to move together in the horizontal or vertical direction, so that welding and grinding operations in the straight direction can be performed simultaneously. This allows the device to process not only circular welds but also straight welds at the same time, improving its flexibility and adaptability.

[0032] 3. By installing a rodless cylinder on the support base, the lifting base can be driven to bring the laser or grinder closer to the rotating workpiece, making the distance between the laser and grinder and the rotating workpiece adjustable and improving the flexibility of use.

[0033] 4. This invention enables laser welding without using a wire feeding mechanism; and enables laser filler wire welding with a wire feeding mechanism. This allows the device to perform different types of laser welding operations, further improving its adaptability and flexibility of use.

[0034] 5. Because the wire feeding mechanism has a fixed feeding seat on the central cylinder and a winding roller with the wire wound on it that is rotatably mounted on the feeding seat, and the central cylinder is fixed on the rotating seat, when the power mechanism drives the rotating seat to rotate around the fixed seat, the rotating seat drives the central cylinder, the central cylinder drives the feeding seat, the feeding seat drives the winding roller to rotate together, and the rotating seat also drives the frame, which in turn drives the wire feeding roller, the wire feeding gear, and the wire feeding motor to rotate together. This allows the wire feeding mechanism to rotate with the rotating seat, preventing the wire from getting tangled on the fixed seat and avoiding wire feeding obstruction caused by the wire getting tangled on the fixed seat, thus improving the reliability of wire feeding.

[0035] 6. When the rotating seat moves the two clamping plates in the centering mechanism downwards together, the arc-shaped clamping surfaces of the two clamping plates gradually clamp the outer wall of the pipe fitting, making the axis of the pipe fitting, the axis of the central cylinder, and the rotation center of the rotating seat coincide. During spot welding, the two clamping plates can stably clamp the pipe fitting, preventing it from shifting and improving the accuracy and stability of spot welding.

[0036] 7. Because the two clamping plates in the centering mechanism are perpendicular to the two support seats at a horizontal angle, and the clamping plates, laser, and grinder all rotate together with the rotating seat, the two clamping plates can always separate the laser and the grinder, preventing the debris from the grinder from splashing onto the laser welding area of ​​the laser and preventing debris from getting into the weld, which helps to ensure the quality of the weld. Attached Figure Description

[0037] Figure 1 An assembly perspective view of the bed, transverse traverse mechanism, longitudinal traverse mechanism, vertical traverse mechanism, and worktable;

[0038] Figure 2 Assemble a three-dimensional assembly of transverse, longitudinal, and vertical movement mechanisms. Figure 1 ;

[0039] Figure 3 Assemble a three-dimensional assembly of transverse, longitudinal, and vertical movement mechanisms. Figure 2 ;

[0040] Figure 4 Assemble a three-dimensional assembly of transverse, longitudinal, and vertical movement mechanisms. Figure 3 ;

[0041] Figure 5 A perspective view of a laser welding device for a composite profile machine tool;

[0042] Figure 6 This is a front view of a laser welding device for a profile composite machine tool;

[0043] Figure 7 For the assembly of fixed base, rotary base, power mechanism, support base and adjustment mechanism in three dimensions Figure 1 ;

[0044] Figure 8 For the assembly of fixed base, rotary base, power mechanism, support base and adjustment mechanism in three dimensions Figure 2 ;

[0045] Figure 9 For the assembly of fixed base, rotary base, power mechanism, support base and adjustment mechanism in three dimensions Figure 3 ;

[0046] Figure 10 This is the main assembly view of the fixed base, rotary base, power mechanism, support base, and adjustment mechanism.

[0047] Figure 11 for Figure 10 Cross-sectional perspective view at point AA;

[0048] Figure 12 An assembly perspective view of the fixed base, rotary base, power mechanism, support base, adjustment mechanism, laser, and grinder;

[0049] Figure 13 A three-dimensional assembly of a fixed base, rotary base, power mechanism, support base, adjustment mechanism, laser, grinder, and wire feeding mechanism. Figure 1 ;

[0050] Figure 14 A three-dimensional assembly of a fixed base, rotary base, power mechanism, support base, adjustment mechanism, laser, grinder, and wire feeding mechanism. Figure 2 ;

[0051] Figure 15 This is a front view of the assembly of the fixed base, rotary base, power mechanism, support base, adjustment mechanism, laser, grinder, and wire feeding mechanism.

[0052] Figure 16 This diagram shows the usage status of the fixed base, rotary base, power mechanism, support base, adjustment mechanism, laser, grinder, and wire feeding mechanism.

[0053] Figure 17 An assembly perspective view of the fixed base, rotary base, power mechanism, support base, adjustment mechanism, laser, grinder, wire feeding mechanism and centering mechanism;

[0054] Figure 18 Three-dimensional for centering mechanism Figure 1 ;

[0055] Figure 19 Three-dimensional for centering mechanism Figure 2 ;

[0056] Figure 20 This is the front view of the centering mechanism.

