Metal plate closed laser welding equipment and welding method thereof

Abstract

The invention relates to the technical field of laser welding, in particular to closed laser welding equipment for a metal plate and a welding method of the closed laser welding equipment for the metal plate. Comprising a laser welding device used for metal plate edge sealing welding, a laser source device used for providing a laser light source for the laser welding device, a dust removal device used for removing dust in the laser welding device, an auxiliary control device used for controlling the laser welding device, the laser source device and the dust removal device, and an auxiliary control device used for controlling the laser welding device, the laser source device and the dust removal device. The power supply device is used for controlling power distribution of the auxiliary machine device and the dust removal device; according to the metal plate sealing laser welding equipment, precise edge sealing welding can be conducted on metal plate parts.

Description

Technical Field

[0001] The present invention relates to the technical field of laser welding, and more particularly to sheet metal enclosed laser welding equipment and a welding method thereof. Background Art

[0002] Laser welding has experienced rapid growth in recent years, being considered "the next big thing in laser technology after cutting." As a highly efficient and precise welding method, laser welding offers advantages over traditional welding processes, including reduced heat input per unit area, minimal thermal deformation, a larger weld depth-to-width ratio, high welding speeds, and weld strength generally exceeding that of the parent metal. Its application is expanding, improving both production efficiency and weld quality. Laser welding technology is poised to play a more significant role in the sheet metal processing industry.

[0003] At present, in the sheet metal small parts industry, although most parts are mainly processed by bending, for cubic parts, closed edges always need to be welded. Although laser welding has gradually matured in flat plate welding, laser welding has not been widely used in the sheet metal small parts industry. Traditional manual welding is still used. Manual welding is slow and has low production efficiency. The parts are relatively small, and the manual welding welds are difficult to control. The welding thermal deformation is large, the welding defects are uncontrolled, and the manual welding working conditions are poor, which is extremely harmful to the human body.

[0004] There is a laser welding device, which includes a laser emitting device, a magnetic field generating device and a magnetic field control device. The laser emitting device is used to emit welding laser, and a welding area is formed in the extension direction of the output end of the laser emitting device; the magnetic field generating device is arranged in the extension direction of the output end of the laser emitting device, and the magnetic field generating device is used to generate a magnetic field, and the magnetic field covers the welding area; the magnetic field control device is connected to the magnetic field generating device, and the magnetic field control device is used to control the direction of the magnetic field generated by the magnetic field generating device to reverse.

[0005] The above-mentioned existing laser welding equipment is still for flat plate welding and is difficult to be applied to edge welding of sheet metal parts. Summary of the Invention

[0006] In order to overcome the problem that the laser welding equipment in the prior art is difficult to weld the edge of sheet metal parts, the present invention provides a sheet metal closed laser welding equipment and a welding method thereof.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is: a sheet metal closed laser welding equipment, including a laser welding device for sheet metal edge sealing welding, a laser source device for providing a laser light source to the laser welding device, a dust removal device for removing dust in the laser welding device, a control auxiliary device for controlling the laser welding device, the laser source device, and the dust removal device, a power supply device for distributing power to the laser welding device, the laser source device, the control auxiliary device, and the dust removal device, and a support platform; the laser source device, the control auxiliary device, the dust removal device, and the power supply device are all arranged on the top of the support platform, and the laser welding device is arranged at the bottom of the support platform; the laser source device, the laser welding device, and the dust removal device are all electrically connected to the control auxiliary device.

[0008] The laser source device provides a laser source to the laser welding device. The laser welding device uses laser to perform edge welding on sheet metal parts. The dust removal device removes dust and impurities in the laser welding device to ensure that the working environment in the laser welding device meets the laser welding working environment requirements and environmental protection requirements. The control auxiliary device is used to control the start and stop of the laser source device, the dust removal device, and the laser welding device, as well as to control the movement of the laser welding device during operation. The support platform is used to set up the control auxiliary device, the dust removal device, and the laser source device above the laser welding device, which can make full use of the vertical space and reduce the footprint of the entire device.

[0009] Furthermore, the laser welding device includes a base, a protective cover, a laser welding head, a welding head moving mechanism and several clamping moving mechanisms; the laser welding head is arranged on the welding head moving mechanism, and the laser welding head is power-connected to the welding head moving mechanism; the welding head moving mechanism and the clamping moving mechanism are both arranged on the top of the base, and the laser welding head is located above the clamping moving mechanism; the protective cover is arranged on the top of the base, and the protective cover is arranged above the laser welding head, the welding head moving mechanism and the clamping moving mechanism.

[0010] Furthermore, the welding head moving mechanism includes a transverse moving shaft, a longitudinal moving shaft, and a lifting shaft; the transverse moving shaft is provided at the top of the base; the longitudinal moving shaft is slidably mounted on the transverse moving shaft, and the transverse moving shaft is provided with a transverse driving mechanism for driving the longitudinal moving shaft to slide along the transverse moving shaft; the lifting shaft is slidably mounted on the longitudinal moving shaft, and the longitudinal moving shaft is provided with a longitudinal driving mechanism for driving the lifting shaft to slide along the longitudinal moving shaft; the laser welding head is slidably mounted on the lifting shaft, and the lifting shaft can drive the laser welding head to slide up and down along the lifting shaft. Furthermore, the clamping moving mechanism includes a clamping assembly for clamping sheet metal parts, an in-and-out shaft, and an in-and-out driving member; the in-and-out shaft is provided at the top of the base, and the clamping assembly is slidably mounted on the in-and-out shaft; the in-and-out driving member is provided on the in-and-out shaft, and the in-and-out driving member drives the clamping assembly to slide along the in-and-out shaft.

