Automobile frame part welding equipment and welding method thereof

Abstract

The invention discloses automobile frame part welding equipment and a welding method thereof, and relates to the field of welding, the automobile frame part welding equipment comprises a bottom plate, a bearing plate and a welding machine arm main body, an overturning base mechanism is fixedly connected to the middle of the upper side of the bottom plate, and a part limiting mechanism is movably connected to the middle of the overturning base mechanism; the bearing plate is fixedly connected to the middle of the upper side of the component limiting mechanism. A frame is placed on a bearing plate, a second servo motor is controlled to be started, after transmission, multiple sets of side frames outside the frame are driven to synchronously get close to the middle, the frame is limited in the middle area of the bearing plate, the initial position of each sliding seat on a corresponding lead screw is adjusted according to the size of the frame, and after it is guaranteed that the sliding seats are driven to move back and forth after being powered, the sliding seats are driven to move back and forth. The sliding seats can be attached to the frame when the moving distances of the sliding seats are the same, so that the position of the frame can be fixed without excessive manual intervention, operation is more convenient, and an accurate position basis is provided for subsequent arrangement of parts.

Description

Technical Field

[0001] The invention relates to the technical field of welding, in particular to a welding device for automobile frame parts and a welding method thereof. Background Art

[0002] With the rapid development of the automobile industry, the production and quality requirements of automobiles are constantly increasing. As the skeleton of the car, the automobile frame bears the weight of many parts such as the body, engine, suspension, etc., and has to withstand various complex forces during the driving process of the car, including the impact force from the road, the inertia force during vehicle acceleration and braking, etc. The quality and connection reliability of the frame parts are directly related to the overall performance and safety of the car.

[0003] However, in the prior art, although some semi-automatic welding equipment has improved welding efficiency to a certain extent, they still require manual operation, such as fixing the welding position and angle, etc. When welding a product such as an automobile frame with multiple complex parts, frequent manual intervention will introduce errors and lead to reduced weld quality. Summary of the invention

[0004] The object of the present invention is to provide a welding device for automobile frame parts and a welding method thereof to solve the problems raised by the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: an automobile frame component welding device, comprising a bottom plate, a bearing plate and a welding robot arm body, wherein a flip base mechanism is fixedly connected to the middle part of the upper side of the bottom plate, a component limiting mechanism is movably connected to the middle part of the flip base mechanism, and the bearing plate is fixedly connected to the middle part of the upper side of the component limiting mechanism; The flip base mechanism is used to drive the component limiting mechanism and the bearing plate to flip, and the component limiting mechanism includes an outer frame, a half frame, a cross frame, a transmission assembly and a limiting assembly. The half frame and the cross frame are fixedly connected inside the outer frame, and the transmission assembly is arranged in the middle of the cross frame. The upper sides of the half frame and the cross frame are both provided with limiting assemblies, and multiple groups of the limiting assemblies are used to limit the automobile frame; The transmission assembly is used to drive multiple groups of the limiting assemblies to move and limit, and the transmission assembly includes a second servo motor, a square seat, a first bevel gear, a second bevel gear, a bar seat, a first gear and a second gear. A group of the first bevel gears and multiple groups of the second bevel gears are distributed in a ring and are adjacent to each other and meshed, wherein some of the second bevel gears are coaxially driven with the first gear, the first gear and the second gear are meshed and connected, and the second gear is transmission-connected to a group of the limiting assemblies through a universal joint, wherein another part of the second bevel gears is transmission-connected to the limiting assembly.

[0006] Preferably, the first bevel gear and the second bevel gear are both rotatably mounted inside the square seat, and the first gear and the second gear are both rotatably mounted inside the bar seat.

[0007] Preferably, the square seat and the strip seat are both fixedly connected to the middle of the horizontal frame, and the second servo motor is drivingly connected to the first bevel gear.

[0008] Preferably, the limiting assembly includes a side frame, a slide seat, a lead screw and a guide rail, and a plurality of groups of the lead screws are respectively connected to the second servo motor, the second gear and the second bevel gear.

[0009] Preferably, the slide seat is meshingly connected with the lead screw, and the guide rail is slidably engaged on the lower side of the slide seat.

[0010] Preferably, the side frame is fixedly connected to the upper side of the slide seat, and the plurality of groups of guide rails are respectively fixedly connected to the upper sides of the half frame and the cross frame.

