A multi-head gantry welding machine

Abstract

The present invention relates to the field of welding technology, and discloses a multi-head gantry welding machine, comprising a frame, a first positioning mechanism and a second positioning mechanism; a tooling mechanism is provided on the frame, the tooling mechanism comprises a tooling plate slidably installed on the top of the frame, and the first positioning mechanism is installed on the tooling plate; a welding mechanism is also provided on the frame, and a conveying mechanism is provided on the front and rear sides of the welding mechanism; the first positioning mechanism is connected to the tooling plate, through which the lower corner plate of the product can be positioned, and then the frame and the bottom plate are placed on the tooling plate, and then the second positioning mechanism is installed on the bottom plate through the conveying mechanism to position the upper corner plate. After the various components of the product are in place, the tooling mechanism drives the product to pass through the welding mechanism along the X-axis direction for welding, ensuring that it can complete accurate and stable welding work.

Description

Technical Field

[0001] The present invention relates to the technical field of welding, in particular to a multi-head gantry welding machine. Background Art

[0002] In existing hydrogen production equipment, some parts need to be fixed together by welding; Figure 4 、 Figure 5 As shown, a bottom plate is fixedly installed on the inner side of the frame, and a plurality of L-shaped corner plates are arranged on the upper and lower sides of the bottom plate.

[0003] After the base plate and frame are fixed, the angle plates need to be accurately welded to the upper and lower sides of the base plate. Usually, the connection of such weldments is carried out by welding with a welding head, that is, the arc heat generated between the welding head and the workpiece is used to melt the metal, so that the connected parts form a strong metallurgical bond.

[0004] Since the angle plate has an L-shaped structure and the position accuracy of the angle plate is required to be high, the existing welding machine cannot ensure that it can complete the precise and stable welding work. Therefore, we propose a multi-head gantry welding machine to meet its welding needs. Summary of the Invention

[0005] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide a multi-head gantry welding machine. The lower corner plate of the product is positioned by a first positioning mechanism, and then the frame and bottom plate finished product are placed above the lower corner plate. The second positioning mechanism is then placed on the bottom plate to position the upper corner plate. Finally, the tooling mechanism drives the product through the welding mechanism for welding, thereby ensuring that it can complete accurate and stable welding work.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] A multi-head gantry welding machine comprises a frame, a first positioning mechanism for positioning the lower angle plate, and a second positioning mechanism for positioning the upper angle plate; the frame is provided with a tooling mechanism for receiving and positioning the product, the tooling mechanism comprises a tooling plate slidably mounted on the top of the frame, and the first positioning mechanism is mounted on the tooling plate; the frame is also provided with a welding mechanism, and the front and rear sides of the welding mechanism are provided with a conveying mechanism; the conveying mechanism is used to install the second positioning mechanism on or remove it from the bottom plate of the product, and the tooling mechanism can drive the product through the welding mechanism along the X-axis direction.

[0008] Optionally, the first positioning mechanism includes a positioning block fixedly mounted on the tooling plate, the positioning block adopts an L-shaped structure, a support block is provided on the inner side of the positioning block, a positioning bead is installed on the support block, and the end of the longitudinal edge of the lower corner plate is located between the positioning block and the positioning bead.

[0009] Optionally, the second positioning mechanism includes a comb plate, which has a plurality of equally spaced comb teeth arranged on one side of the comb plate close to the upper corner plate, the end of the upper corner plate is located between two adjacent comb teeth, and the comb plate is installed on the inner side of the frame of the product through a connecting component.

[0010] Optionally, the connecting assembly includes a support block fixedly mounted on the comb plate, a pull rod movably provided on the support block, a retaining ring installed at one end of the pull rod, and a pull hook that can be hooked with the frame at the other end, and a second spring is also sleeved on the pull rod, and the two ends of the second spring are in contact with the retaining ring and the support block respectively.

[0011] Optionally, a hook block is fixedly installed on the top surface of the combing plate, and the conveying mechanism includes two brackets arranged opposite to each other, the frame passes through the two brackets, and a beam that can move along the Y-axis direction is installed on the top of the two brackets, and a central connecting block is fixedly installed on the beam, and support plates that can be raised and lowered along the Z-axis are provided on both sides of the central connecting block, the support plates and the combing plate are parallel to the X-axis direction, and hook claws that can be hooked with the hook blocks are installed on the support plates.

[0012] Optionally, the tooling mechanism also includes an X-axial positioning plate and a Y-axial positioning plate fixedly mounted on the tooling plate, and the two are adjacently distributed on the outside of the frame; the tooling plate is provided with an X-axial side pushing component for pushing the frame against the X-axial positioning plate, and the tooling plate is also provided with a Y-axial side pushing component for pushing the frame against the Y-axial positioning plate.

[0013] Optionally, the bracket is provided with a lifting mechanism for lifting the tooling plate, and the bracket is also provided with a first unlocking component and a second unlocking component for unlocking the X-axial lateral thrust component and the Y-axial lateral thrust component respectively. After the lifting mechanism lifts the tooling plate, the X-axial lateral thrust component is connected to the first unlocking component, and the Y-axial lateral thrust component is connected to the second unlocking component.