[0011] Furthermore, the base includes a loading and unloading area and a welding area; one end of the inlet and outlet shaft is located in the loading and unloading area, and the other end is located in the welding area; the welding head moving mechanism is located in the welding area, and the protective cover is located at the top of the welding area; a grating is provided on the top of the base in the loading and unloading area.

[0012] Furthermore, the clamping assembly includes a connecting plate, a clamp body for firmly clamping sheet metal parts, a plurality of slide rails and a drive cylinder; the connecting plate is slidably arranged on the inlet and outlet shafts; the slide rails are arranged on the top of the connecting plate, the clamp body is slidably arranged on the slide rails, the drive cylinder is arranged on the connecting plate, and the drive cylinder is dynamically connected to the clamp body, and the drive cylinder drives the clamp body to slide along the slide rails.

[0013] Furthermore, the clamp body includes a bottom plate, a top plate, a plurality of connecting rods, a plurality of side pressure cylinders and a plurality of front pressure cylinders; the bottom plate is slidably arranged on a slide rail, the connecting rod is arranged on the top of the bottom plate, the top plate is arranged on the top of the connecting plate, and the upper surface of the top plate is provided with a plurality of placement areas for placing sheet metal parts; the top plate is provided with a plurality of side stop rods at the side position close to the placement area in one direction, and a plurality of front stop rods at the side position close to the placement area in another direction; the side pressure cylinder is provided on the top plate, and the output end of the side pressure cylinder faces the side stop rod, and a side pressure block is provided on the output end of the side pressure cylinder; the front pressure cylinder is provided on the top plate, and the output end of the front pressure cylinder faces the front stop rod, and a front pressure block is provided on the output end of the front pressure cylinder.

[0014] Furthermore, the clamp body also includes a number of upper pressing cylinders for applying force to the sheet metal parts toward the placement area, and the upper pressing cylinders are arranged on the top plate; a pressure rod is provided on the top of the top plate, and one end of the pressure rod is provided with an upper pressure block for abutting against the sheet metal parts, and the other end is connected to the output end of the upper pressing cylinder, and the middle part of the pressure rod is hinged to the top plate; the upper pressure block is located above the placement area.

[0015] Furthermore, the clamping assembly also includes a plurality of buffer limiters for preventing the movement of the clamp body. The buffer limiters are arranged on the connecting plate and located at both ends of the travel direction of the slide rail.

[0016] On the other hand, the present invention also provides a method for edge sealing welding of sheet metal parts using sheet metal closed laser welding equipment, comprising the following steps: S1. The clamping assembly slides along the in-and-out axis to the loading and unloading area under the drive of the in-and-out drive member, and the sheet metal part to be welded is placed on the placement area; S2. The output end of the front clamping cylinder pushes the sheet metal part against the front stopper. The output end of the side clamping cylinder pushes the sheet metal part against the side stopper. The output end of the upper clamping cylinder extends, driving the end of the pressure rod with the upper pressure block to abut the top of the sheet metal part, pressing the sheet metal part against the placement area, completing the fixing of the sheet metal part. S3. The in-and-out drive member drives the clamping assembly to slide along the in-and-out axis to the welding area. The drive cylinder drives the fixture body to slide to the set position. The transverse drive mechanism drives the longitudinal movable axis to the set position. The longitudinal drive mechanism drives the lifting axis to move above the sheet metal part. The lifting drive mechanism drives the laser welding head to a position close to the weld seam of the sheet metal part. S4. Start the laser welding head. The laser welding head moves along the weld trajectory of the sheet metal part under the drive of the lifting drive mechanism, the transverse drive mechanism, and the longitudinal drive mechanism until the weld of the sheet metal part is completed. S5. After welding is completed, the lifting drive mechanism drives the laser welding head to lift, and the in-and-out drive part drives the clamping assembly to slide along the in-and-out axis to the loading and unloading area. The output ends of the front clamping cylinder and the side clamping cylinder are away from the sheet metal parts, and the output end of the upper clamping cylinder retracts. The pressure rod drives the upper pressure block away from the sheet metal parts. At this time, the welded sheet metal parts can be removed from the fixture body.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The laser welding device uses laser to weld the edges of sheet metal parts. The dust removal device removes dust and impurities inside the laser welding device to ensure that the working environment inside the laser welding device meets the laser welding working environment requirements and environmental protection requirements. The support platform is used to set up the control auxiliary device, dust removal device, and laser source device above the laser welding device, which can fully utilize the vertical space and reduce the floor space of the entire device. 2. By setting up a protective cover, the laser welding operation of sheet metal parts is carried out under the cover of the protective cover, which can prevent the laser from causing radiation damage to the workers around the entire device; 3. By setting the horizontal and vertical moving axes, as well as the lifting axis, precise control of the laser welding head in the horizontal direction (x-axis), vertical direction (y-axis), and vertical direction (z-axis) is achieved, thus ensuring that the laser welding head can accurately weld the edges of small sheet metal parts. 4. By setting up the loading and unloading area and the welding area on the base, and the protective cover is only set in the welding area, the clamping assembly can move between the loading and unloading area and the welding area along the in-and-out axis under the drive of the in-and-out drive member. This not only facilitates the operator to perform loading and unloading operations, but also ensures that the protective cover can fully protect the operator during welding; 5. The fixture body can slide along the slide rail on the connecting plate, so that when the connecting plate moves to the loading and unloading area or welding area, the position of the fixture body can be adjusted to achieve more convenient loading and unloading or cooperate with the laser welding head to achieve more precise welding effect; 6. Through the cooperation of the side clamping cylinder and the side stop rod, the cooperation of the front clamping cylinder and the front stop rod, and the cooperation of the upper clamping cylinder and the pressure rod, the sheet metal parts can be placed more firmly in the placement area, which is convenient for welding operations. At the same time, the output ends of the front clamping cylinder, the side clamping cylinder and the upper clamping cylinder can also be kept away from the sheet metal parts at the same time, improving the efficiency of the operator's loading and unloading operations; 7. By setting up a buffer limit component, the sliding stroke of the fixture body on the slide rail can be limited, making it easier for the operator to make adjustments according to actual conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a sheet metal enclosed laser welding device of the present invention; Figure 2 This is a schematic structural diagram of a laser welding device in an embodiment of a sheet metal enclosed laser welding device of the present invention; Figure 3 This is a schematic diagram of the internal structure of a laser welding device in an embodiment of a sheet metal closed laser welding device of the present invention; Figure 4 This is a schematic structural diagram of a clamping assembly in an embodiment of a sheet metal enclosed laser welding device of the present invention; Figure 5 This is a structural diagram of a fixture body in an embodiment of a sheet metal enclosed laser welding device of the present invention; Figure 6 This is a structural schematic diagram from another perspective of the fixture body in an embodiment of a sheet metal closed laser welding device of the present invention.