[0057] Explanation of reference numerals in the attached figures:

[0058] 1-Bed body,

[0059] 2-Workbench,

[0060] 31-Transverse slide rail, 32-Transverse rack, 33-Transverse base, 34-Transverse motor, 35-Transverse gear.

[0061] 41-Longitudinal slide block, 42-Longitudinal nut, 43-Longitudinal slide rail, 44-Longitudinal seat, 45-Longitudinal motor, 46-Longitudinal lead screw.

[0062] 51-Vertical slide block, 52-Vertical slide nut, 53-Vertical slide rail, 54-Vertical slide seat, 55-Vertical slide motor, 56-Vertical slide screw.

[0063] 6-Fixed base, 61-Center hole,

[0064] 7-Rotating seat, 71-Center cylinder,

[0065] 81-Power motor, 82-Power gear, 83-Power gear ring,

[0066] 9-Support base, 91-Elongated hole, 92-Rodless cylinder, 921-Piston, 93-Lifting seat,

[0067] 10 - Adjustable telescopic rod, 101 - Adjustable pin,

[0068] 20-Laser, 201-Guide seat,

[0069] 30-Grinding tool

[0070] 401 - Pay-off base, 402 - Winding roller, 403 - Frame, 404 - Wire feeding roller, 405 - Wire feeding gear, 406 - Wire feeding motor

[0071] 50-metal wire,

[0072] 601-Mounting plate, 6011-Cable routing cavity, 6012-Radial hole, 602-Clamping plate, 6021-Arc-shaped guide surface, 6022-Arc-shaped clamping surface, 603-Elastic element.

[0073] 70-profile,

[0074] 80- Rotating workpiece. Detailed Implementation

[0075] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0076] Example 1:

[0077] See Figure 1 A laser welding device for a profile composite machine tool, comprising a bed 1.

[0078] See Figure 1 A worktable 2 is installed on the lower part of the bed 1.

[0079] A transverse movement mechanism is installed on the upper part of the bed 1, a longitudinal movement mechanism is installed on the transverse movement mechanism, and a vertical movement mechanism is installed on the longitudinal movement mechanism.

[0080] See Figure 1 and Figure 2 The transverse movement mechanism includes a transverse slide rail 31, a transverse rack 32, a transverse seat 33, a transverse motor 34, and a transverse gear 35. The transverse slide rail 31 and the transverse rack 32 are both fixedly mounted on the top of the bed 1. The transverse seat 33 slides in lateral engagement with the transverse slide rail 31. The transverse motor 34 is a servo motor and is fixedly mounted on the transverse seat 33. The transverse gear 35 is fixedly mounted on the output shaft of the transverse motor 34 and meshes with the transverse rack 32.

[0081] The working principle of the transverse movement mechanism is as follows: After the transverse movement motor 34 is started, the output shaft of the transverse movement motor 34 drives the transverse movement gear 35 to rotate. Because the transverse movement gear 35 meshes with the transverse movement rack 32, and the transverse movement rack 32 is fixedly installed on the upper part of the bed 1, the transverse movement gear 35 actively moves along the transverse movement rack 32. Also, because the transverse movement motor 34 is fixedly installed on the transverse movement seat 33, the transverse movement gear 35 drives the transverse movement seat 33 to actively move laterally together.

[0082] See Figure 2 and Figure 3 The longitudinal movement mechanism includes a longitudinal movement slide 41, a longitudinal movement nut 42, a longitudinal movement slide rail 43, a longitudinal movement seat 44, a longitudinal movement motor 45, and a longitudinal movement lead screw 46. See also... Figure 3 Both the longitudinal sliding block 41 and the longitudinal sliding nut 42 are fixedly mounted on the top surface of the transverse sliding block 33. See also Figure 2The longitudinal slide rail 43 is fixedly mounted on the bottom surface of the longitudinal slide base 44. The longitudinal slide rail 43 slides longitudinally in cooperation with the longitudinal slide base 41. The longitudinal motor 45 is a servo motor, which is fixedly mounted on the bottom surface of the longitudinal slide base 44. The output shaft of the longitudinal motor 45 is fixedly connected to one end of the longitudinal lead screw 46. Both ends of the longitudinal lead screw 46 are rotatably connected to the longitudinal slide base 44 through bearings. See also Figure 3 The longitudinal lead screw 46 is threadedly connected to the longitudinal nut 42.

[0083] The working principle of the longitudinal movement mechanism is as follows: After the longitudinal movement motor 45 is started, the output shaft of the longitudinal movement motor 45 drives the longitudinal movement screw 46 to rotate. Because the longitudinal movement nut 42 is threadedly connected to the longitudinal movement screw 46, and the longitudinal movement slide 41 is slidably engaged with the longitudinal movement slide rail 43, and both the longitudinal movement nut 42 and the longitudinal movement slide 41 are fixedly installed on the transverse movement seat 33, the longitudinal movement screw 46 drives the longitudinal movement seat 44 to move actively along the longitudinal direction.

