Fine welding robot for automobile part manufacturing and welding method thereof

Abstract

The fine welding robot for automobile part manufacturing comprises a welding table, a welding machine, a rotating frame, a clamping workpiece, an overturning assembly and a limiting assembly, the welding machine is arranged on the back face of the welding table, the rotating frame is connected to the top of the welding table in a penetrating and inserting mode, and the clamping workpiece is arranged on the top of the rotating frame. Through the design of the rotating frame, the overturning assembly, the limiting piece and the moving piece, during use, a product is limited on the rotating frame, rotation of the rotating frame is limited through the limiting piece, and when the rotating frame needs to be rotated, the limiting piece is driven by the moving piece to move towards the side away from the rotating frame, so that the limiting piece cannot limit the rotating frame; and then the rotating frame is driven to rotate through the overturning assembly, finally, the limiting piece is driven to move to one side of the rotating frame through the moving piece, rotation of the rotating frame is limited, and the situation that the welding position deviates when products are welded is avoided.

Description

Technical Field

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

[0002] The automotive welding robot is a high-precision automated equipment specially used for car body welding. It has multi-axis linkage, laser tracking and intelligent programming functions to improve production efficiency and welding quality.

[0003] When operating, traditional welding robots usually need to first fix the product to be welded on a rotatable frame using a special clamp, and then a welding actuator (such as a welding gun or laser welding head) set on one side of the frame will weld the product; after completing the welding operation on one side of the product, the driving motor drives the rotating frame and the product fixed on it to rotate at a precise angle (usually 180°) so that the welding mechanism can continue to weld the other side of the product; however, since the rotating frame lacks a reliable locking or buffering mechanism during rotation, when the welding mechanism applies pressure to the product or external equipment accidentally touches the frame, it will cause unexpected displacement or vibration of the rotating frame. This abnormal rotation will cause the welding path to deviate, thereby resulting in welding defects or scrap of the product. Summary of the Invention

[0004] The object of the present invention is to provide a sophisticated welding robot and a welding method thereof for manufacturing automobile parts, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a precision welding robot for manufacturing automobile parts, comprising: welding table; A welding machine, which is arranged on the back of the welding table; A rotating frame, the rotating frame being connected through the top of the welding table; A clamping workpiece, the clamping workpiece being arranged on the top of the rotating frame and being used to fix the position of the product; A flip assembly, the flip assembly being arranged on the front side of the rotating frame and being used to rotate the rotating frame; The limiting component is used to limit the rotation of the rotating frame. The limiting component includes a limiting member arranged on one side of the rotating frame. One side of the limiting member is provided with a moving member for moving the position of the limiting member.

[0006] Preferably, the flip assembly includes first bearings symmetrically inserted and connected to the front and back of the welding table, the front and back of the rotating frame are symmetrically fixedly connected with fixed shafts, and the first bearing is sleeved on one end of the fixed shaft.

[0007] Preferably, a first gear is sleeved on the middle of the fixed shaft, a half gear is meshed with the bottom of the first gear, a connecting shaft is inserted and connected to the middle of the half gear, and a driving member is provided on the front of the connecting shaft.

[0008] Preferably, the driving member includes a second gear fixedly connected to one end of the connecting shaft, and a tooth plate is meshed at the bottom of the second gear.

[0009] Preferably, a mounting plate is fixedly connected to the front of the welding table, a second bearing is provided at the connection between the mounting plate and the connecting shaft, a limiting block is fixedly connected to the inner wall of one side of the mounting plate, a limiting groove is provided on one side of the tooth plate, the limiting block is inserted into the inside of the limiting groove, and an electric push rod for moving the position of the tooth plate is fixedly connected to the other side of the mounting plate.

[0010] Preferably, the limiting member includes a sliding block arranged on one side of the rotating frame, a limiting plate for pressing the rotating frame is symmetrically arranged on one side of the sliding block, a pushing block is fixedly connected to one side of the limiting plate, a second spring is arranged on one side of the pushing block, a pushing cavity is opened in the middle of the sliding block, the pushing block and the second spring are both inserted and connected inside the pushing cavity, a limiting rod is fixedly connected between the inner walls on both sides of the pushing cavity, and the limiting rod is inserted and connected to the top of the pushing block.

[0011] Preferably, the moving member includes a first spring arranged on one side of the sliding block, a cam is provided on one side of the sliding block, a transmission shaft is fixedly connected to one side of the cam, and a transmission part is provided on the front side of the transmission shaft.