[0019] In the accompanying drawings: In the accompanying drawings: 1. Laser welding device; 11. Base; 111. Loading and unloading area; 112. Welding area; 12. Protective cover; 121. Lifting baffle; 13. Laser welding head; 14. Welding head moving mechanism; 141. Transverse moving axis; 142. Longitudinal moving axis; 143. Lifting axis; 144. Transverse driving mechanism; 1441. Rack; 1442. Guide rail; 1443. Horizontal driving motor; 145. Longitudinal driving mechanism; 146. Mounting plate; 15. Grating; 16. Clamping moving mechanism; 161. Clamping assembly; 1611. Connecting plate; 1612. Slide rail; 1613. Driving cylinder; 1614. Slider; 1615. Buffer limiter; 16151. Limit block; 161 52. Limit rod; 16153. Buffer rod; 162. In-and-out shaft; 163. In-and-out drive member; 2. Laser source device; 3. Control auxiliary device; 4. Dust removal device; 5. Power supply device; 6. Support platform; 7. Laser source cooling device; 8. Air duct opening; 9. Monitor; 10. Fixture body; 101. Placement area; 102. Bottom plate; 103. Top plate; 104. Connecting rod; 105. Side clamping cylinder; 106. Front clamping cylinder; 107. Side stop rod; 108. Front stop rod; 109. Front clamping block; 1010. Side clamping block; 1011. Fixing plate; 1012. Upper clamping cylinder; 1013. Pressure rod; 1014. Upper pressure block; 1015. Support rod; 1016. Mounting block; 17. Sheet metal parts. DETAILED DESCRIPTION

[0020] The drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate the embodiments, some components in the drawings may be omitted, enlarged, or reduced in size, and do not represent actual product dimensions. Those skilled in the art will understand that some well-known structures and their descriptions may be omitted from the drawings. The positional relationships depicted in the drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0021] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "long", "short", etc. indicating the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0022] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings: Example 1 Reference Figures 1 to 6 , which is embodiment 1 of a sheet metal closed laser welding equipment of the present invention, including a laser welding device 1 for sheet metal edge sealing welding, a laser source device 2 for providing a laser light source to the laser welding device 1, a dust removal device 4 for removing dust in the laser welding device 1, a control auxiliary device 3 for controlling the laser welding device 1, the laser source device 2, and the dust removal device 4, a power supply device 5 for distributing power to the laser welding device 1, the laser source device 2, the control auxiliary device 3, and the dust removal device 4, and a support platform 6; the laser source device 2, the control auxiliary device 3, the dust removal device 4, and the power supply device 5 are all arranged on the top of the support platform 6, and the laser welding device 1 is arranged at the bottom of the support platform 6; the laser source device 2, the laser welding device 1, and the dust removal device 4 are all electrically connected to the control auxiliary device 3.

[0023] Specifically, the laser source device 2 provides a laser source to the laser welding device 1, and the laser welding device 1 uses laser light to perform edge welding on the sheet metal parts 17. The dust removal device 4 removes dust and impurities in the laser welding device 1 to ensure that the working environment in the laser welding device 1 meets the laser welding working environment requirements and environmental protection requirements. The control auxiliary device 3 is used to control the start and stop of the laser source device 2, the dust removal device 4, and the laser welding device 1, as well as to control the operation of the laser welding device 1. The support platform 6 is used to set up the control auxiliary device 3, the dust removal device 4, and the laser source device 2 above the laser welding device 1, which can make full use of the vertical space and reduce the floor space of the entire device. The side of the support platform 6 is also provided with stairs to facilitate technicians to walk up to the support platform 6 to operate. A laser source cooling device 7 is also provided on the top of the support platform 6, which is used to cool the laser source device 2 and maintain the laser source device 2 at a suitable working temperature.