[0011] Preferably, two groups of half frames are vertically fixedly connected to two sides of the horizontal frame.

[0012] Preferably, the flip base mechanism includes a column, a first servo motor, a support shell, a third gear, a connecting plate, a fourth gear and a cross tube, the two ends of the outer frame are respectively fixedly connected to the connecting plate, the connecting plate is transmission connected to the third gear, and the third gear is meshingly connected to the fourth gear.

[0013] Preferably, the fourth gear is transmission-connected to the first servo motor, the third gear and the fourth gear are both rotatably mounted inside the support shell, the first servo motor is fixedly mounted on one side of the support shell, the support shell is fixedly connected to the upper end of the column, and the two groups of columns are fixedly connected via the cross tube.

[0014] A welding method for automobile frame parts welding equipment comprises the following steps: S1, placing the frame on the bearing plate, controlling the second servo motor to start, driving the second servo motor to rotate, thereby engaging the first bevel gear; S2, the second bevel gears on both sides drive the respective connected lead screws to rotate through transmission, so that the two sets of side frames move closer to the frame; S3, the rear end of the output shaft of the second servo motor drives a set of lead screws to rotate at the same time, and the first bevel gear located on the opposite side of the second servo motor is meshed and rotated, which also drives a set of lead screws to rotate, and the two sets of lead screws drive the side frames connected to them to move closer to the vehicle frame; S4. Multiple sets of side frames are brought together from multiple directions to limit the frame, the flip base mechanism drives the frame to flip, the robot arm is used to place the parts in the predetermined position of the frame, and the welding robot arm body is used to perform welding.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, by placing the frame on the load-bearing plate, the second servo motor is controlled to start, and after transmission, multiple groups of side frames outside the frame are driven to move synchronously to the middle, and the frame is limited in the middle area of ​​the load-bearing plate. The initial position of each slide on the corresponding lead screw is adjusted according to the size of the frame to ensure that after receiving power, each slide moves the same distance to fit the frame. Therefore, the position of the frame can be fixed without excessive manual intervention, the operation is more convenient, and a precise position basis is provided for the subsequent arrangement of parts.

[0016] 2. In the present invention, one group of the first bevel gears is driven to rotate by the second servo motor, and the first bevel gears simultaneously engage with the second bevel gears on both sides to rotate, and then engage with the remaining group of first bevel gears to rotate, and each group of first bevel gears drives the corresponding limit assembly to move, so that a total power is divided into multiple component forces for transmission, thereby improving the synchronization of the movement of multiple limit assemblies.

[0017] 3. In the present invention, the parts are clamped and placed on the expected position of the frame with the help of a robotic arm, the first servo motor is controlled to start, the first servo motor drives the fourth gear to rotate, the fourth gear engages the third gear to rotate, the third gear drives the connecting plate to rotate, the connecting plate is connected to the two ends of the outer frame, two groups of half frames and a group of cross frames are connected to the outer frame to form a stable load-bearing frame, thereby the outer frame drives the load-bearing plate and the frame above it to flip and adjust to a suitable angle to accommodate the placement of parts, then the welding robot arm body is started to weld the connection position, thereby completing the welding of parts, and by providing a precise basic position, it is ensured that the position of the parts placed by the robotic arm each time does not deviate, thereby improving the accuracy of welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a three-dimensional structural schematic diagram of an automobile frame component welding device of the present invention; Figure 2 A top view of an automobile frame component welding device according to the present invention; Figure 3 It is a three-dimensional structural schematic diagram of a welding device for automobile frame parts of the present invention; Figure 4 It is a three-dimensional structural schematic diagram of a component limiting mechanism in a welding device for automobile frame components of the present invention; Figure 5 This invention is a kind of automobile frame parts welding equipment Figure 4 A schematic diagram of the enlarged three-dimensional structure at center A; Figure 6 This invention is a kind of automobile frame parts welding equipment Figure 4 A schematic diagram of the three-dimensional structure enlarged at B in the middle; Figure 7 The present invention is a schematic diagram of the three-dimensional structure of a flip base mechanism in an automobile frame component welding device.