[0014] Optionally, a second guide rail parallel to the X-axis direction is fixedly installed on the top of the frame, a roller is rotatably installed on the tooling plate, a V-shaped groove is opened on the circumferential surface of the roller, and the second guide rail is embedded in the V-shaped groove.

[0015] Optionally, a fixed block is installed on the side of the tooling plate, and a driving component for driving the tooling plate to move along the second guide rail is provided on the side of the frame, and the driving component and the fixed block are connected by a pin assembly.

[0016] Optionally, the welding mechanism includes a gantry, the frame passes through the gantry, and the front side of the gantry is provided with a first mounting plate and a second mounting plate that can move along the Y-axis direction; the first mounting plate and the second mounting plate are respectively provided with a plurality of upper welding heads and lower welding heads that can be raised and lowered, and the number and position of the upper welding heads correspond to those of the lower welding heads.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] (1) In the present invention, the first positioning mechanism is connected to the tooling plate, through which the lower corner plate of the product can be positioned. Then, the frame and the bottom plate are placed on the tooling plate, and the second positioning mechanism is installed on the bottom plate through the transport mechanism to position the upper corner plate. After the various components of the product are in place, the tooling mechanism drives the product along the X-axis direction through the welding mechanism for welding, ensuring that it can complete accurate and stable welding work. By positioning the various components of the product separately, the equipment can not only improve the welding accuracy of the upper and lower corner plates, but also greatly improve the welding work efficiency;

[0019] (2) With respect to the first positioning mechanism, the lower corner plate is positioned by a clamping method, and the positioning beads are used to fix the lower corner plate, which not only eliminates the gap between the positioning block and the support block, but also facilitates the disassembly and assembly between the lower corner plate and the first positioning mechanism;

[0020] (3) With respect to the second positioning mechanism, the spacing between two adjacent comb teeth corresponds to the width of the upper corner plate, and the end of the upper corner plate is embedded between the two to complete the positioning; and the comb plate can be connected to the frame through the connecting component, thereby preventing the position of the upper corner plate from shifting during transportation;

[0021] (4) In the present invention, the positioning of the frame in the X-axis direction can be completed by pushing the frame against the X-axis positioning plate through the X-axis side push assembly, and the positioning of the frame in the Y-axis direction can be completed by pushing the frame against the Y-axis positioning plate through the Y-axis side push assembly, thereby ensuring the position accuracy of the entire product on the tooling plate;

[0022] (5) In the present invention, the first mounting plate and the second mounting plate can both move along the Y-axis direction, driving the corresponding welding heads to move horizontally, thereby completing welding at multiple welding points with a smaller number of welding heads; the upper and lower welding heads can also open and close relative to each other in the longitudinal direction, which can be applicable to welding of different thicknesses, greatly improving the scope of application of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural diagram of a multi-head gantry welding machine in the embodiment of the present invention;

[0024] Figure 2 is a structural schematic diagram of a support mechanism in an embodiment of the present invention;

[0025] Figure 3 It is a structural schematic diagram of the tooling mechanism in an embodiment of the present invention;

[0026] Figure 4 It is a structural diagram of a product in an embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of the position structure of the upper and lower corner plates and the bottom plate in an embodiment of the present invention;

[0028] Figure 6 is a schematic structural diagram of the first and second positioning mechanisms in an embodiment of the present invention;

[0029] Figure 7 2 is a schematic structural diagram of an X-axis thrust assembly according to an embodiment of the present invention;

[0030] Figure 8 2 is a schematic structural diagram of a Y-axis thrust assembly according to an embodiment of the present invention;

[0031] Figure 9 2 is a structural diagram of a welding mechanism according to an embodiment of the present invention;

[0032] Figure 10 is a side view of a welding mechanism in an embodiment of the present invention;

[0033] Figure 11 This is a schematic structural diagram of a transport mechanism according to an embodiment of the present invention;

[0034] Figure 12 This is a structural diagram of the support plate and the central connecting block in an embodiment of the present invention;

[0035] Figure 13 Schematic diagram of the position structure of the second rack and the second gear in an embodiment of the present invention;

[0036] Figure 14 is a structural schematic diagram of a lifting mechanism in an embodiment of the present invention;

[0037] Among them, 1, support mechanism; 101, frame; 102, first guide rail; 103, first rack; 104, slide; 105, latch assembly; 106, second guide rail;

[0038] 2. Welding mechanism; 201. Gantry; 202. First mounting plate; 203. Second mounting plate; 204. First telescopic assembly; 205. Upper welding head; 206. Lower welding head; 207. Support rod; 208. Pressing assembly;

[0039] 3. Transport mechanism; 301. Bracket; 302. Crossbeam; 303. Central connecting block; 304. Support plate; 305. Hook; 306. Third guide rail; 307. Second rack; 308. Rotating shaft; 309. Second gear;

[0040] 4. Product; 401. Frame; 402. Bottom plate; 403. Lower corner plate; 404. Upper corner plate;

[0041] 5. Tooling mechanism; 501. Tooling plate; 502. X-axis positioning plate;

[0042] 503, X-axis thrust assembly; 531, base plate; 532, base block; 533, top plate; 534, push rod; 545, first spring; 504, Y-axis positioning plate; 505, Y-axis thrust assembly;

[0043] 506, roller; 507, bump; 508, fixing block;