[0084] See Figure 4 The vertical movement mechanism includes a vertical movement slide 51, a vertical movement nut 52, a vertical movement rail 53, a vertical movement base 54, a vertical movement motor 55, and a vertical movement screw 56. The vertical movement slide 51 and the vertical movement nut 52 are both fixedly installed at the ends of the vertical movement base 44. The vertical movement rail 53 is fixedly installed on the side of the vertical movement base 54, and slides vertically with the vertical movement slide 51. The vertical movement motor 55 is a servo motor, fixedly installed on the top side of the vertical movement base 54. The output shaft of the vertical movement motor 55 is fixedly connected to the upper end of the vertical movement screw 56. Both the upper and lower ends of the vertical movement screw 56 are rotatably connected to the vertical movement base 54 via bearings. The vertical movement screw 56 is threadedly connected to the vertical movement nut 52.

[0085] The working principle of the vertical movement mechanism is as follows: After the vertical movement motor 55 is started, the output shaft of the vertical movement motor 55 drives the vertical movement screw 56 to rotate. Because the vertical movement nut 52 is threadedly connected to the vertical movement screw 56, and the vertical movement slide 51 is slidably engaged with the vertical movement slide rail 53, and both the vertical movement nut 52 and the vertical movement slide 51 are fixedly installed on the vertical movement seat 54, the vertical movement screw 56 drives the vertical movement seat 54 to move actively along the vertical direction.

[0086] See Figure 5 , Figure 6 and Figure 11 A fixed base 6 is fixedly installed at the bottom of the vertical moving base 54. The fixed base 6 is provided with a rotating base 7 and a power mechanism. The power mechanism is used to drive the rotating base 7 to rotate horizontally around the fixed base 6.

[0087] See Figure 8 and Figure 11The power mechanism includes a power motor 81, a power gear 82, and a power gear ring 83. The power motor 81 is a servo motor, which is fixedly mounted on the top of the fixed base 6. The power gear 82 is fixedly mounted on the output shaft of the power motor 81, and the power gear ring 83 is fixedly mounted on the top of the rotating base 7. The power gear ring 83 is sleeved on the outside of the power gear 82, and the power gear 82 and the power gear ring 83 cooperate with each other.

[0088] The working principle of the power mechanism is as follows: After the power motor 81 is started, the output shaft of the power motor 81 drives the power gear 82 to rotate. Because the power gear 82 meshes with the power gear ring 83, the power gear ring 83 drives the rotating seat 7 to rotate around the fixed seat 6 in the horizontal plane.

[0089] See Figure 7 and Figure 8 The rotating seat 7 is equipped with an adjustment mechanism and two support seats 9. The adjustment mechanism is used to adjust the bottom distance between the two support seats 9.

[0090] See Figure 7 and Figure 8 Both support bases 9 are rotatably connected to the rotating base 7 on the upper end of the side facing each other, and both support bases 9 have elongated holes 91 on their tops.

[0091] See Figure 7 and Figure 8 The adjusting mechanism includes two adjusting telescopic rods 10. Each adjusting telescopic rod 10 is a pneumatic or hydraulic cylinder. The cylinder bodies of both adjusting telescopic rods 10 are fixedly mounted on the top surface of the rotating seat 7. The piston rods of both adjusting telescopic rods 10 are both downward-facing, and each piston rod is fixedly fitted with an adjusting pin 101. One adjusting pin 101 engages with an elongated hole 91 on a support seat 9.

[0092] The working principle of the regulating mechanism is as follows: See Figures 15 to 16 The state changes as follows: when the piston rods of the two adjusting telescopic rods 10 extend downwards, the adjusting pins 101 on the piston rods of the two adjusting telescopic rods 10 push the lower wall of the elongated hole 91 on the support seat 9, causing the two support seats 9 to rotate toward each other, bringing the bottoms of the two support seats 9 closer together. Conversely, see [link to other description]. Figures 16 to 15 When the piston rods of the two adjusting telescopic rods 10 retract upwards, the adjusting pins 101 on the piston rods of the two adjusting telescopic rods 10 push the upper wall of the elongated hole 91 on the support seat 9, causing the bottoms of the two support seats 9 to move away from each other.

[0093] See Figure 9 and Figure 10Each of the two support bases 9 is equipped with a lifting telescopic rod and a lifting seat 93. The lifting telescopic rod is used to drive the lifting seat 93 to move up and down on the support base 9. The lifting telescopic component adopts a rodless cylinder 92. The rodless cylinder 92 refers to a cylinder that uses a piston 921 to directly or indirectly connect to an external actuator and make it reciprocate following the piston 921. The rodless cylinder 92 has the advantage of saving installation space. The rodless cylinder 92 is fixedly installed on the support base 9, and the lifting seat 93 is fixedly installed on the piston 921 of the rodless cylinder 92. The lifting seat 93 is vertically slidingly engaged with the support base 9.