[0012] Preferably, a fixed seat is fixedly connected to one side of the welding table, a sliding cavity is opened in the middle of the fixed seat, the sliding block is inserted and connected inside the sliding cavity, an outlet groove is opened on the inner wall of one side of the sliding cavity, the limiting plate is inserted and connected inside the outlet groove, a sliding rail is provided on the inner wall of the bottom end of the sliding cavity, the sliding rail is inserted and connected to the bottom of the sliding cavity, and a third bearing is fixedly connected to the back of the sliding cavity, and the third bearing is sleeved in the middle of the transmission shaft.

[0013] Preferably, the transmission part includes a driving wheel fixedly connected to the front face of the second gear, the middle part of the driving wheel is connected to a transmission belt, one side of the transmission belt is connected to a driven wheel, and the driven wheel is fixedly connected to one end of the transmission shaft.

[0014] A precision welding robot for automobile parts manufacturing, wherein the welding method includes the precision welding robot for automobile production, comprising: The first step is to clamp the object to be welded on the top of the rotating frame by clamping the workpiece, and weld one side of the object through the welding machine; In the second step, the toothed plate is driven to move by the electric push rod, and the toothed plate is driven to rotate the second gear, and the second gear drives the driving wheel and the half gear to rotate; when the second gear rotates to the front 180 degrees, the driving wheel, the transmission belt and the driven wheel cooperate to drive the transmission shaft and the cam to rotate, so that one end of the cam is separated from the sliding block, and the sliding block is driven by the first spring to move to the side of the first spring, thereby driving the limiting plate to separate from the rotating frame through the sliding block; In the third step, when the second gear rotates to 180 to 360 degrees, the cam drives the first gear to rotate, and the first gear drives the rotating frame to rotate. When the rotation is close to 360 degrees, the cam drives the limiting plate to move to one side of the rotating frame, and the rotating rotating frame pushes one of the limiting plates to the side away from the rotating frame. When the rotating frame rotates to fit with the other limiting plate, one of the limiting plates will be pushed by the second spring to the side of the rotating frame away from the other limiting plate, and the rotating frame is clamped and fixed by the two limiting plates. The fourth step is to weld the other side of the object using a welding machine.

[0015] Technical effects and advantages of the present invention: The present invention uses the design of a rotating frame, a flip assembly, a limiting piece and a moving piece. When in use, the product is restricted on the rotating frame, and the rotating frame is restricted from rotating by the limiting piece. When the rotating frame needs to be rotated, the limiting piece is first driven by the moving piece to move to a side away from the rotating frame so that the limiting piece cannot restrict the rotating frame. The rotating frame is then driven to rotate by the flip assembly. Finally, the limiting piece is driven by the moving piece to move to one side of the rotating frame and restrict the rotation of the rotating frame, thereby avoiding the occurrence of welding position deviation when welding products. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention.

[0017] Figure 2 It is a schematic diagram of the front structure of the present invention.

[0018] Figure 3 It is a schematic diagram of the side sectional structure of the present invention.

[0019] Figure 4 This is a schematic diagram of the back cross-sectional structure of the present invention.

[0020] Figure 5 This is the second schematic diagram of the back cross-sectional structure of the present invention.

[0021] Figure 6 It is a schematic diagram of the cross-sectional structure of the present invention from above.

[0022] Figure 7 It is a schematic diagram of the three-dimensional structure of the flip assembly of the present invention.

[0023] Figure 8 It is a schematic diagram of the three-dimensional structure of the limiting member of the present invention.

[0024] In the figure: 1. welding table; 2. welding machine; 3. rotating frame; 4. clamping workpiece; 5. flip assembly; 501. first gear; 502. fixed shaft; 503. first bearing; 504. mounting plate; 505. connecting shaft; 506. second gear; 507. second bearing; 508. tooth plate; 509. limiting block; 510. half gear; 6. electric push rod; 7. limiting assembly; 701. pushing block; 702. limiting plate; 703. limiting rod; 704. sliding block; 705. sliding cavity; 706. third bearing; 707. transmission shaft; 708. fixed seat; 709. first spring; 710. cam; 711. second spring; 712. pushing cavity; 713. slide rail; 714. through groove; 8. transmission part; 801. driving wheel; 802. transmission belt; 803. driven wheel. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments 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 making creative efforts are within the scope of protection of the present invention.