[0044] 6. First positioning mechanism; 601. Positioning block; 602. Support block;

[0045] 7. Second positioning mechanism; 701. Comb plate; 702. Comb teeth; 703. Hook block; 704. Support block; 705. Guide block; 706. Pull rod; 707. Draw hook; 708. Stop ring; 709. Second spring;

[0046] 801, third telescopic assembly; 802, connecting block; 803, pull plate; 804, supporting block;

[0047] 901, first unlocking component; 902, second unlocking component. DETAILED DESCRIPTION

[0048] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams that only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0049] The welding machine proposed by the present invention is mainly targeted at products 4 with structures such as Figure 4 and Figure 5 As shown, product 4 includes a frame 401, a base plate 402, a lower corner plate 403 and an upper corner plate 404, wherein the frame 401 and the base plate 402 are fixed together before welding, so they are a whole; the lower corner plate 403 and the upper corner plate 404 are both provided with multiple strips, both of which are L-shaped structures and are located on the inner side of the frame 401, the former is fixed to the bottom of the base plate 402, and the latter is fixed to the top of the base plate 402; the function of the special welding machine is to weld the lower corner plate 403 and the upper corner plate 404 to the corresponding positions on both sides of the base plate 402.

[0050] Among them, the lower corner plate 403 and the upper corner plate 404 are both parallel to the Y-axis direction and are distributed at a certain interval along the X-axis direction; the outermost lower corner plate 403 and the upper corner plate 404 overlap, and the welding thickness is three layers, and the remaining lower corner plates 403 and upper corner plates 404 are staggered, so the welding thickness is two layers.

[0051] like Figure 1 、 Figure 3 and Figure 6 As shown, a multi-head gantry welding machine includes a supporting mechanism 1, a welding mechanism 2, a conveying mechanism 3, a tooling mechanism 5, a first positioning mechanism 6 and a second positioning mechanism 7; the welding mechanism 2 is located in the middle position of the supporting mechanism 1, the tooling mechanism 5 is installed on the supporting mechanism 1, and the first positioning mechanism 6 is installed on the tooling mechanism 5; there are two conveying mechanisms 3, which are distributed on the front and back sides of the welding mechanism 2. Before welding, the second positioning mechanism 7 is installed on the bottom plate 402 of the product 4 through the conveying mechanism 3 located on the front side. After welding is completed, the second positioning mechanism 7 can be removed from the bottom plate 402 through the conveying mechanism 3 located on the rear side to facilitate unloading of the product 4.

[0052] Among them, the welding mechanism 2 adopts the form of gantry multi-head welding, which is used to firmly weld the upper corner plate 404 and the lower corner plate 403 to the base plate 402; the tooling mechanism 5 is used to receive and position the product 4, the support mechanism 1 is used to support the tooling mechanism 5 and drive it to pass through the welding mechanism 2 along the X-axis direction, the first positioning mechanism 6 is used to position the lower corner plate 403, the second positioning mechanism 7 is used to position the upper corner plate 404, and the conveying mechanism 3 is used to install the second positioning mechanism 7 on the base plate 402 of the product 4 or remove it from the base plate 402.

[0053] like Figure 1 、 Figure 9 and Figure 10 As shown, the welding mechanism 2 includes a gantry 201, with a first mounting plate 202 and a second mounting plate 203 disposed on the front side thereof, movable along the Y-axis. Multiple upper welding heads 205 and lower welding heads 206 are disposed on the first mounting plate 202 and the second mounting plate 203, respectively, and are movable. The number and position of the upper welding heads 205 correspond to those of the lower welding heads 206. The first mounting plate 202 is positioned above the second mounting plate 203. The upper welding heads 205 are used to weld the upper gusset plate 404 to the top of the base plate 402, while the lower welding heads 206 are used to weld the lower gusset plate 403 to the bottom of the base plate 402.

[0054] A gear rack drive structure is arranged between the first mounting plate 202 and the front side of the gantry 201. The motor here is mounted on the first mounting plate 202, the gear is mounted on the output end of the motor, the rack is fixedly mounted on the front side of the gantry 201 and is parallel to the Y-axis direction, and a slide rail fixedly connected to the gantry 201 is also provided on one side of the rack, and the first mounting plate 202 is slidably connected to the slide rail.

[0055] Since the gear and the rack are meshed with each other, when the motor drives the gear to rotate, the gear will be moved along the length direction of the rack by the reverse action of the rack, thereby driving the first mounting plate 202 to move along the Y-axis direction.

[0056] A screw transmission structure is arranged between the second mounting plate 203 and the front side of the gantry 201. The screw is rotatably installed on the gantry 201 parallel to the Y-axis direction. A nut is screwed on the screw, and the nut is fixedly connected to the back side of the second mounting plate 203; slide rails fixedly connected to the gantry 201 are also arranged on both sides of the screw, and the second mounting plate 203 is slidably connected to the slide rails.

[0057] The nut is sleeved on the screw rod and fixedly connected to the second mounting plate 203. Restricted by the slide rail, the screw rod is driven to rotate by the motor, and then drives the second mounting plate 203 to translate along its axial direction through the nut, and finally realizes the movement of the first mounting plate 202 along the Y-axis direction.