[0019] In the figure: 1. bottom plate; 2. flip base mechanism; 21. column; 22. first servo motor; 23. support shell; 24. third gear; 25. connecting plate; 26. fourth gear; 27. cross tube; 3. component limiting mechanism; 31. outer frame; 32. half frame; 33. cross frame; 34. transmission assembly; 341. second servo motor; 342. square seat; 343. first bevel gear; 344. second bevel gear; 345. strip seat; 346. first gear; 347. second gear; 35. limiting assembly; 351. side frame; 352. slide seat; 353. lead screw; 354. guide rail; 4. load-bearing plate; 5. welding machine arm body. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Example 1: Reference Figure 1-Figure 7As shown: a welding device for automobile frame parts, including a bottom plate 1, a bearing plate 4 and a welding robot arm body 5, a flip base mechanism 2 is fixedly connected to the middle part of the upper side of the bottom plate 1, a component limiting mechanism 3 is movably connected to the middle part of the flip base mechanism 2, the bearing plate 4 is fixedly connected to the middle part of the upper side of the component limiting mechanism 3, the flip base mechanism 2 is used to drive the component limiting mechanism 3 and the bearing plate 4 to flip, the component limiting mechanism 3 includes an outer frame 31, a half frame 32, a cross frame 33, a transmission assembly 34 and a limiting assembly 35, the half frame 32 and the cross frame 33 are fixedly connected to the inside of the outer frame 31, the transmission assembly 34 is connected to the inner part of the outer frame 31, and the transmission assembly 35 is connected to the inner part of the outer frame 31. The moving assembly 34 is arranged in the middle of the cross frame 33, and the upper sides of the half frame 32 and the cross frame 33 are both provided with a limit assembly 35, and the multiple groups of limit assemblies 35 are used to limit the automobile frame. The transmission assembly 34 is used to drive the multiple groups of limit assemblies 35 to move and limit. The transmission assembly 34 includes a second servo motor 341, a square seat 342, a first bevel gear 343, a second bevel gear 344, a bar seat 345, a first gear 346 and a second gear 347. A group of first bevel gears 343 and multiple groups of second bevel gears 344 are distributed in an annular manner and mesh with each other adjacently, wherein some of the second The bevel gear 344 is coaxially driven with the first gear 346, the first gear 346 is meshed with the second gear 347, the second gear 347 is connected to a set of limit assemblies 35 through a universal joint, wherein another part of the second bevel gear 344 is connected to the limit assemblies 35, the first bevel gear 343 and the second bevel gear 344 are both rotatably mounted inside the square seat 342, the first gear 346 and the second gear 347 are both rotatably mounted inside the strip seat 345, the square seat 342 and the strip seat 345 are fixedly connected to the middle of the cross frame 33, and the second servo motor 34 1 is transmission connected with the first bevel gear 343, two groups of half frames 32 are vertically fixedly connected to the two sides of the cross frame 33, the limiting assembly 35 includes a side frame 351, a slide 352, a lead screw 353 and a guide rail 354, multiple groups of lead screws 353 are transmission connected with the second servo motor 341, the second gear 347 and the second bevel gear 344 respectively, the slide 352 is meshed with the lead screw 353, the guide rail 354 is slidably clamped on the lower side of the slide 352, the side frame 351 is fixedly connected to the upper side of the slide 352, and multiple groups of guide rails 354 are fixedly connected to the upper sides of the half frames 32 and the cross frame 33 respectively.

[0022] In this embodiment, by placing the frame on the carrying plate 4, the second servo motor 341 is controlled to start, and the second servo motor 341 drives one group of first bevel gears 343 to rotate. The first bevel gears 343 simultaneously mesh with the second bevel gears 344 on both sides to rotate, and then mesh with the remaining group of first bevel gears 343 to rotate. The second bevel gears 344 on both sides drive the first gears 346 connected to them to rotate in the bar seat 345 through the coupling. After meshing with the second gear 347, under the connection action of the universal joint, the lead screws 353 connected to them are driven to rotate. The lead screws 353 rotate in the middle of the slide seat 352. The component force of the meshing force generated by the rotation is applied to the slide seat 352, so that it moves along the length direction of the guide rail 354, driving the side frame 351 toward the frame. The rear end of the output shaft of the second servo motor 341 is connected to another set of lead screws 353. After the second servo motor 341 rotates, it also drives a set of side frames 351 to approach the frame, and the remaining set of first bevel gears 343 also rotate after meshing, and rotate in the same way. Therefore, the multiple sets of side frames 351 outside the frame are synchronously moved to the middle, and the frame is limited to the middle area of ​​the load-bearing plate 4. The initial position of each slide 352 on the corresponding lead screw 353 is adjusted according to the size of the frame to ensure that after receiving power, each slide 352 moves the same distance to fit the frame. Therefore, the frame position can be fixed without excessive manual intervention, and the operation is more convenient, providing a precise position basis for the arrangement of subsequent components.