[0024] In this embodiment, the laser welding device 1 includes a base 11, a protective cover 12, a laser welding head 13, a welding head moving mechanism 14 and a plurality of clamping moving mechanisms 16; the laser welding head 13 is arranged on the welding head moving mechanism 14, and the laser welding head 13 is power-connected to the welding head moving mechanism 14; the welding head moving mechanism 14 and the clamping moving mechanism 16 are both arranged on the top of the base 11, and the laser welding head 13 is located above the clamping moving mechanism 16; the protective cover 12 is arranged on the top of the base 11, and the protective cover 12 is arranged above the laser welding head 13, the welding head moving mechanism 14 and the clamping moving mechanism 16.

[0025] Specifically, the top of the protective cover 12 is provided with two air duct openings 8. The dust removal device 4 is connected to these openings 8 via ducts, communicating with the interior of the protective cover 12. This allows the dust removal device 4 to extract dust and impurities from the protective cover 12. Laser welding of sheet metal parts 17 is performed beneath the protective cover 12, preventing laser radiation damage to personnel working around the device. A monitor 9 is also provided on the protective cover 12, allowing operators to monitor the work within the protective cover 12.

[0026] In this embodiment, the welding head moving mechanism 14 includes a transverse moving shaft 141, a longitudinal moving shaft 142 and a lifting shaft 143; the transverse moving shaft 141 is arranged on the top of the base 11; the longitudinal moving shaft 142 is slidably installed on the transverse moving shaft 141, and the transverse moving shaft 141 is provided with a transverse driving mechanism 144 for driving the longitudinal moving shaft 142 to slide along the transverse moving shaft 141; the lifting shaft 143 is slidably installed on the longitudinal moving shaft 142, and the longitudinal moving shaft 142 is provided with a longitudinal driving mechanism 145 for driving the lifting shaft 143 to slide along the longitudinal moving shaft 142; the laser welding head 13 is slidably installed on the lifting shaft 143, and the lifting shaft 143 can drive the laser welding head 13 to slide up and down along the lifting shaft 143. Specifically, a lifting driving mechanism is provided on the lifting shaft 143, and the lifting driving mechanism is connected to the laser welding head 13, and the lifting driving mechanism drives the laser welding head 13 to move along the lifting shaft 143.

[0027] Specifically, the longitudinal movable shaft 142 and the transverse movable shaft 141 are both steel pipes with square cross sections. One end of the longitudinal movable shaft 142 in the longitudinal direction is welded to a mounting plate 146 with an "L"-shaped cross section. The transverse drive mechanism 144 includes a rack 1441, a horizontal drive motor 1443, a gear (not shown in the figure), and two guide rails 1442. One guide rail 1442 is located at the top of the transverse movable shaft 141, and the other guide rail 1442 is located on the side wall of the transverse movable shaft 141. The two guide rails 1442 are arranged in parallel, and the mounting plate 146 is provided with two grooves that fit with the guide rails 1442 to facilitate the sliding of the mounting plate 146 along the guide rails 1442. The rack 1441 is located at the top of the transverse movable shaft 141, and the rack 1441 and the guide rail 1442 are connected. 442 are arranged parallel to each other; the horizontal drive motor 1443 is arranged on the mounting plate 146, and the gear is installed on the output end of the horizontal drive motor 1443. The gear is meshed with the rack 1441, and the horizontal drive motor 1443 drives the gear to rotate. Since the gear is meshed with the rack 1441, it can drive the mounting plate 146 to move along the trajectory of the rack 1441. The guide rail 1442 can help support the mounting plate 146, making the mounting plate 146 more stable during movement, thereby achieving the effect of causing the longitudinal movable shaft 142 to slide on the transverse movable shaft 141. The longitudinal drive mechanism 145 is arranged on the side of the longitudinal movable shaft 142. In this embodiment, the longitudinal drive mechanism 145 is a linear screw motor module. The lifting shaft 143 is mounted on the slide of the longitudinal drive mechanism 145. In this embodiment, the lifting shaft 143 is a linear screw motor module. The laser welding head 13 is mounted on the slide of the lifting shaft 143. The lifting shaft 143 is perpendicular to the axis direction of the longitudinal movable shaft 142. By setting a transverse moving axis 141, a longitudinal moving axis 142, and a lifting axis 143, precise control of the transverse direction (x-axis direction), longitudinal direction (y-axis direction), and up and down direction (z-axis direction) of the laser welding head 13 is achieved, thereby ensuring that the laser welding head 13 can accurately perform edge sealing welding on smaller sheet metal parts 17.

[0028] In this embodiment, the clamping moving mechanism 16 includes a clamping assembly 161, an in-and-out shaft 162 and an in-and-out driving member 163 for clamping the sheet metal part 17; the in-and-out shaft 162 is arranged on the top of the base 11, and the clamping assembly 161 is slidably arranged on the in-and-out shaft 162; the in-and-out driving member 163 is arranged on the in-and-out shaft 162, and the in-and-out driving member 163 drives the clamping assembly 161 to slide along the in-and-out shaft 162.