[0058] When product 4 has a large number of welding points in the Y-axis direction, increasing the corresponding number of welding heads will also increase the cost of the equipment and the complexity of the electrical circuit arrangement. Therefore, by moving the first mounting plate 202 and the second mounting plate 203 along the Y-axis direction, the same welding head can be used for welding at different welding point positions in the Y-axis direction, which greatly improves maneuverability and reduces costs.

[0059] Furthermore, a plurality of first telescopic components 204 parallel to the Z-axis direction are fixedly mounted on the first mounting plate 202, and the plurality of first telescopic components 204 are arranged in a line, and an upper welding head 205 is installed at the output end of each first telescopic component 204, and the upper welding head 205 faces downward; second telescopic components corresponding to the number and position of the first telescopic components 204 are fixedly mounted on the second mounting plate 203, and a lower welding head 206 is installed at the output end of each second telescopic component, and the lower welding head 206 faces upward.

[0060] The first telescopic component 204 adopts a double-force cylinder, and the second telescopic component adopts an electric cylinder; since the welding thickness at both ends of the product 4 is different from the welding thickness in the middle, the welding distance between the upper welding head 205 and the lower welding head 206 can be adjusted through the first telescopic component 204 and the second telescopic component, thereby meeting the welding requirements of different thicknesses and expanding the scope of application of the equipment.

[0061] In addition, inwardly inclined support rods 207 are fixedly installed on both sides of the gantry 201, and a pressure assembly 208 is installed at the end of the support rod 207; the welding method of the present invention can adopt arc welding, and the welding head needs to be polished and cleaned after long-term use, but cleaning the welding head will cause height wear, which in turn affects the extension position of the welding head and ultimately affects the welding quality.

[0062] After polishing the welding head, the tooling mechanism 5 can be lifted so that it contacts the pressing component 208; then the electric cylinder can be switched to torque mode and extended to ensure that all the lower welding heads 206 can contact the product 4, and then the position where the lower welding head 206 contacts the product 4 is used as the origin to recalibrate the coordinates, which can avoid the above-mentioned problems and ensure that the welding head can contact the corresponding angle plate of the product 4 during each welding.

[0063] like Figure 3 、 Figure 7 and Figure 8 As shown, the tooling mechanism 5 includes a tooling plate 501, which is slidably installed on the top of the support mechanism 1, and the tooling plate 501 is also provided with an X-axial positioning plate 502, an X-axial side thrust assembly 503, a Y-axial positioning plate 504 and a Y-axial side thrust assembly 505.

[0064] Among them, the first positioning mechanism 6 is fixedly installed on the tooling plate 501. After the lower corner plate 403 is fixedly placed on the tooling plate 501 according to the first positioning mechanism 6, the integrated frame 401 and bottom plate 402 can be placed above the lower corner plate 403 through the existing multi-axis robot; when the frame 401 and bottom plate 402 are placed, they must be positioned in the X and Y axis directions to ensure that the positions of the lower corner plate 403 and the bottom plate 402 correspond one to one.

[0065] As mentioned above, the X-axis positioning plate 502 and the X-axis side thrust assembly 503 are relatively distributed on the tooling plate 501 along the X-axis direction, and the Y-axis positioning plate 504 and the Y-axis side thrust assembly 505 are relatively distributed on the tooling plate 501 along the Y-axis direction; the X-axis positioning plate 502 and the Y-axis positioning plate 504 are both fixed on the tooling plate 501, and the two are adjacently distributed on the outside of the frame 401 and there are at least two of them to ensure the accuracy of the positioning of the frame 401.

[0066] Specifically, the X-axis side push assembly 503 can push the frame 401 against the X-axis positioning plate 502, and the Y-axis side push assembly 505 can push the frame 401 against the Y-axis positioning plate 504. Based on the positioning of the X-axis positioning plate 502 and the Y-axis positioning plate 504, it can not only ensure the position accuracy between the lower corner plate 403 and the bottom plate 402, but also facilitate subsequent operations of other mechanisms on the tooling plate 501.

[0067] Furthermore, the X-axis lateral thrust assembly 503 includes a base plate 531 fixedly mounted on the tooling plate 501, a base block 532 fixedly mounted on the end of the base plate 531 away from the frame 401, a push rod 534 parallel to the X-axis direction is passed through the base block 532, and the end of the push rod 534 close to the frame 401 is connected to the top plate 533, and the top plate 533 is slidingly connected to the base plate 531; a first spring 545 is also sleeved on the push rod 534, and the two ends of the first spring 545 respectively abut against the base block 532 and the top plate 533.

[0068] Before placing the frame 401 on the tooling plate 501, the X-axis lateral pushing assembly 503 and the Y-axis lateral pushing assembly 505 need to be adjusted to the unlocked state; taking the X-axis lateral pushing assembly 503 as an example, when unlocking, the push rod 534 is pulled outward along the axial direction to drive the top plate 533 to move outward. At this time, the distance between the top plate 533 and the X-axis positioning plate 502 is not less than the length of the frame 401, and the first spring 545 is further compressed. After placing the frame 401, the push rod 534 is released, and the first spring 545 drives the top plate 533 to move forward and contact the frame 401, and pushes the frame 401 to move along the X-axis direction until it is abutted against the X-axis positioning plate 502, completing the positioning of the X-axis frame 401 in the X-axis direction; in order to ensure the abutting force, the first spring 545 is always in a compressed state.