[0094] See Figure 12 A laser 20 is fixedly mounted on one lifting base 93, and a grinder 30 is fixedly mounted on the other lifting base 93. The grinder 30 includes a grinder motor and a grinder head. The grinder motor is fixedly mounted on the lifting base 93, and the grinder head is fixedly mounted on the output shaft of the grinder motor. When the grinder motor is started, the output shaft of the grinder motor drives the grinder head to rotate, and the rotating grinder head can perform grinding operations.

[0095] Example 2:

[0096] This embodiment 2 is a further improvement on embodiment 1:

[0097] See Figure 13 The rotating base 7 is also equipped with a wire feeding mechanism, which is used to feed the metal wire 50 to the laser 20.

[0098] See Figure 11 and Figure 13 The fixed base 6 has a central hole 61, and the top surface of the rotating base 7 is fixedly mounted with a central cylinder 71, which is located inside the central hole 61. When the power mechanism drives the rotating base 7 to rotate around the fixed base 6, the central cylinder 71 rotates inside the central hole 61.

[0099] See Figure 13 A guide seat 201 is fixedly installed on the side of the laser 20, and a guide hole is provided on the guide seat 201.

[0100] See Figure 13 , Figure 14 and Figure 15The wire feeding mechanism includes a wire feeding base 401, a winding roller 402, a frame 403, a wire feeding roller 404, a wire feeding gear 405, and a wire feeding motor 406. The wire feeding base 401 is fixedly installed on the top of the central cylinder 71. The winding roller 402 is rotatably connected to the wire feeding base 401. The frame 403 is fixedly installed on the bottom of the rotating base 7. Two wire feeding rollers 404 are rotatably connected to the frame 403. Each of the two wire feeding rollers 404 is fixedly equipped with a wire feeding gear 405, which meshes with each other. The frame 403 is also fixedly equipped with a wire feeding motor 406, the output shaft of which is fixedly connected to one of the wire feeding rollers 404. A metal wire 50 is wound around the surface of the winding roller 402. One end of the metal wire 50 passes sequentially through the central cylinder 71, the gap between the two wire feeding rollers 404, and a guide hole before extending to the bottom of the laser 20.

[0101] When the power mechanism drives the rotating seat 7 to rotate around the fixed seat 6, the rotating seat 7 drives the central cylinder 71, the central cylinder 71 drives the wire feeding seat 401, the wire feeding seat 401 drives the winding roller 402 to rotate together, and the rotating seat 7 also drives the frame 403, the frame 403 drives the wire feeding roller 404, the wire feeding gear 405 and the wire feeding motor 406 to rotate together, so that the wire feeding mechanism can rotate with the rotating seat 7, which can prevent the metal wire 50 from getting tangled on the fixed seat 6.

[0102] The working principle of the wire feeding mechanism is as follows: After the wire feeding motor 406 is started, the output shaft of the wire feeding motor 406 drives a wire feeding roller 404 to rotate. Since the wire feeding gears 405 at the ends of the two wire feeding rollers 404 mesh with each other, the two wire feeding rollers 404 rotate relative to each other, so that the metal wire 50 located between the two wire feeding rollers 404 is transmitted downward to the bottom of the laser 20. Since the metal wire 50 is wound on the winding roller 402, the metal wire 50 drives the winding roller 402 to rotate, so that the metal wire 50 on the winding roller 402 is released.

[0103] Example 3:

[0104] This embodiment 3 is an improvement upon embodiment 2:

[0105] A laser welding device for a composite profile machine tool also includes a centering mechanism.

[0106] See Figure 17 , Figure 18 , Figure 19 and Figure 20The centering mechanism includes a mounting plate 601, a clamping plate 602, and an elastic element 603. The mounting plate 601 is fixedly mounted to the bottom of the rotating seat 7. A wire-passing cavity 6011 is provided between the mounting plate 601 and the rotating seat 7 for the passage of the metal wire 50. The mounting plate 601 has two radial holes 6012, and a clamping plate 602 is disposed within one of the radial holes 6012, slidingly engaging with the radial hole 6012 radially. Both clamping plates 602 have arc-shaped guide surfaces 6021 on their respective bottom sides facing each other, and arc-shaped clamping surfaces 6022 on their respective upper sides facing each other. The elastic element 603 is disposed within the radial hole 6012 and is a spring; the elastic element 603 is used to push the two clamping plates 602 closer together. From a horizontal perspective, the two clamping plates 602 are perpendicular to the two support seats 9, that is, the angle between the clamping plates 602 and the support seats 9 is 90°.