[0026] The present invention provides Figure 1-8 Shown: Example

[0027] A precision welding robot for manufacturing automobile parts, comprising: Welding station 1; Welding machine 2, which is arranged on the back of welding table 1; The rotating frame 3 is connected to the top of the welding table 1; The workpiece clamping device 4 is provided on the top of the rotating frame 3 and is used to fix the position of the product; The flip assembly 5 is arranged on the front of the rotating frame 3 and is used to rotate the rotating frame 3; The limiting component 7 is used to limit the rotation of the rotating frame 3. The limiting component 7 includes a limiting member arranged on one side of the rotating frame 3. One side of the limiting member is provided with a moving member for moving the position of the limiting member.

[0028] It should be noted that the welding machine 2 is an existing welding equipment, which is composed of a welding head and a mechanical arm. The welding head is moved by the mechanical arm. When in use, the welding head uses heat energy to melt or plastically deform the metal contact surface, thereby achieving a firm connection and completing the welding work; the clamping workpiece 4 is fixed to the rotating frame 3 by bolts, and the clamping workpiece 4 is composed of a clamping plate, a frame and a screw. When in use, the clamping plate is driven to move by the screw to clamp and fix the product; when in use, the product is restricted on the rotating frame 3, and the rotating frame 3 is restricted from rotating by a limiting member. When the rotating frame 3 needs to be rotated, the limiting member is first driven by the moving member to move to the side away from the rotating frame 3, so that the limiting member cannot restrict the rotating frame 3, and then the rotating frame 3 is driven to rotate by the flip assembly 5, and finally the limiting member is driven by the moving member to move to one side of the rotating frame 3 and restrict the rotation of the rotating frame 3 to avoid the occurrence of welding position offset when welding products.

[0029] Specifically, the flip assembly 5 includes a first bearing 503 symmetrically connected to the front and back of the welding table 1, and the front and back of the rotating frame 3 are symmetrically fixedly connected with a fixed shaft 502. The first bearing 503 is sleeved on one end of the fixed shaft 502. The middle of the fixed shaft 502 is sleeved with a first gear 501. The bottom of the first gear 501 is meshed with a half gear 510. The middle of the half gear 510 is inserted and connected with a connecting shaft 505. The front of the connecting shaft 505 is provided with a driving member, which includes a fixed connection to the connecting shaft. A second gear 506 at one end of 505, a tooth plate 508 is engaged at the bottom of the second gear 506, a mounting plate 504 is fixedly connected to the front of the welding table 1, a second bearing 507 is provided at the connection between the mounting plate 504 and the connecting shaft 505, a limiting block 509 is fixedly connected to the inner wall of one side of the mounting plate 504, a limiting groove is provided on one side of the tooth plate 508, the limiting block 509 is inserted into the inside of the limiting groove, and an electric push rod 6 for moving the position of the tooth plate 508 is fixedly connected to the other side of the mounting plate 504.

[0030] It should be noted that the welding table 1 and the rotating frame 3 are connected by a fixed shaft 502 and a first bearing 503. The first bearing 503 is an existing ball bearing. The fixed shaft 502 and the welding table 1 are connected by the first bearing 503, so that the position of the fixed shaft 502 is fixed to the welding table 1, but the fixed shaft 502 can rotate on the welding table 1. The fixed shaft 502 is fixedly connected to the rotating frame 3, so that the position of the rotating frame 3 is restricted while allowing it to rotate on the welding table 1; the electric push rod is provided 6 is an electric actuator that converts the rotational motion of the motor into linear motion. Its working principle is as follows: after the motor is energized, it drives the transmission device to rotate, and converts the rotational force into the linear telescopic motion of the push rod through the thread or gear mechanism, thereby pushing the load to make linear reciprocating motion. The electric push rod 6 is fixedly connected to one side of the mounting plate 504. The push rod part of the electric push rod 6 is inserted and connected to one side of the mounting plate 504 and is connected to the tooth plate 508 located in the mounting plate 504; the number of teeth on the tooth plate 508 is the same as the number of teeth on the second gear 506. The number of teeth is consistent, so that when the tooth plate 508 moves from one side of the bottom of the second gear 506 to the other side, the tooth plate 508 drives the second gear 506 to rotate one circle; the second gear 506 and the half gear 510 are connected by the connecting shaft 505, and a second bearing 507 is provided at the connection between the connecting shaft 505 and the mounting plate 504. The second bearing 507 is an existing ball bearing. While the second bearing 507 fixes the position of the connecting shaft 505, it does not affect the rotation of the connecting shaft 505. The setting of the half gear 510 The shape is consistent with the first gear 501 with half of the teeth removed, and the half of the teeth removed are all located on one side of the gear. When in use, when the half gear 510 rotates one circle, it drives the first gear 501 to rotate half a circle, thereby realizing that the first gear 501 rotating half a circle drives the fixed shaft 502 and the rotating frame 3 to rotate one hundred and eighty degrees; a groove adapted to the limiting block 509 is provided on the side of the tooth plate 508 away from the electric push rod 6, and the tooth plate 508 is limited by the limiting block 509 to avoid the situation where one side of the tooth plate 508 shakes at will.