[0069] The structure and working principle of the Y-axis lateral thrust component 505 and the X-axis lateral thrust component 503 are the same, so they will not be repeated here; in order to ensure that after positioning is completed in the X-axis direction, the frame 401 can also be adjusted along the Y-axis direction, guide wheels are rotatably installed at the ends of the top plate 533 and the X-axis positioning plate 502, and the axis of the guide wheel is parallel to the Z-axis, that is, both sides of the length direction of the frame 401 are in contact with the guide wheel. Under the action of the guide wheel, the frame 401 can also move along the Y-axis direction until it is attached to the Y-axis positioning plate 504.

[0070] like Figure 1 、 Figure 3 and Figure 6 As shown, the first positioning mechanism 6 includes a positioning block 601 fixedly mounted on the tooling plate 501 . The positioning block 601 adopts an L-shaped structure. A supporting block 602 is provided on the inner side of the positioning block 601 , and a positioning bead is installed on the supporting block 602 .

[0071] Among them, the positioning bead usually refers to a small load device composed of a shell, a spring, a ball or a cylinder, also called a ball plunger or a spring plunger. When a certain pressure is applied to the ball, the ball will overcome the elastic force of the spring and shrink into the shell; when the pressure disappears, the elastic force of the spring will push the ball back to its original position, thereby realizing functions such as positioning or fixing.

[0072] There are multiple first positioning mechanisms 6, which are divided into two groups and symmetrically distributed on the tooling plate 501; when the lower corner plate 403 is placed, the end of the longitudinal edge is located between the positioning block 601 and the positioning bead, the transverse top edge is against the top of the support block 602, and the end of the lower corner plate 403 is against the inner side surface of the L-shaped positioning block 601 parallel to the X-axis direction; based on this, through the two relative first positioning mechanisms 6, the positioning of a lower corner plate 403 in the three directions of X, Y, and Z axes can be completed to ensure its accurate position.

[0073] The second positioning mechanism 7 includes a comb plate 701, and a plurality of equally spaced comb teeth 702 are provided on one side of the comb plate 701 close to the upper corner plate 404, and the distance between two adjacent comb teeth 702 is the same as the width of the bottom edge of the upper corner plate 404; there are two second positioning mechanisms 7, which are symmetrically distributed on the bottom plate 402, and the comb plates 701 are parallel to the X-axis direction; when the upper corner plate 404 is placed, its bottom edge contacts the bottom plate 402, and its two ends are respectively located between the corresponding two adjacent comb teeth 702, and the ends contact the comb plate 701, so that the upper corner plate 404 can be completely positioned.

[0074] In order to achieve the positioning of the comb plate 701 in the X-axis direction and ensure that its position on the base plate 402 will not be offset, the comb plate 701 is installed on the inner side of the frame 401 of the product 4 through a connecting component, that is, one end of the comb plate 701 is connected to the frame 401 through a connecting component.

[0075] As mentioned above, the connecting assembly includes a support block 704 fixedly mounted on the comb plate 701, a pull rod 706 movably provided on the support block 704, a retaining ring 708 is installed at one end of the pull rod 706, and a pull hook 707 capable of being hooked with the frame 401 is connected to the other end, and a second spring 709 is also sleeved on the pull rod 706, and the two ends of the second spring 709 are in contact with the retaining ring 708 and the support block 704 respectively.

[0076] Among them, the second spring 709 is always in a compressed state. When the second positioning mechanism 7 is installed, the comb plate 701 is first moved downward along the Z-axis direction, so that the inner side surface of the hook 707 contacts the outer side surface of the frame 401, and then moves along the X-axis direction. At this time, the hook 707 is stationary, and the pull rod 706 moves axially relative to the support block 704, further compressing the second spring 709. At this time, the distance between the inner side surface of the hook 707 and the closest end of the comb plate 701 is not less than the wall thickness of the frame 401, and then the comb plate 701 is moved downward along the Z-axis direction until it contacts the bottom plate 402. After the comb plate 701 is released, the pull rod 706 pulls the hook 707 to be firmly hooked on the frame 401 under the action of the second spring 709, thereby realizing the positioning of the comb plate 701 in the X-axis direction.

[0077] Furthermore, a guide block 705 fixedly connected to the comb plate 701 is provided between the support block 704 and the hook 707. A guide rod is movably provided on the guide block 705. One end of the guide rod is connected to the hook 707, and the other end is connected to the pull rod 706. The action of the guide block 705 and the guide rod can improve the accuracy of the movement of the hook 707 along the X-axis direction.

[0078] In addition, in order to achieve positioning of the combing plate 701 in the Y-axis and Z-axis directions, the cross section of the combing plate 701 adopts an inverted L-shaped structure, and one side of the combing plate 701 is abutted against the frame 401.

[0079] like Figure 1 、 Figure 6 、 Figure 11 、 Figure 12 、 Figure 13 and Figure 14 As shown, the second positioning mechanism 7 can be installed or removed on the bottom plate 402 through the transport mechanism 3 , and a hook block 703 is fixedly installed on the top surface of the combing plate 701 .