[0029] Specifically, in this embodiment, two clamping and moving mechanisms 16 are provided, spaced apart on top of the base 11. The in-and-out shaft 162 is a screw rod, and the clamping assembly 161 is provided with a nut that engages with the in-and-out shaft 162. The in-and-out drive 163 is a motor, and the in-and-out shaft 162 is connected to the output end of the in-and-out drive 163. When the in-and-out drive 163 is activated, it can drive the in-and-out shaft 162 to rotate, thereby allowing the clamping assembly 161 to slide along the in-and-out shaft 162.

[0030] In this embodiment, the base 11 includes a loading and unloading area 111 and a welding area 112; one end of the inlet and outlet shaft 162 is located in the loading and unloading area 111, and the other end is located in the welding area 112; the welding head moving mechanism 14 is located in the welding area 112, and the protective cover 12 is located at the top of the welding area 112; a grating 15 is provided on the top of the base 11 in the loading and unloading area 111.

[0031] Specifically, when one clamping assembly 161 moves to the loading and unloading area 111 to perform loading and unloading operations, the other clamping assembly 161 moves to the welding area 112 to perform welding. The two clamping assemblies 161 move alternately to achieve a working state of one loading and unloading and one welding, ensuring that there are always sheet metal parts 17 undergoing welding operations, thereby improving work efficiency. There are two groups of gratings 15, both of which are located at the edge of the loading and unloading area 111. Each clamping moving mechanism 16 is located between the transmitting end and the receiving end of the grating 15. When the operator completes loading, he needs to retreat outside the range of the grating 15. At this time, the control auxiliary device 3 will control the clamping assembly 161 to move from the loading and unloading area 111 to the welding area 112. Otherwise, the clamping assembly 161 will not slide to the welding area 112, ensuring that the operator can stay as far away from the welding area 112 as possible during welding, thereby improving work safety. At the same time, a passage is provided at the bottom of the protective cover 12 for the clamping assembly 161 to pass through, and a lifting baffle 121 is provided on the inside of the protective cover 12. The lifting baffle 121 is driven up and down by an electric cylinder. When welding, the lifting baffle 121 is lowered to seal the passage, further reducing the laser radiation to the technician.

[0032] In this embodiment, the clamping assembly 161 includes a connecting plate 1611, a clamp body 10 for firmly clamping the sheet metal part 17, a plurality of slide rails 1612 and a drive cylinder 1613; the connecting plate 1611 is slidably arranged on the inlet and outlet shaft 162; the slide rail 1612 is arranged on the top of the connecting plate 1611, the clamp body 10 is slidably arranged on the slide rail 1612, the drive cylinder 1613 is arranged on the connecting plate 1611, and the drive cylinder 1613 is dynamically connected to the clamp body 10, and the drive cylinder 1613 drives the clamp body 10 to slide along the slide rail 1612.

[0033] Specifically, there are two slide rails 1612, which are arranged in parallel. The drive cylinder 1613 is located between the two slide rails 1612. In this embodiment, the drive cylinder 1613 is a rodless pneumatic cylinder, and the fixture body 10 is mounted on the slider 1614 of the drive cylinder 1613. When the drive cylinder 1613 is activated, the slider 1614 of the drive cylinder 1613 drives the fixture body 10 to move. The slide rails 1612 can ensure more stable sliding of the fixture body 10. This arrangement facilitates adjustment of the position of the fixture body 10 when the connecting plate 1611 moves to the loading and unloading area 111 or the welding area 112, achieving more convenient loading and unloading or more precise welding with the laser welding head.

[0034] In this embodiment, the clamp body 10 includes a bottom plate 102, a top plate 103, a plurality of connecting rods 104, a plurality of side clamping cylinders 105 and a plurality of front clamping cylinders 106; the bottom plate 102 is slidably arranged on the slide rail 1612, the connecting rod 104 is arranged on the top of the bottom plate 102, the top plate 103 is arranged on the top of the connecting plate 1611, and the upper surface of the top plate 103 is provided with a plurality of placement areas 101 for placing sheet metal parts 17; the top plate 103 is located at a side position close to the placement area 101 in one direction. There are several side bars 107, and several front bars 108 are provided at the side position in the other direction close to the placement area 101; the side clamping cylinder 105 is provided on the top plate 103, and the output end of the side clamping cylinder 105 faces the side bar 107, and the output end of the side clamping cylinder 105 is provided with a side clamping block 1010; the front clamping cylinder 106 is provided on the top plate 103, and the output end of the front clamping cylinder 106 faces the front bar 108, and the output end of the front clamping cylinder 106 is provided with a front clamping block 109.