[0031] Specifically, the limiting member includes a sliding block 704 arranged on one side of the rotating frame 3, and a limiting plate 702 for pressing the rotating frame 3 is symmetrically arranged on one side of the sliding block 704. A pushing block 701 is fixedly connected to one side of the limiting plate 702, and a second spring 711 is provided on one side of the pushing block 701. A pushing cavity 712 is opened in the middle of the sliding block 704, and the pushing block 701 and the second spring 711 are both inserted and connected inside the pushing cavity 712. A limiting rod 703 is fixedly connected between the inner walls on both sides of the pushing cavity 712, and the limiting rod 703 is inserted and connected to the top of the pushing block 701.

[0032] It should be noted that the horizontal longitudinal cross-sections of the two limiting plates 702 are both set to be right-angled trapezoids. When in use, the right-angled sides of the right-angled trapezoids are aligned with the top and bottom of the rotating frame 3, so that the rotation of the rotating frame 3 is restricted by the two limiting plates 702. When the rotating frame 3 is rotated to be aligned with the oblique sides of the limiting plates 702, the rotating frame 3 is continued to be rotated, and the limiting plates 702 are pushed by the rotating frame 3, so that the limiting plates 702 move to the side away from the rotating frame 3 until the rotating frame 3 is rotated between the two limiting plates 702. The block 701 is adapted to enable the pushing block 701 to slide inside the pushing cavity 712. The pushing cavity 712 is located on the side of the pushing block 701 away from the limiting plate 702. When in use, it is used to drive the pushing block 701 and the limiting plate 702 to move toward one side of the rotating frame 3. The two ends of the limiting rod 703 are fixedly connected to the inner walls on both sides of the pushing cavity 712, and the limiting rod 703 is inserted and connected to the top of the pushing block 701. Through the restriction of the limiting rod 703, the pushing block 701 cannot shake arbitrarily inside the pushing cavity 712.

[0033] Specifically, the moving part includes a first spring 709 arranged on one side of the sliding block 704, a cam 710 is provided on one side of the sliding block 704, a transmission shaft 707 is fixedly connected to one side of the cam 710, a transmission part 8 is provided on the front of the transmission shaft 707, a fixed seat 708 is fixedly connected to one side of the welding table 1, a sliding cavity 705 is provided in the middle of the fixed seat 708, the sliding block 704 is inserted and connected to the inside of the sliding cavity 705, a through groove 714 is provided on the inner wall of one side of the sliding cavity 705, the limiting plate 702 is inserted and connected to the inside of the through groove 714, a sliding rail 713 is provided on the inner wall of the bottom end of the sliding cavity 705, the sliding rail 713 is inserted and connected to the bottom of the sliding cavity 705, and a third bearing 706 is fixedly connected to the back of the sliding cavity 705, and the third bearing 706 is sleeved on the middle of the transmission shaft 707.

[0034] It should be noted that the transmission shaft 707 is inserted and connected to the inner wall of the front side of the sliding cavity 705, so that the transmission shaft 707 can be connected to the transmission part 8 located on the front side of the fixed seat 708, and the cam 710 is connected to the fixed seat 708 through the transmission shaft 707, so that the transmission shaft 707 and the cam 710 are driven to rotate through the transmission part 8. When the protruding part of the cam 710 contacts the sliding block 704, the sliding block 704 is driven to move toward the side of the rotating frame 3 through the cam 710. When the protruding part of the cam 710 is away from the sliding block 704, the sliding block 70 is driven to move toward the side away from the rotating frame 3 through the first spring 709.