[0080] The transport mechanism 3 includes two brackets 301 arranged opposite to each other, and a crossbeam 302 that can move along the Y-axis direction is installed on the top of the two brackets 301. A central connecting block 303 is fixedly installed on the crossbeam 302. Both sides of the central connecting block 303 are provided with support plates 304 that can be raised and lowered along the Z-axis. The support plates 304 and the combing plates 701 are parallel to the X-axis direction, and the support plates 304 are provided with hook claws 305 that can be hooked with the hook block 703.

[0081] Specifically, the support plate 304 can drive the claw 305 to move along the Y-axis and the Z-axis. After the claw 305 moves down along the Z-axis, it moves along the Y-axis to hook the claw 305 with the hook block 703, and then moves up along the Z-axis to remove the second positioning mechanism 7 from the base plate 402, making it easier for the robot to unload materials. At the same time, moving along the Y-axis can also allow the claws 305 on the two support plates 304 to operate on the two second positioning mechanisms 7 respectively.

[0082] The frame 401 and the base plate 402 are loaded and unloaded by a robot. In order to facilitate its work, a certain working space must be reserved. Therefore, two sets of hooks 305 for disassembling and assembling the two second positioning mechanisms 7 are provided, which are arranged on the same group of connecting blocks 303. By adjusting the position along the Y-axis direction, the two second positioning mechanisms 7 can be disassembled and assembled without affecting the loading and unloading actions of the robot.

[0083] There are two sets of hook claws 305, which are respectively installed on two support plates 304. Each set of hook claws 305 is provided with multiple hook claws 305, which are distributed along the length direction of the support plate 304, so as to prevent the comb plate 701 from being twisted and deformed after being taken; the hook claw 305 located in the middle position can also move along the X-axis direction to drive the comb plate 701 to move along the X-axis direction, so as to facilitate the hooking of the connecting component's hook 707 with the frame 401.

[0084] Among them, the hook claw 305 located in the middle position is slidably installed on the support plate 304 along the X-axis direction and is directly driven by the cylinder; the support plate 304 is slidably installed on the middle connecting block 303 along the Z-axis direction, and is also directly driven by the cylinder to achieve lifting; the two ends of the beam 302 are respectively slidably installed on the top of the two brackets 301 along the Y-axis direction, and are driven by a gear rack structure.

[0085] The bottom of the beam 302 is fixedly connected to a side plate, on which a rotating shaft 308 is passed, and a second gear 309 is installed at the end of the rotating shaft 308; a third guide rail 306 is fixedly installed on the top of the bracket 301, and the third guide rail 306 is slidably connected to the beam 302, and a second rack 307 is fixedly installed on the side of the bracket 301, and the second rack 307 is engaged with the second gear 309, and the second rack 307 and the third guide rail 306 are parallel to the Y-axis direction.

[0086] In order to avoid jamming caused by the asynchronous movement of the two ends of the beam 302, the gear rack structures at both ends of the beam 302 are driven by the same shaft 308. The shaft 308 is located below the beam 302 and passes through the middle connecting block 303. The shaft 308 is driven by a motor.

[0087] A lifting mechanism for lifting the tooling plate 501 is provided on the bracket 301, and the lifting mechanism includes a third telescopic component 801 fixedly mounted on the bracket 301, and the output end of the third telescopic component 801 is connected to a connecting block 802, and a pull plate 803 is fixedly mounted on the back side of the connecting block 802, and the pull plate 803 is slidably mounted on the bracket 301 along the Z-axis direction; the pull plate 803 is located below the third telescopic component 801, and a support block 804 is fixedly mounted on the pull plate 803.

[0088] Each bracket 301 is provided with two lifting mechanisms, and four protrusions 507 corresponding to the support blocks 804 of the lifting mechanisms are fixedly installed on the peripheral side of the tooling plate 501; the third telescopic component 801 adopts a cylinder. When the third telescopic component 801 is contracted, the support blocks 804 move upward along the Z axis and can lift the tooling plate 501 through the protrusions 507.

[0089] Since the tooling mechanism 5 is a moving part, in order to reduce the difficulty of its circuit design, the X-axial side thrust assembly 503 and the Y-axial side thrust assembly 505 on the tooling plate 501 are both self-locking mechanical structures. Therefore, they need to be unlocked first when disassembling and assembling the product 4, and the tooling plate 501 needs to be lifted to a certain height before unlocking.

[0090] The bracket 301 is also provided with a first unlocking component 901 and a second unlocking component 902 for unlocking the X-axis lateral thrust component 503 and the Y-axis lateral thrust component 505 respectively. After the tooling plate 501 is lifted to a certain height by the lifting mechanism, the X-axis lateral thrust component 503 is connected to the first unlocking component 901, and the Y-axis lateral thrust component 505 is connected to the second unlocking component 902.

[0091] The first unlocking assembly 901 and the second unlocking assembly 902 have the same structure, both including a telescopic cylinder connected to the bracket 301, and the output end of the telescopic cylinder is connected to a locking block, which is provided with a locking hole into which the end of the push rod 534 can be embedded; the end of the push rod 534 has a lock core, and as the tooling plate 501 moves upward, the lock core is embedded in the lock hole from bottom to top, and when the telescopic cylinder contracts, it can drive the push rod 534 to move axially through the locking block.