[0035] Specifically, two sliders 1614 are mounted on the bottom of the bottom plate 102 by bolts and are slidably engaged with the slide rails 1612. Two placement areas 101 are provided on the top plate 103 so that each clamp body 10 can clamp two sheet metal parts 17. Each clamp body 10 is provided with two side clamping cylinders 105, and each side clamping cylinder 105 is arranged beside a placement area 101. In this embodiment, the side clamping cylinders 105 are air cylinders, and each side clamping cylinder 105 is fixed to both ends of the length direction of the top plate 103 by a bent stainless steel sheet, and the side clamping cylinders 105 are located at the bottom of the top plate 103. A movable opening is provided on the top plate 103, and the side clamping block 1010 is connected to the output end of the side clamping cylinder 105 through the movable opening. When the side clamping cylinder 105 is actuated, the side clamping block 1010 can move in the movable opening, and the side clamping cylinder 105 extends, driving the side clamping block 1010 to move toward the sheet metal part 17 until the sheet metal part 17 is pushed and the sheet metal part 17 is pressed against the side baffle 107, thereby realizing lateral fixation of the sheet metal part 17. Each clamp body 10 has four front pressing cylinders 106, and two front pressing cylinders 106 are provided in front of each placement area 101. The front pressing cylinder 106 is an air cylinder, and a fixing plate 1011 is installed at the bottom of the top plate 103 by bolts. The four front pressing cylinders 106 are all installed on the fixing plate 1011 by bolts, and the front block rod 108 is provided on the side of the placement area 101 close to the front pressing cylinder 106. The top plate 103 is also provided with a plurality of through-holes for the front pressing blocks 109 to pass through. The front pressing block 109 is passed through the top plate 103 and connected with the output end of the front pressing cylinder 106. When the output end of the front pressing cylinder 106 retracts, the front pressing block 109 will abut against the sheet metal part 17, and then the sheet metal part 17 will be abutted against the front block rod 108, thereby fixing the front side of the sheet metal part 17.

[0036] In this embodiment, the clamp body 10 also includes a plurality of upper clamping cylinders 1012 for applying force to the sheet metal part 17 toward the placement area 101, and the upper clamping cylinders 1012 are arranged on the top plate 103; a pressure rod 1013 is provided on the top of the top plate 103, and one end of the pressure rod 1013 is provided with an upper pressure block 1014 for abutting against the sheet metal part 17, and the other end is connected to the output end of the upper clamping cylinder 1012, and the middle part of the pressure rod 1013 is hinged to the top plate 103; the upper pressure block 1014 is located above the placement area 101.

[0037] Specifically, each fixture body 10 is equipped with four upper clamping cylinders 1012, with two corresponding to each placement area 101. The upper clamping cylinders 1012 are pneumatic cylinders. Four mounting blocks 1016, corresponding one to each of the upper clamping cylinders 1012, are provided on the sidewalls of the top plate 103. The upper clamping cylinders 1012 are bolted to the mounting blocks 1016. The mounting blocks 1016 also have vertically extending support rods 1015. The middle portion of a pressure rod 1013 is hingedly connected to the support rods 1015. When the output end of the upper clamping cylinder 1012 extends, the end of the pressure rod 1013, equipped with an upper pressure block 1014, moves toward the top of the sheet metal part 17 until it contacts the sheet metal part 17, pressing the sheet metal part 17 firmly into the placement area 101. Through the cooperation of the side clamping cylinder 105 and the side stop rod 107, the cooperation of the front clamping cylinder 106 and the front stop rod 108, and the cooperation of the upper clamping cylinder 1012 and the pressure rod 1013, the sheet metal part 17 can be placed more firmly in the placement area 101, which is convenient for welding operations. At the same time, the output ends of the front clamping cylinder 106, the side clamping cylinder 105 and the upper clamping cylinder 1012 can also be kept away from the sheet metal part 17 at the same time, thereby improving the efficiency of the operator in loading and unloading operations.

[0038] Example 2 Reference Figure 4 , which is Example 2 of a sheet metal closed laser welding device of the present invention. The difference between this embodiment and Example 1 is that the clamping assembly 161 also includes a plurality of buffer limit members 1615 for blocking the movement of the clamp body 10. The buffer limit members 1615 are arranged on the connecting plate 1611 and are located at both ends of the travel direction of the slide rail 1612.

[0039] Specifically, the buffer limiter 1615 includes a limit block 16151, a limit rod 16152 and a buffer rod 16153. The limit block 16151 is welded to the connecting plate 1611 and is located at both ends of the stroke of the driving cylinder 1613. The limit rod 16152 is passed through the limit block 16151. The limit rod 16152 and the limit block 16151 are connected by threads, so as to achieve the effect of adjusting the extension length of the limit rod 16152. One end of the buffer rod 16153 is passed through the limit block 16151 by a threaded connection, and the other end is a silicone head. Adjust the extended length of the buffer rod 16153 and make the extended length of the buffer rod 16153 greater than the extended length of the limit rod 16152, so that when the clamp body 10 moves to the set end point of the stroke, it will first abut against the silicone head of the buffer rod 16153. As the silicone head is squeezed, the clamp body 10 will abut against the limit rod 16152, thereby completely preventing the clamp body 10 from continuing to move, achieving the effect of buffering and limiting. By limiting the sliding stroke of the clamp body 10 on the slide rail 1612, it is convenient for the operator to make adjustments according to actual conditions.