[0023] Embodiment 2: According to Figure 3-Figure 7 As shown, the flip base mechanism 2 includes a column 21, a first servo motor 22, a support shell 23, a third gear 24, a connecting plate 25, a fourth gear 26 and a transverse tube 27. The two ends of the outer frame 31 are respectively fixedly connected to the connecting plate 25, the connecting plate 25 is transmission-connected to the third gear 24, the third gear 24 and the fourth gear 26 are meshingly connected, the fourth gear 26 is transmission-connected to the first servo motor 22, the third gear 24 and the fourth gear 26 are both rotatably mounted inside the support shell 23, the first servo motor 22 is fixedly mounted on one side of the support shell 23, the support shell 23 is fixedly connected to the upper end of the column 21, and the two groups of columns 21 are fixedly connected by the transverse tube 27.

[0024] In this embodiment, with the help of a robotic arm, the parts are clamped and placed at the expected position of the frame, the first servo motor 22 is controlled to start, the first servo motor 22 drives the fourth gear 26 to rotate, the fourth gear 26 engages the third gear 24 to rotate, the third gear 24 drives the connecting disk 25 to rotate, and the connecting disk 25 is connected to the two ends of the outer frame 31, thereby the outer frame 31 drives the load-bearing plate 4 and the upper frame of the frame to flip, adjust to a suitable angle to accommodate the placement of parts, and then the welding robot arm body 5 is started to weld the connection position, thereby completing the welding of parts, and by providing a precise basic position, it is ensured that the position of the robot arm placing the parts each time does not deviate, thereby improving the accuracy of welding.

[0025] The use method and working principle of the device are as follows: the frame is placed on the carrying plate 4, the second servo motor 341 is controlled to start, the second servo motor 341 drives one group of first bevel gears 343 to rotate, the first bevel gear 343 simultaneously meshes with the second bevel gears 344 on both sides to rotate, and then meshes with the remaining group of first bevel gears 343 to rotate; The second bevel gears 344 on both sides drive the first gears 346 connected to them to rotate in the bar seat 345 through the coupling, and after meshing with the second gears 347, they drive the lead screws 353 connected to them to rotate under the connection of the universal joint. The lead screws 353 rotate in the middle of the slide seat 352, and the component force of the meshing force generated by the rotation is applied to the slide seat 352, so that it moves along the length direction of the guide rail 354, driving the side frame 351 to approach the edge of the frame; The rear end of the output shaft of the second servo motor 341 is connected to another set of lead screws 353. After the second servo motor 341 rotates, it also drives one set of side frames 351 to approach the frame, and the remaining set of first bevel gears 343 also rotate after being meshed, and rotate in the same way. Therefore, the multiple sets of side frames 351 outside the frame are synchronously moved to the middle, and the frame is limited in the middle area of ​​the bearing plate 4, and the position of the frame can be fixed without excessive human intervention. With the help of the robotic arm, the parts are clamped and placed at the expected position of the frame, and the first servo motor 22 is controlled to start. The first servo motor 22 drives the fourth gear 26 to rotate, and the fourth gear 26 engages the third gear 24 to rotate. The third gear 24 drives the connecting disk 25 to rotate. The connecting disk 25 is connected to the two ends of the outer frame 31. The outer frame 31 drives the load-bearing plate 4 and the frame above it to flip and adjust to a suitable angle to accommodate the placement of the parts. Then, the welding robot arm body 5 is started to weld the connection position, thereby completing the welding of the parts.