[0092] like Figure 1 、 Figure 2 and Figure 3 As shown, the support mechanism 1 includes a frame 101, which passes through the gantry 201 and two brackets 301, and the tooling plate 501 is slidably installed on the top of the frame 101; a second guide rail 106 parallel to the X-axis direction is fixedly installed on the top of the frame 101, and a roller 506 is rotatably installed on the tooling plate 501, and a V-shaped groove is opened on the circumferential surface of the roller 506, and the second guide rail 106 is embedded in the V-shaped groove.

[0093] The outer working surface of the second guide rail 106 is a circular surface, and the tooling plate 501 is overlapped on the second guide rail 106 through the roller 506. Based on its structural characteristics, it is convenient to lift and install the tooling plate 501; in order to ensure that the tooling plate 501 can slide stably, two second guide rails 106 are provided, and at least four rollers 506 are provided, all of which are symmetrically distributed.

[0094] Furthermore, a driving assembly for driving the tooling plate 501 to move along the second guide rail 106 is provided on the side of the frame 101 , a fixing block 508 is installed on the side of the tooling plate 501 , and the driving assembly and the fixing block 508 are connected via a latch assembly 105 .

[0095] The driving assembly includes a first rack 103 and first guide rails 102 arranged on the upper and lower sides of the first rack 103, both of which are parallel to the X-axis direction and fixedly connected to the frame 101; a slide 104 is slidably installed on the first guide rail 102, and a first gear is rotatably installed on the inner side of the slide 104. The first gear is driven by a motor installed on the slide 104, and the first gear is engaged with the first rack 103; based on this, when the motor drives the first gear to rotate, it is subjected to the reaction of the first rack 103, causing the first gear to move along the length direction of the first rack 103, thereby driving the slide 104 to move along the first guide rail 102.

[0096] The latch assembly 105 includes a cylinder parallel to the Z-axis direction, which is installed on the slide 104, and the output end of the cylinder is connected to a plug. A socket is provided on the fixed block 508. When the cylinder is extended, the plug is inserted into the socket from bottom to top along the Z-axis direction, so that the tooling plate 501 is connected to the slide 104, and the tooling plate 501 can be driven to move along the X-axis direction through the slide 104.

[0097] The use of the latch assembly 105 can timely realize the connection and separation of the tooling plate 501 and the slide plate 104, and will not affect the lifting mechanism to lift the tooling plate 501.

[0098] Working principle:

[0099] In the initial state, the tooling plate 501 is located below the transport mechanism 3 in front of the welding mechanism 2, i.e., at the loading station;

[0100] Step S1: Based on the positioning of the first positioning mechanism 6, the lower corner plate 403 is placed on the tooling plate 501;

[0101] Step S2: The tooling plate 501 carrying the lower corner plate 403 is lifted to a specified position along the Z-axis direction by the lifting mechanism, so that the X-axis side thrust assembly 503 is connected to the first unlocking assembly 901, and the Y-axis side thrust assembly 505 is connected to the second unlocking assembly 902, and the X-axis side thrust assembly 503 and the Y-axis side thrust assembly 505 are unlocked;

[0102] Step S3: Use a robot to move the frame 401 and the bottom plate 402 onto the tooling plate 501 so that the bottom plate 402 fits the lower corner plate 403;

[0103] Step S4: First, release the first unlocking component 901, so that the X-axis lateral pushing component 503 pushes the frame 401 to complete the positioning in the X-axis direction, and then release the second unlocking component 902, so that the Y-axis lateral pushing component 505 pushes the frame 401 to complete the positioning in the Y-axis direction;

[0104] Step S5: After the frame 401 is positioned, the lifting mechanism is reset to place the tooling plate 501 on top of the frame 101, and the tooling plate 501 and the slide plate 104 are connected together through the latch assembly 105 and the fixing block 508;

[0105] Step S6: The two second positioning mechanisms 7 are installed on the top of the bottom plate 402 by the transport mechanism 3 and the positioning is completed;

[0106] Step S7: Based on the positioning of the second positioning mechanism 7, the upper corner plate 404 is placed on the top of the bottom plate 402;

[0107] Step S8: The driving assembly drives the tooling plate 501 to move along the X-axis direction via the slide plate 104, and successively passes between the upper welding head 205 and the lower welding head 206 of the welding mechanism 2 for welding;

[0108] Step S9: After welding is completed, the tooling plate 501 is moved to the unloading station, and the two second positioning mechanisms 7 are removed from the bottom plate 402 by the transport mechanism 3 located at the rear side of the welding mechanism 2, and the tooling plate 501 and the slide plate 104 are separated;

[0109] Step S10: Lift the tooling plate 501 carrying the product 4 to a designated position along the Z-axis direction by the lifting mechanism, and unlock the X-axis side thrust assembly 503 and the Y-axis side thrust assembly 505 by the first unlocking assembly 901 and the second unlocking assembly 902 respectively;

[0110] Step S11: After unlocking, the robot removes the product 4 from the tooling plate 501 to complete the unloading;

[0111] Step S12: The lifting mechanism is reset to place the tooling plate 501 on the top of the frame 101 again, so that the tooling plate 501 and the slide 104 are connected together, and the driving assembly drives the tooling plate 501 to return to the loading station along the X-axis direction.