[0107] The working principle of the centering mechanism is as follows: When the profile 70 is placed on the worktable 2 and the rotating workpiece 80 is placed on the profile 70, the vertical movement mechanism drives the fixed seat 6 to move downward. The fixed seat 6 drives the rotating seat 7 to move downward, and the rotating seat 7 drives the centering mechanism to move downward together. The two clamping plates 602 in the centering mechanism move downward. Because both clamping plates 602 have arc-shaped guide surfaces 6021 on the bottom of their sides facing each other, as the two clamping plates 602 move downward, the arc-shaped guide surfaces 6021 will abut against the top of the rotating workpiece 80. The clamping plate 602 continues to move downward, and the arc-shaped guide surface 6021 slides down along the top of the rotating workpiece 80. Both clamping plates 602 overcome the elastic force of the elastic element 603 and move away from each other, so that the distance between the two clamping plates 602 is large enough to clamp the rotating workpiece 80. When the two clamping plates 602 clamp the rotating workpiece 80, the arc-shaped clamping surfaces 6022 of the two clamping plates 602 clamp the outer side wall of the rotating workpiece 80. At this time, the axis of the rotating workpiece 80, the axis of the central cylinder 71, and the rotation center of the rotating seat 7 coincide.

[0108] Example 4:

[0109] A method for using a laser welding device for a profile composite machine tool, based on the laser welding device for a profile composite machine tool of Embodiment 1, includes the following steps when welding a rotating workpiece 80 onto a profile 70, wherein the rotating workpiece 80 is a circular tube:

[0110] (1) The worker manually places the profile 70 on the workbench 2 and then places the pipe fitting on the target position of the profile 70; or, the worker uses an industrial robot to place the profile 70 on the workbench 2 and then places the pipe fitting on the target position of the profile 70.

[0111] (2) The horizontal movement mechanism drives the fixed seat 6 to move horizontally, and the vertical movement mechanism drives the fixed seat 6 to move vertically, so that the fixed seat 6 moves directly above the pipe fitting; the vertical movement mechanism drives the fixed seat 6 to move downward and approach the pipe fitting, the fixed seat 6 drives the rotating seat 7 to move downward and approach the pipe fitting, the rotating seat 7 drives the two support seats 9 to move downward and approach the pipe fitting, and the laser 20 and the grinder 30 on the support seats 9 move downward and approach the pipe fitting.

[0112] (3) See Figure 16 The adjustment mechanism reduces the bottom distance between the two support seats 9, causing both the laser 20 and the grinder 30 to tilt towards the tube; the piston 921 of the rodless cylinder 92 on the support seat 9 where the laser 20 is located moves downward, reducing the distance between the laser 20 and the tube; the piston 921 of the rodless cylinder 92 on the support seat 9 where the grinder 30 is located moves downward, reducing the distance between the grinder 30 and the tube; the laser 20 uses the laser beam to partially melt the bottom of the tube, causing the tube to be spot welded to the profile 70.

[0113] (4) The power mechanism drives the rotating seat 7 to rotate horizontally around the fixed seat 6. The rotating seat 7 drives the laser 20 and the grinder 30 to rotate together around the tube. When the laser 20 rotates around the tube, it melts the bottom ring of the tube, welding the bottom of the tube to the profile 70 and forming a circular weld at the weld joint. When the grinder 30 rotates around the tube, it grinds the weld between the tube and the profile 70. This allows the welding and grinding operations to be carried out simultaneously, which is beneficial to improving processing efficiency.

[0114] (5) The piston 921 of the rodless cylinder 92 on the support 9 where the laser 20 is located moves upward, which increases the distance between the laser 20 and the tube; the piston 921 of the rodless cylinder 92 on the support 9 where the grinder 30 is located moves upward, which increases the distance between the grinder 30 and the tube; the adjustment mechanism increases the bottom distance between the two support 9s, so that the laser 20 and the grinder 30 both move away from the tube; the vertical movement mechanism drives the fixed seat 6 to move upward, the fixed seat 6 drives the rotating seat 7 to move upward, and the rotating seat 7 drives the laser 20 and the grinder 30 to move upward away from the tube.

[0115] Example 5:

[0116] The method of use in Example 4 is to use a laser beam to directly melt the bottom of the pipe fitting, so that the pipe fitting is welded to the profile 70.

[0117] The method of use in this embodiment 5 is based on the laser welding device of a profile composite machine tool in embodiment 2. In embodiment 2, a wire feeding mechanism was added. Therefore, this embodiment 5 welds the pipe fitting onto the profile 70 by melting the metal wire 50, including the following steps:

[0118] (1) The worker manually places the profile 70 on the workbench 2 and then places the pipe fitting on the target position of the profile 70; or, the worker uses an industrial robot to place the profile 70 on the workbench 2 and then places the pipe fitting on the target position of the profile 70.

[0119] (2) The horizontal movement mechanism drives the fixed seat 6 to move horizontally, and the vertical movement mechanism drives the fixed seat 6 to move vertically, so that the fixed seat 6 moves directly above the pipe fitting; the vertical movement mechanism drives the fixed seat 6 to move downward and approach the pipe fitting, the fixed seat 6 drives the rotating seat 7 to move downward and approach the pipe fitting, the rotating seat 7 drives the two support seats 9 to move downward and approach the pipe fitting, and the laser 20 and the grinder 30 on the support seats 9 move downward and approach the pipe fitting.