[0035] Specifically, the transmission part 8 includes a driving wheel 801 fixedly connected to the front of the second gear 506, the middle part of the driving wheel 801 is connected to the transmission belt 802, and one side of the transmission belt 802 is connected to the driven wheel 803, and the driven wheel 803 is fixedly connected to one end of the transmission shaft 707.

[0036] It should be noted that the driving wheel 801, transmission belt 802 and driven wheel 803 are an existing power transmission mechanism. When the transmission shaft 707 needs to be rotated, the second gear 506 drives the driving wheel 801 to rotate, and the driving wheel 801 drives the transmission belt 802 to move. The moving transmission belt 802 drives the driven wheel 803 to rotate, thereby realizing the rotation of the transmission shaft 707 by the rotating driven wheel 803. Through this design, when the second gear 506 rotates, it can drive the cam 710 at one end of the transmission shaft 707 to rotate, so that when the cam 710 rotates 360 degrees, the rotating frame 3 rotates 180 degrees. Example

[0037] A precision welding robot for automobile parts manufacturing, applicable to the precision welding robot for automobile production, comprising: In the first step, the object to be welded is clamped and fixed on the top of the rotating frame 3 by clamping the workpiece 4, and one side of the object is welded by the welding machine 2; In the second step, the toothed plate 508 is driven to move by the electric push rod 6, and the toothed plate 508 drives the second gear 506 to rotate, and the second gear 506 drives the driving wheel 801 and the half gear 510 to rotate; when the second gear 506 rotates to the front 180 degrees, the driving wheel 801, the transmission belt 802 and the driven wheel 803 cooperate to drive the transmission shaft 707 and the cam 710 to rotate, so that one end of the cam 710 is separated from the sliding block 704, and the sliding block 704 is driven by the first spring 709 to move to the side of the first spring 709, thereby driving the limiting plate 702 to separate from the rotating frame 3 through the sliding block 704; In the third step, when the second gear 506 rotates to 180 to 360 degrees, the cam 710 drives the first gear 501 to rotate, and the first gear 501 drives the rotating frame 3 to rotate. When the rotation reaches nearly 360 degrees, the cam 710 drives the limiting plate 702 to move to one side of the rotating frame 3, and the rotating rotating frame 3 pushes one of the limiting plates 702 to the side away from the rotating frame 3. When the rotating frame 3 rotates to fit with the other limiting plate 702, one of the limiting plates 702 is pushed by the second spring 711 to the side of the rotating frame 3 away from the other limiting plate 702, and the rotating frame 3 is clamped and fixed by the two limiting plates 702. The fourth step is to weld the other side of the object using the welding machine 2.

[0038] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or 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 scope of protection of the present invention.

Claims

1. A precision welding robot for automobile parts manufacturing, characterized in that: include: Welding station (1); A welding machine (2), the welding machine (2) being arranged on the back of the welding table (1); A rotating frame (3), the rotating frame (3) being inserted and connected to the top of the welding table (1); A clamping workpiece (4), the clamping workpiece (4) being arranged on the top of the rotating frame (3), and the clamping workpiece (4) being used to fix the position of the product; A flip assembly (5), the flip assembly (5) being arranged on the front side of the rotating frame (3), and the flip assembly (5) being used to rotate the rotating frame (3); A limiting component (7) is used to limit the rotation of the rotating frame (3), and the limiting component (7) includes a limiting member arranged on one side of the rotating frame (3), and a moving member for moving the position of the limiting member is provided on one side of the limiting member.

2. A precision welding robot for automobile parts manufacturing according to claim 1, characterized in that: The flip assembly (5) comprises a first bearing (503) symmetrically inserted and connected to the front and back of the welding table (1); the front and back of the rotating frame (3) are symmetrically fixedly connected to a fixed shaft (502); and the first bearing (503) is sleeved on one end of the fixed shaft (502).

3. A precision welding robot for automobile parts manufacturing according to claim 2, characterized in that: The middle of the fixed shaft (502) is sleeved with a first gear (501), the bottom of the first gear (501) is meshed with a half gear (510), the middle of the half gear (510) is interlaced with a connecting shaft (505), and the front of the connecting shaft (505) is provided with a driving member.

4. A precision welding robot for automobile parts manufacturing according to claim 3, characterized in that: The driving member comprises a second gear (506) fixedly connected to one end of the connecting shaft (505), and a toothed plate (508) is meshed at the bottom of the second gear (506).