[0026] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A welding device for automobile frame parts, comprising a base plate (1), a bearing plate (4) and a welding robot arm body (5), characterized in that: The middle part of the upper side of the bottom plate (1) is fixedly connected to a flip base mechanism (2), the middle part of the flip base mechanism (2) is movably connected to a component limiting mechanism (3), and the bearing plate (4) is fixedly connected to the middle part of the upper side of the component limiting mechanism (3); The flip base mechanism (2) is used to drive the component limiting mechanism (3) and the bearing plate (4) to flip, the component limiting mechanism (3) comprising an outer frame (31), a half frame (32), a cross frame (33), a transmission assembly (34) and a limiting assembly (35), the half frame (32) and the cross frame (33) are fixedly connected inside the outer frame (31), the transmission assembly (34) is arranged in the middle of the cross frame (33), and the upper sides of the half frame (32) and the cross frame (33) are both provided with limiting assemblies (35), and a plurality of groups of limiting assemblies (35) are used to limit the vehicle frame; The transmission assembly (34) is used to drive the plurality of groups of the position-limiting assemblies (35) to move and position-limit. The transmission assembly (34) comprises a second servo motor (341), a square seat (342), a first bevel gear (343), a second bevel gear (344), a bar seat (345), a first gear (346) and a second gear (347). A group of the first bevel gears (343) and a plurality of groups of the second bevel gears (344) are distributed in an annular shape and mesh with each other adjacently, wherein a portion of the second bevel gears (344) are coaxially driven with the first gear (346), the first gear (346) and the second gear (347) are meshedly connected, the second gear (347) is transmission-connected to a group of the position-limiting assemblies (35) via a universal joint, wherein another portion of the second bevel gears (344) are transmission-connected to the position-limiting assemblies (35).

2. The automobile frame parts welding equipment according to claim 1, characterized in that: The first bevel gear (343) and the second bevel gear (344) are both rotatably mounted inside the square seat (342), and the first gear (346) and the second gear (347) are both rotatably mounted inside the bar seat (345).

3. The automobile frame parts welding equipment according to claim 2, characterized in that: The square seat (342) and the strip seat (345) are both fixedly connected to the middle of the horizontal frame (33), and the second servo motor (341) is drivingly connected to the first bevel gear (343).

4. The automobile frame parts welding equipment according to claim 3 is characterized in that: The position limiting assembly (35) comprises a side frame (351), a slide seat (352), a lead screw (353) and a guide rail (354); a plurality of sets of the lead screws (353) are respectively connected in transmission with the second servo motor (341), the second gear (347) and the second bevel gear (344).

5. The automobile frame parts welding equipment according to claim 4, characterized in that: The slide seat (352) is meshingly connected with the lead screw (353), and the guide rail (354) is slidably engaged on the lower side of the slide seat (352).

6. The automobile frame parts welding equipment according to claim 5, characterized in that: The side frame (351) is fixedly connected to the upper side of the slide seat (352), and the plurality of groups of guide rails (354) are respectively fixedly connected to the upper sides of the half frame (32) and the cross frame (33).

7. The automobile frame parts welding equipment according to claim 6, characterized in that: The two groups of half frames (32) are vertically fixedly connected to the two sides of the cross frame (33).

8. The automobile frame parts welding equipment according to claim 7, characterized in that: The flip base mechanism (2) comprises a column (21), a first servo motor (22), a support shell (23), a third gear (24), a connecting plate (25), a fourth gear (26) and a transverse tube (27); both ends of the outer frame (31) are respectively fixedly connected to the connecting plate (25); the connecting plate (25) is transmission-connected to the third gear (24); and the third gear (24) and the fourth gear (26) are meshingly connected.

9. The automobile frame parts welding equipment according to claim 8, characterized in that: The fourth gear (26) is transmission-connected to the first servo motor (22); the third gear (24) and the fourth gear (26) are both rotatably mounted inside the support shell (23); the first servo motor (22) is fixedly mounted on one side of the support shell (23); the support shell (23) is fixedly connected to the upper end of the column (21); and the two groups of columns (21) are fixedly connected via the transverse tube (27).

10. A welding method for automobile frame parts welding equipment, using the automobile frame parts welding equipment as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1, placing the vehicle frame on the bearing plate (4), controlling the second servo motor (341) to start, driving the second servo motor (341) to rotate, thereby engaging the first bevel gear (343); S2, the second bevel gears (344) on both sides drive the respective connected lead screws (353) to rotate, so that the two sets of side frames (351) move closer to the vehicle frame; S3, the rear end of the output shaft of the second servo motor (341) simultaneously drives a set of lead screws (353) to rotate, and the first bevel gear (343) located on the opposite side of the second servo motor (341) is meshed and rotated, and also drives a set of lead screws (353) to rotate, and the two sets of lead screws (353) drive the side frames (351) connected to them to move closer to the vehicle frame; S4, multiple sets of side frames (351) are brought together from multiple directions to limit the frame, the turning base mechanism (2) drives the frame to turn, the robot arm is cooperated to place the parts at the predetermined position of the frame, and the welding robot arm body (5) is cooperated to perform welding.

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