[0120] (3) The adjustment mechanism reduces the bottom distance between the two support seats 9, so that the laser 20 and the polisher 30 are tilted towards the tube; the piston 921 of the rodless cylinder 92 on the support seat 9 where the laser 20 is located moves down, so that the distance between the laser 20 and the tube is reduced; the piston 921 of the rodless cylinder 92 on the support seat 9 where the polisher 30 is located moves down, so that the distance between the polisher 30 and the tube is reduced; the wire feeding mechanism feeds the metal wire 50 to the bottom of the laser 20, and the laser 20 uses the laser beam to melt the end of the metal wire 50 first, so that the tube and the profile 70 are spot welded together.

[0121] (4) The power mechanism drives the rotating seat 7 to rotate horizontally around the fixed seat 6. The rotating seat 7 drives the wire feeding mechanism, the laser 20, and the grinder 30 to rotate around the pipe. When the laser 20 rotates around the pipe, it melts the metal wire 50 onto the connection between the pipe and the profile 70, forming a circular weld at the connection. When the grinder 30 rotates around the pipe, it grinds the weld between the pipe and the profile 70. This allows the welding and grinding operations to be carried out simultaneously, which is beneficial to improving processing efficiency.

[0122] (5) The piston 921 of the rodless cylinder 92 on the support 9 where the laser 20 is located moves upward, which increases the distance between the laser 20 and the tube; the piston 921 of the rodless cylinder 92 on the support 9 where the grinder 30 is located moves upward, which increases the distance between the grinder 30 and the tube; the adjustment mechanism increases the bottom distance between the two support 9s, so that the laser 20 and the grinder 30 both move away from the tube; the vertical movement mechanism drives the fixed seat 6 to move upward, the fixed seat 6 drives the rotating seat 7 to move upward, and the rotating seat 7 drives the laser 20 and the grinder 30 to move upward away from the tube.

[0123] Example 6:

[0124] The usage method of this embodiment 6 is based on the laser welding device for a profile composite machine tool of embodiment 3. Embodiment 3 is an improvement on embodiment 2, in which a wire feeding mechanism is added and a centering mechanism is added. When welding pipe fittings onto the profile 70, the following steps are included:

[0125] (1) The worker manually places the profile 70 on the workbench 2 and then places the pipe fitting on the target position of the profile 70; or, the worker uses an industrial robot to place the profile 70 on the workbench 2 and then places the pipe fitting on the target position of the profile 70.

[0126] (2) The horizontal movement mechanism drives the fixed seat 6 to move horizontally, and the vertical movement mechanism drives the fixed seat 6 to move vertically, so that the fixed seat 6 moves directly above the pipe fitting; the vertical movement mechanism drives the fixed seat 6 to move downwards and approach the pipe fitting, and the fixed seat 6 drives the rotating seat 7 to move downwards and approach the pipe fitting. On the one hand, the rotating seat 7 drives the two support seats 9 to move downwards and approach the pipe fitting, and the laser 20 and the grinder 30 on the support seats 9 move downwards and approach the pipe fitting. On the other hand, the rotating seat 7 drives the mounting plate 601 to move downwards and approach the pipe fitting, and the mounting plate 601 drives the two clamping plates 602 to move downwards and approach the pipe fitting; as the two clamping plates 602 move downwards, the two clamping plates 602 gradually clamp the outer wall of the pipe fitting, so that the axis of the pipe fitting, the axis of the central cylinder 71 and the rotation center of the rotating seat 7 coincide.

[0127] (3) The adjustment mechanism reduces the bottom distance between the two support seats 9, so that the laser 20 and the polisher 30 are tilted towards the pipe; the piston 921 of the rodless cylinder 92 on the support seat 9 where the laser 20 is located moves down, so that the distance between the laser 20 and the pipe is reduced; the piston 921 of the rodless cylinder 92 on the support seat 9 where the polisher 30 is located moves down, so that the distance between the polisher 30 and the pipe is reduced; the wire feeding mechanism feeds the metal wire 50 to the bottom of the laser 20, and the laser 20 uses the laser beam to melt the end of the metal wire 50, so that the pipe and the profile 70 are spot welded together, thereby realizing the positioning of the pipe.

[0128] (4) The power mechanism drives the rotating seat 7 to rotate horizontally around the fixed seat 6. The rotating seat 7 drives the wire feeding mechanism, the two clamping plates 602, the laser 20 and the grinder 30 to rotate around the pipe together. The laser 20 melts the metal wire 50 onto the connection between the pipe and the profile 70, so that the connection between the pipe and the profile 70 forms a circular weld. The grinder 30 grinds the weld between the pipe and the profile 70, so that the welding operation and the grinding operation can be carried out simultaneously, which is conducive to improving the processing efficiency. In addition, since the two clamping plates 602 are perpendicular to the two support seats 9 at the horizontal angle, the two clamping plates 602 can separate the laser 20 and the grinder 30, prevent the debris from the grinder 30 from splashing into the laser area of ​​the laser 20, and prevent the debris from getting mixed into the weld, which is conducive to ensuring the quality of the weld.