[0040] Example 3 This embodiment is a method for edge-sealing a sheet metal part 17 using a sheet metal sealed laser welding device in embodiment 2 of the present invention, comprising the following steps: S1. The clamping assembly 161 slides along the inlet and outlet shaft 162 to the loading and unloading area 111 under the drive of the inlet and outlet drive member 163, and the sheet metal part 17 to be welded is placed on the placement area 101; S2. The output end of the front clamping cylinder 106 retracts, pushing the sheet metal part 17 against the front stopper 108. The output end of the side clamping cylinder 105 extends, pushing the sheet metal part 17 against the side stopper 107. The output end of the upper clamping cylinder 1012 extends, driving the end of the pressure rod 1013 equipped with the upper pressure block 1014 to abut the top of the sheet metal part 17, pressing the sheet metal part 17 against the placement area 101, completing the fixation of the sheet metal part 17. S3. The in-and-out drive member 163 drives the clamping assembly 161 to slide along the in-and-out shaft 162 to the welding area 112. The drive cylinder 1613 drives the fixture body 10 to slide to the set position. The transverse drive mechanism 144 drives the longitudinal movable shaft 142 to move to the set position. The longitudinal drive mechanism 145 drives the lifting shaft 143 to move above the sheet metal part 17. The lifting drive mechanism drives the laser welding head 13 to a position close to the weld seam of the sheet metal part 17. S4 starts the laser welding head 13, the laser welding head 13 is driven by the lifting drive mechanism, the lateral drive mechanism 144 and the longitudinal drive mechanism 145, and moves in accordance with the weld trajectory of the sheet metal part 17 until the welding of the sheet metal part 17 is completed; S5. After welding is completed, the lifting drive mechanism drives the laser welding head 13 to lift, and the in-and-out drive member 163 drives the clamping assembly 161 to slide along the in-and-out shaft 162 to the loading and unloading area 111. The output ends of the front clamping cylinder 106 and the side clamping cylinder 105 are away from the sheet metal part 17, and the output end of the upper clamping cylinder 1012 is retracted. The pressure rod 1013 drives the upper pressure block 1014 away from the sheet metal part 17. At this time, the welded sheet metal part 17 can be removed from the fixture body 10.

[0041] When one group of clamping and moving mechanisms 16 is performing welding operations, the other group of clamping and moving mechanisms 16 is performing loading operations. In this way, when the current group of clamping and moving mechanisms 16 completes the welding operation and starts unloading, the latter group of clamping and moving mechanisms 16 can perform welding operations. The two groups of clamping and moving mechanisms 16 perform welding operations alternately to improve work efficiency.

[0042] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

[0043] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0044] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A sheet metal enclosed laser welding device, characterized in that: The invention comprises a laser welding device (1) for performing sheet metal edge banding welding, a laser source device (2) for providing a laser light source to the laser welding device (1), a dust removal device (4) for removing dust in the laser welding device (1), a control auxiliary device (3) for controlling the laser welding device (1), the laser source device (2), and the dust removal device (4), a power supply device (5) for distributing power to the laser welding device (1), the laser source device (2), the control auxiliary device (3), and the dust removal device (4), and a support platform (6); the laser source device (2), the control auxiliary device (3), the dust removal device (4), and the power supply device (5) are all arranged on the top of the support platform (6), and the laser welding device (1) is arranged at the bottom of the support platform (6); the laser source device (2), the laser welding device (1), and the dust removal device (4) are all electrically connected to the control auxiliary device (3).

2. The sheet metal enclosed laser welding equipment according to claim 1, characterized in that: The laser welding device (1) comprises a base (11), a protective cover (12), a laser welding head (13), a welding head moving mechanism (14) and a plurality of clamping moving mechanisms (16); the laser welding head (13) is arranged on the welding head moving mechanism (14), and the laser welding head (13) is connected to the welding head moving mechanism (14) by power; the welding head moving mechanism (14) and the clamping moving mechanism (16) are both arranged on the top of the base (11), and the laser welding head (13) is located above the clamping moving mechanism (16); the protective cover (12) is arranged on the top of the base (11), and the protective cover (12) is arranged above the laser welding head (13), the welding head moving mechanism (14) and the clamping moving mechanism (16).

3. The sheet metal enclosed laser welding equipment according to claim 2, characterized in that: The welding head moving mechanism (14) includes a transverse moving shaft (141), a longitudinal moving shaft (142) and a lifting shaft (143); the transverse moving shaft (141) is arranged on the top of the base (11); the longitudinal moving shaft (142) is slidably mounted on the transverse moving shaft (141), and the transverse moving shaft (141) is provided with a transverse driving mechanism (144) for driving the longitudinal moving shaft (142) to slide along the transverse moving shaft (141); the lifting shaft (143) is slidably mounted on the longitudinal moving shaft (142), and the longitudinal moving shaft (142) is provided with a longitudinal driving mechanism (145) for driving the lifting shaft (143) to slide along the longitudinal moving shaft (142); the laser welding head (13) is slidably mounted on the lifting shaft (143), and the lifting shaft (143) can drive the laser welding head (13) to slide up and down along the lifting shaft (143).

4. The sheet metal enclosed laser welding equipment according to claim 2, characterized in that: The clamping movement mechanism (16) includes a clamping assembly (161) for clamping sheet metal parts, an in-and-out shaft (162) and an in-and-out driving member (163); the in-and-out shaft (162) is arranged on the top of the base (11), and the clamping assembly (161) is slidably arranged on the in-and-out shaft (162); the in-and-out driving member (163) is arranged on the in-and-out shaft (162), and the in-and-out driving member (163) drives the clamping assembly (161) to slide along the in-and-out shaft (162).