5. A precision welding robot for automobile parts manufacturing according to claim 4, characterized in that: The front of the welding table (1) is fixedly connected to a mounting plate (504), a second bearing (507) is provided at the connection between the mounting plate (504) and the connecting shaft (505), a limiting block (509) is fixedly connected to the inner wall of one side of the mounting plate (504), a limiting groove is provided on one side of the tooth plate (508), the limiting block (509) is inserted into the interior of the limiting groove, and an electric push rod (6) for moving the position of the tooth plate (508) is fixedly connected to the other side of the mounting plate (504).

6. A precision welding robot for automobile parts manufacturing according to claim 5, characterized in that: The limiting member comprises a sliding block (704) arranged on one side of the rotating frame (3); a limiting plate (702) for pressing the rotating frame (3) is symmetrically arranged on one side of the sliding block (704); a pushing block (701) is fixedly connected to one side of the limiting plate (702); a second spring (711) is arranged on one side of the pushing block (701); a pushing cavity (712) is opened in the middle of the sliding block (704); the pushing block (701) and the second spring (711) are both inserted and connected inside the pushing cavity (712); a limiting rod (703) is fixedly connected between the inner walls on both sides of the pushing cavity (712); and the limiting rod (703) is inserted and connected to the top of the pushing block (701).

7. A precision welding robot for automobile parts manufacturing according to claim 6, characterized in that: The moving member comprises a first spring (709) arranged on one side of the sliding block (704); a cam (710) is arranged on one side of the sliding block (704); a transmission shaft (707) is fixedly connected to one side of the cam (710); and a transmission part (8) is arranged on the front side of the transmission shaft (707).

8. The precision welding robot for automobile parts manufacturing according to claim 7, characterized in that: A fixed seat (708) is fixedly connected to one side of the welding table (1), a sliding cavity (705) is provided in the middle of the fixed seat (708), the sliding block (704) is inserted and connected inside the sliding cavity (705), an inner wall of one side of the sliding cavity (705) is provided with a through groove (714), the limiting plate (702) is inserted and connected inside the through groove (714), a sliding rail (713) is provided on the inner wall of the bottom end of the sliding cavity (705), the sliding rail (713) is inserted and connected to the bottom of the sliding cavity (705), and a third bearing (706) is fixedly connected to the back of the sliding cavity (705), and the third bearing (706) is sleeved on the middle of the transmission shaft (707).

9. The precision welding robot for automobile parts manufacturing according to claim 7, characterized in that: The transmission part (8) comprises a driving wheel (801) fixedly connected to the front of the second gear (506), a transmission belt (802) being transmission-connected to the middle of the driving wheel (801), a driven wheel (803) being transmission-connected to one side of the transmission belt (802), and the driven wheel (803) being fixedly connected to one end of the transmission shaft (707).

10. A precision welding robot for automobile parts manufacturing, characterized in that: The welding method includes the refined welding robot for automobile production according to any one of claims 1 to 9, comprising: The first step is to clamp the object to be welded on the top of the rotating frame (3) by clamping the workpiece (4), and weld one side of the object by the welding machine (2); In the second step, the toothed plate (508) is driven to move by the electric push rod (6), and the toothed plate (508) is driven to rotate the second gear (506), and the second gear (506) drives the driving wheel (801) and the half gear (510) to rotate; when the second gear (506) rotates to the front 180 degrees, the driving wheel (801), the transmission belt (802) and the driven wheel (803) cooperate to drive the transmission shaft (707) and the cam (710) to rotate, so that one end of the cam (710) is separated from the sliding block (704), and the sliding block (704) is driven by the first spring (709) to move toward the side of the first spring (709), thereby driving the limiting plate (702) to separate from the rotating frame (3) through the sliding block (704); In the third step, when the second gear (506) rotates to 180 to 360 degrees, the first gear (501) is driven to rotate by the cam (710), and the rotating frame (3) is driven to rotate by the first gear (501). When the rotation is close to 360 degrees, the cam (710) drives the limiting plate (702) to move to one side of the rotating frame (3), and the rotating rotating frame (3) pushes one of the limiting plates (702) to the side away from the rotating frame (3). When the rotating frame (3) rotates to fit with the other limiting plate (702), one of the limiting plates (702) is pushed by the second spring (711) to the side of the rotating frame (3) away from the other limiting plate (702), and the rotating frame (3) is clamped and fixed by the two limiting plates (702); The fourth step is to weld the other side of the object using a welding machine (2).

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