[0129] (5) The piston 921 of the rodless cylinder 92 on the support 9 where the laser 20 is located moves upward, which increases the distance between the laser 20 and the tube; the piston 921 of the rodless cylinder 92 on the support 9 where the grinder 30 is located moves upward, which increases the distance between the grinder 30 and the tube; the adjustment mechanism increases the bottom distance between the two support 9s, so that the laser 20 and the grinder 30 both move away from the tube; the vertical movement mechanism drives the fixed seat 6 to move upward, the fixed seat 6 drives the rotating seat 7 to move upward, and the rotating seat 7 drives the laser 20, the grinder 30 and the two clamping plates 602 to move upward away from the tube.

[0130] Summarize:

[0131] Through the description of Examples 1 to 6, it can be seen that a laser welding device for a profile composite machine tool has the following advantages:

[0132] First, because the power mechanism can drive the rotating seat 7 to rotate around the fixed seat 6, and the support seat 9 where the laser 20 and the grinder 30 are located are both installed on the rotating seat 7, when welding the rotating workpiece 80 onto the profile 70, both the laser 20 and the grinder 30 can rotate around the rotating workpiece 80 so that welding and grinding operations can be performed simultaneously, thereby improving processing efficiency.

[0133] Secondly, when the rotating seat 7 does not rotate around the fixed seat 6, the horizontal and vertical movement mechanisms can be used to drive the laser 20 and the grinder 30 to move together in the horizontal or vertical direction, so that welding and grinding operations in the straight direction can be performed simultaneously. This allows the device to process not only circular welds but also straight welds at the same time, improving its flexibility and adaptability.

[0134] Third, as can be seen from steps (3) of Embodiment 4, Step (3) of Embodiment 5 and Step (3) of Embodiment 6, by setting a rodless cylinder 92 on the support base 9, the lifting base 93 can be driven to bring the laser 20 or the grinder 30 close to the rotating workpiece 80, so that the distance between the laser 20 and the grinder 30 and the rotating workpiece 80 is adjustable, which improves the flexibility of use.

[0135] Fourth, the method of use in Example 4 achieves laser welding, and in the methods of use in Examples 5 and 6, because a wire feeding mechanism is used, laser wire-filled welding can be achieved. This enables the device to perform different types of laser welding operations, further improving its adaptability and flexibility of use.

[0136] Fifth, because the wire feeding mechanism has the wire feeding seat 401 fixedly mounted on the central cylinder 71 and the winding roller 402 with the metal wire 50 rotatably mounted on the wire feeding seat 401, and the central cylinder 71 fixedly mounted on the rotating seat 7, when the power mechanism drives the rotating seat 7 to rotate around the fixed seat 6, the rotating seat 7 drives the central cylinder 71, the central cylinder 71 drives the wire feeding seat 401, the wire feeding seat 401 drives the winding roller 402 to rotate together, and the rotating seat 7 also drives the frame 403, the frame 403 drives the wire feeding roller 404, the wire feeding gear 405 and the wire feeding motor 406 to rotate together, so that the wire feeding mechanism can rotate with the rotating seat 7, which can prevent the metal wire 50 from getting tangled on the fixed seat 6, and avoid the wire feeding being blocked due to the metal wire 50 getting tangled on the fixed seat 6, thus improving the reliability of wire feeding.

[0137] Sixth, as can be seen from step (2) of Embodiment 6, when the rotating seat 7 drives the two clamping plates 602 in the centering mechanism to move down together, the arc-shaped clamping surfaces 6022 of the two clamping plates 602 can gradually clamp the outer wall of the pipe fitting, so that the axis of the pipe fitting, the axis of the central cylinder 71, and the rotation center of the rotating seat 7 coincide. As can be seen from step (3) of Embodiment 6, when spot welding is performed, the two clamping plates 602 can be used to stably clamp the pipe fitting, prevent the pipe fitting from moving, and improve the accuracy and stability of spot welding.

[0138] Seventh, as can be seen from step (4) of embodiment 6, since the two clamping plates 602 in the centering mechanism are perpendicular to the two support seats 9 at the horizontal angle, and the clamping plates 602, laser 20 and grinder 30 rotate together with the rotating seat 7, the two clamping plates 602 can always separate laser 20 and grinder 30, preventing the debris from being ground by grinder 30 from splashing into the laser welding area of ​​laser 20, preventing debris from getting mixed into the weld, which is beneficial to ensuring the quality of the weld.