[0112] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0113] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0114] The above description is based on the ideal embodiment of the present invention. Based on the above description, relevant personnel can make various changes and modifications without departing from the technical scope of this invention. The technical scope of this invention is not limited to the content of the specification and must be determined according to the scope of the claims.

Claims

1. A multi-head gantry welding machine, characterized by: It comprises a frame (101), a first positioning mechanism (6) for positioning the lower corner plate (403), and a second positioning mechanism (7) for positioning the upper corner plate (404); The frame (101) is provided with a tooling mechanism (5) for receiving and positioning the product (4), the tooling mechanism (5) comprising a tooling plate (501) slidably mounted on the top of the frame (101), and the first positioning mechanism (6) is mounted on the tooling plate (501); The frame (101) is further provided with a welding mechanism (2), and a transport mechanism (3) is provided on both the front and rear sides of the welding mechanism (2); the transport mechanism (3) is used to install the second positioning mechanism (7) on the bottom plate (402) of the product (4) or remove it from the bottom plate (402), and the tooling mechanism (5) can drive the product (4) to pass through the welding mechanism (2) along the X-axis direction; The first positioning mechanism (6) comprises a positioning block (601) fixedly mounted on the tooling plate (501), the positioning block (601) adopts an L-shaped structure, a support block (602) is provided on the inner side of the positioning block (601), a positioning bead is mounted on the support block (602), and the end of the longitudinal side of the lower corner plate (403) is located between the positioning block (601) and the positioning bead; The second positioning mechanism (7) comprises a comb plate (701), a plurality of comb teeth (702) distributed at equal intervals are provided on a side of the comb plate (701) close to the upper corner plate (404), the end of the upper corner plate (404) is located between two adjacent comb teeth (702), and the comb plate (701) is installed on the inner side of the frame (401) of the product (4) through a connecting component; The welding mechanism (2) comprises a gantry (201), the frame (101) passes through the gantry (201), inwardly inclined support rods (207) are installed on both sides of the gantry (201), and a pressing assembly (208) is installed at the end of the support rod (207); The connecting assembly includes a support block (704) fixedly mounted on the comb plate (701), a pull rod (706) movably provided on the support block (704), a retaining ring (708) installed at one end of the pull rod (706), and a pull hook (707) capable of being hooked to the frame (401) connected at the other end, and a second spring (709) is also sleeved on the pull rod (706), and the two ends of the second spring (709) are in contact with the retaining ring (708) and the support block (704) respectively; A hook block (703) is fixedly mounted on the top surface of the combing plate (701), the transport mechanism (3) comprises two brackets (301) arranged opposite to each other, the frame (101) passes through the two brackets (301), and a crossbeam (302) capable of moving along the Y-axis direction is mounted on the top of the two brackets (301), a central connecting block (303) is fixedly mounted on the crossbeam (302), and support plates (304) capable of rising and falling along the Z-axis are mounted on both sides of the central connecting block (303), the support plates (304) and the combing plate (701) are parallel to the X-axis direction, and hook claws (305) capable of hooking with the hook blocks (703) are mounted on the support plates (304).

2. The multi-head gantry welding machine according to claim 1, characterized in that: The tooling mechanism (5) further comprises an X-axis positioning plate (502) and a Y-axis positioning plate (504) fixedly mounted on the tooling plate (501), the two being adjacently distributed on the outer side of the frame (401); an X-axis side pushing component (503) for pushing the frame (401) against the X-axis positioning plate (502) is provided on the tooling plate (501); and a Y-axis side pushing component (505) for pushing the frame (401) against the Y-axis positioning plate (504) is also provided on the tooling plate (501).

3. The multi-head gantry welding machine according to claim 2, characterized in that: The bracket (301) is provided with a lifting mechanism for lifting the tooling plate (501), and the bracket (301) is also provided with a first unlocking component (901) and a second unlocking component (902) for respectively unlocking the X-axis lateral thrust component (503) and the Y-axis lateral thrust component (505), and after the lifting mechanism lifts the tooling plate (501), the X-axis lateral thrust component (503) is connected to the first unlocking component (901), and the Y-axis lateral thrust component (505) is connected to the second unlocking component (902).

4. The multi-head gantry welding machine according to claim 3, characterized in that: A second guide rail (106) parallel to the X-axis direction is fixedly installed on the top of the frame (101), a roller (506) is rotatably installed on the tooling plate (501), a V-shaped groove is provided on the circumferential surface of the roller (506), and the second guide rail (106) is embedded in the V-shaped groove.

5. The multi-head gantry welding machine according to claim 4, characterized in that: A fixing block (508) is installed on the side of the tooling plate (501), and a driving component for driving the tooling plate (501) to move along the second guide rail (106) is provided on the side of the frame (101), and the driving component and the fixing block (508) are connected via a latch component (105).

6. The multi-head gantry welding machine according to any one of claims 1 to 5, characterized in that: A first mounting plate (202) and a second mounting plate (203) capable of moving along the Y-axis direction are provided on the front side of the gantry (201); A plurality of upper welding heads (205) and lower welding heads (206) capable of being raised and lowered are respectively provided on the first mounting plate (202) and the second mounting plate (203), and the number and positions of the upper welding heads (205) and the lower welding heads (206) correspond to each other.

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