5. The sheet metal enclosed laser welding equipment according to claim 4, characterized in that: The base (11) includes a loading and unloading area (111) and a welding area (112); one end of the inlet and outlet shaft (162) is located in the loading and unloading area (111), and the other end is located in the welding area (112); the welding head moving mechanism (14) is located in the welding area (112), and the protective cover (12) is located at the top of the welding area (112); a grating (15) is provided on the top of the base (11) in the loading and unloading area (111).

6. The sheet metal enclosed laser welding equipment according to claim 4, characterized in that: The clamping assembly (161) includes a connecting plate (1611), a clamp body (10) for firmly clamping the sheet metal parts, a plurality of slide rails (1612) and a drive cylinder (1613); the connecting plate (1611) is slidably arranged on the inlet and outlet shaft (162); the slide rail (1612) is arranged on the top of the connecting plate (1611), the clamp body (10) is slidably arranged on the slide rail (1612), the drive cylinder (1613) is arranged on the connecting plate (1611), and the drive cylinder (1613) is connected to the clamp body (10) by power, and the drive cylinder (1613) drives the clamp body (10) to slide along the slide rail (1612).

7. The sheet metal enclosed laser welding equipment according to claim 6, characterized in that: The clamp body (10) includes a bottom plate (102), a top plate (103), a plurality of connecting rods (104), a plurality of side clamping cylinders (105) and a plurality of front clamping cylinders (106); the bottom plate (102) is slidably arranged on a slide rail (1612), the connecting rod (104) is arranged on the top of the bottom plate (102), the top plate (103) is arranged on the top of the connecting plate (1611), and the upper surface of the top plate (103) is provided with a plurality of placement areas (101) for placing sheet metal parts; the top plate (103) is provided with a plurality of side positions in one direction close to the placement area (101). The dry side stopper (107) is provided with a plurality of front stoppers (108) at the side position in the other direction close to the placement area (101); the side pressing cylinder (105) is provided on the top plate (103), and the output end of the side pressing cylinder (105) faces the side stopper (107), and the output end of the side pressing cylinder (105) is provided with a side pressing block (1010); the front pressing cylinder (106) is provided on the top plate (103), and the output end of the front pressing cylinder (106) faces the front stopper (108), and the output end of the front pressing cylinder (106) is provided with a front pressing block (109).

8. The sheet metal enclosed laser welding equipment according to claim 6, characterized in that: The clamp body (10) further comprises a plurality of upper pressing cylinders (1012) for applying a force to the sheet metal parts toward the placement area (101), wherein the upper pressing cylinders (1012) are arranged on the top plate (103); a pressure rod (1013) is provided on the top of the top plate (103); one end of the pressure rod (1013) is provided with an upper pressure block (1014) for abutting against the sheet metal parts, and the other end is connected to the output end of the upper pressing cylinder (1012), and the middle part of the pressure rod (1013) is hinged to the top plate (103); the upper pressure block (1014) is located above the placement area (101).

9. The sheet metal enclosed laser welding equipment according to claim 6, characterized in that: The clamping assembly (161) further comprises a plurality of buffering limit members (1615) for preventing the movement of the clamp body (10); the buffering limit members (1615) are provided on the connecting plate (1611) and are located at both ends of the travel direction of the slide rail (1612).

10. A method for edge welding of sheet metal parts using the sheet metal closed laser welding equipment according to any one of claims 1 to 9, characterized in that: The steps include: S1. The clamping assembly (161) slides along the in-and-out shaft (162) to the loading and unloading area (111) under the drive of the in-and-out drive member (163), and places the sheet metal parts to be welded on the placement area (101); S2. The output end of the front clamping cylinder (106) pushes the sheet metal part against the front stopper (108), the output end of the side clamping cylinder (105) pushes the sheet metal part against the side stopper (107), and the output end of the upper clamping cylinder (1012) extends, driving the pressure rod (1013) provided with one end of the upper pressure block (1014) to abut against the top of the sheet metal part, pressing the sheet metal part onto the placement area (101), thereby completing the fixation of the sheet metal part; S3. The in-and-out drive member (163) drives the clamping assembly (161) to slide along the in-and-out shaft (162) to the welding area (112), the drive cylinder (1613) drives the clamp body (10) to slide to the set position, the transverse drive mechanism (144) drives the longitudinal moving shaft (142) to move to the set position, the longitudinal drive mechanism (145) drives the lifting shaft (143) to move above the sheet metal part, and the lifting drive mechanism drives the laser welding head (13) to move to a position close to the weld of the sheet metal part; S4. Starting the laser welding head (13), the laser welding head (13) is driven by the lifting drive mechanism, the transverse drive mechanism (144) and the longitudinal drive mechanism (145) to move along the weld trajectory of the sheet metal part until the welding of the sheet metal part is completed; S5. After welding is completed, the lifting drive mechanism drives the laser welding head (13) to lift, and the in-and-out drive member (163) drives the clamping assembly (161) to slide along the in-and-out shaft (162) to the loading and unloading area (111). The output ends of the front clamping cylinder (106) and the side clamping cylinder (105) are away from the sheet metal parts, and the output end of the upper clamping cylinder (1012) is retracted. The pressure rod (1013) drives the upper pressure block (1014) away from the sheet metal parts. At this time, the welded sheet metal parts can be removed from the fixture body (10).

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