[0139] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A laser welding device for a profile composite machine tool, comprising a bed, a transverse traversing mechanism on the upper part of the bed, a longitudinal traversing mechanism on the transverse traversing mechanism, a vertical traversing mechanism on the longitudinal traversing mechanism, a laser and a grinder on the vertical traversing mechanism, and a worktable on the lower part of the bed, characterized in that, The vertical movement mechanism is provided with a fixed seat, and the fixed seat is provided with a rotating seat and a power mechanism. The power mechanism is used to drive the rotating seat to rotate horizontally around the fixed seat. The power mechanism includes a power motor, a power gear and a power gear ring. The power motor is located on the top of the fixed seat, the power gear is located on the output shaft of the power motor, and the power gear ring is located on the top of the rotating seat. The power gear and the power gear ring cooperate with each other. The rotating base is equipped with an adjustment mechanism and two support bases. The top of each support base is rotatably connected to the rotating base on the side facing each other. The top of each support base is provided with an elongated hole. The adjustment mechanism is used to adjust the bottom distance between the two support bases. The adjustment mechanism includes two adjusting telescopic rods. Both adjusting telescopic rods are located on the rotating base. The bottom of each adjusting telescopic rod is provided with an adjusting pin. One adjusting pin cooperates with an elongated hole on one of the support bases. Both support bases are equipped with a lifting telescopic rod and a lifting seat. The lifting telescopic rod is used to drive the lifting seat to rise and fall on the support base. The lifting telescopic rod adopts a rodless cylinder. The piston of the rodless cylinder is connected to the lifting seat. One lifting seat is equipped with the laser, and the other lifting seat is equipped with the grinder. It also includes a centering mechanism, which includes a mounting plate, clamping plates and elastic elements. The mounting plate is located at the bottom of the rotating seat. Two clamping plates are slidably connected to the mounting plate. Both clamping plates have arc-shaped guide surfaces at the bottom of their sides facing each other, and arc-shaped clamping surfaces at the top of their sides facing each other. An elastic element is also provided on the base plate. The elastic element pushes the two clamping plates closer to each other. The two clamping plates are perpendicular to the two support seats at a horizontal angle. The rotating base is also equipped with a wire feeding mechanism for feeding metal wire to the laser. The fixed base has a central hole, and the rotating base has a central cylinder located inside the central hole. A wire routing cavity is provided between the mounting plate and the rotating base. A guide seat is provided on the side of the laser, and the guide seat has a guide hole. The wire feeding mechanism includes a wire feeding seat, a winding roller, a frame, a wire feeding roller, a wire feeding gear, and a wire feeding motor. The wire feeding seat is located at the top of the central cylinder, and the winding roller is rotatably connected to the wire feeding seat. The frame is located at the bottom of the rotating base, and two wire feeding rollers are rotatably connected to the frame. Both wire feeding rollers are equipped with wire feeding gears, and the two wire feeding gears cooperate. The frame is also equipped with a wire feeding motor, and the output shaft of the wire feeding motor is connected to one of the wire feeding rollers. Metal wire is wound on the surface of the winding roller, and one end of the metal wire passes through the central cylinder, the wire routing cavity, the gap between the two wire feeding rollers, and the guide hole in sequence before extending to the bottom of the laser.

2. A method for using a laser welding device for a profile composite machine tool, characterized in that, The laser welding apparatus for a profile composite machine tool according to claim 1 includes the following steps when welding a rotating workpiece onto a profile: (1) Place the profile on the worktable and place the rotating workpiece on the target position of the profile; (2) The horizontal movement mechanism and the vertical movement mechanism drive the fixed seat to move above the rotating workpiece, the vertical movement mechanism drives the fixed seat to move down, the fixed seat drives the rotating seat to move down, the rotating seat drives the mounting plate to move down, the mounting plate drives the two clamping plates to move down, so that the two clamping plates gradually clamp the rotating workpiece, and the axis of the rotating workpiece coincides with the rotation center of the rotating seat. (3) The adjustment mechanism reduces the bottom distance between the two support seats so that the laser and the grinder are facing the rotating workpiece. The wire feeding mechanism feeds the metal wire below the laser and the laser melts the end of the metal wire so that the rotating workpiece and the profile are spot welded together. (4) The power mechanism drives the rotating seat to rotate horizontally around the fixed seat. The rotating seat drives the wire feeding mechanism, two clamping plates, laser and grinder to rotate around the rotating workpiece. The laser melts the metal wire at the connection between the rotating workpiece and the profile, so that a circular weld is formed at the connection between the rotating workpiece and the profile. The grinder grinds the circular weld. (5) The adjustment mechanism increases the bottom distance between the two support seats so that the laser and the grinder are both away from the rotating workpiece. The vertical movement mechanism drives the fixed seat to move upward, the fixed seat drives the rotating seat to move upward, and the rotating seat drives the laser, the grinder and the two clamps to move upward away from the rotating workpiece.

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