Connecting shaft welding robot workstation

Abstract

The connecting shaft welding robot workstation comprises a workstation body, a welding robot, a position changing machine, a connecting shaft, a hydraulic chuck, a pit and a safety device are arranged in the workstation body, the position changing machine comprises a first rotating shaft and a second rotating shaft, and a screw lifting device is further arranged on the lower portion of a rotating shaft shell of the position changing machine. The connecting shaft consists of a shaft, a flange and a rib plate; the other end of the connecting shaft is connected with the stirring shaft; the shaft and the flange are welded together through a positioner; the rib plate, the flange and the shaft are welded together through a rotating shaft of a welding robot. The welding connecting shaft of the welding robot workstation has the advantages of being efficient and stable. According to the connecting shaft welding robot workstation, a large amount of welding work can be completed in a short time, the welding quality is more stable, and the situation that the quality is unstable due to human factors is avoided, so that more efficient and stable welding work is achieved, and a wider development space is provided for industrial production.

Description

Technical Field

[0001] The utility model relates to the technical field of welding, in particular to a spindle welding robot workstation. Background Art

[0002] Welding is an essential key technology in the field of industrial manufacturing, and its application involves many industries. With the rise of China's aerospace, navigation, and automotive industries, welding technology has also developed towards automation and intelligence. Therefore, the demand for welding robots is increasing. Especially in the field of industrial automation, the rapid development of the industry has put forward higher requirements for welding quality and efficiency. Therefore, the economic benefits brought by automated welding have also become the driving force for the research of welding robots.

[0003] However, at present, it is still a difficult problem in the welding industry to replace manual labor with intelligent robots in spindle welding. When an intelligent robot welds a spindle, there are often problems such as being unable to find the best welding posture and position of the weld. Traditional manual welding has various drawbacks: due to the poor weldability of 45 steel or 40Cr steel, according to the spindle welding process, the whole spindle needs to be preheated in the furnace to 250°C before welding, and the holding time is not less than 0.5h to ensure that the spindle is fully preheated and prevent the formation of hardened martensite structure in the weld and the heat-affected zone, resulting in cold cracks; the length of some spindles reaches 3m. When welding the outer weld of the spindle, the welder needs to work at height and needs to do a good job in heat radiation prevention; the working environment is relatively harsh, the workers cannot work continuously, and the labor intensity is high. Therefore, the spindle welding robot workstation came into being, solving the problems of high labor intensity, poor working environment, and inability to guarantee welding quality in traditional welding. Content of the Utility Model

[0004] The purpose of the utility model is to design a spindle welding robot workstation in view of the deficiencies of the prior art, which can complete a large number of weldings in a short time, and the welding quality is more stable, which can greatly improve the welding quality. The specific technical solutions are as follows:

[0005] The spindle welding robot workstation includes a workstation. The interior of the workstation includes a welding robot, a positioner, a spindle, a hydraulic chuck, a pit, and a safety device. The positioner includes a first rotating shaft and a second rotating shaft. A screw lifting device is also provided at the lower part of the rotating shaft housing of the positioner; the spindle is composed of a shaft, a flange, and a rib plate; one end of the spindle is connected to the motor coupling, and the other end is connected to the stirring shaft; the shaft and the flange are welded together through the positioner; the rib plate and the flange and the shaft are welded together through the rotating shaft of the welding robot.

[0006] Preferably, when the second rotating shaft of the positioner rotates to the 0° state, the hydraulic chuck clamps the workpiece tightly; when the second rotating shaft of the positioner rotates to the 0° or 45° state, the first rotating shaft of the positioner rotates, and the welding shaft welds the outer side weld of the flange; when the second rotating shaft of the positioner rotates to the 135° state, the first rotating shaft of the positioner rotates, and the welding shaft welds the inner side weld of the flange.

[0007] Preferably, when the rotating shaft of the welding robot rotates to the 90° state, the welding rib plate welds the side welds of the flange and the shaft.

[0008] Preferably, the positioner is a hollow L-shaped double-shaft positioner, the hydraulic chuck is a three-jaw automatic welding hydraulic chuck, and the safety device is a fixed-length rear-top safety device.

[0009] Preferably, the screw lifting device adjusts the rear top of the connecting shaft within the hollow diameter range of the hydraulic chuck through an artificial adjusting handle, so as to realize the clamping and positioning fixation of one clamping and one top.

[0010] Preferably, the shaft is made of 45 steel or 40Cr steel, and the model of the flange is Q355B.

[0011] Preferably, the welding method of the welding robot is GMAW gas shielded metal arc welding, the shielding gas includes 80% Ar and 20% Co2, and the specification of the welding wire is a diameter of 1.2 mm.

[0012] Compared with the closest prior art, the technical solution provided by the present utility model has the following beneficial effects:

[0013] The advantage of the welding robot workstation for welding the connecting shaft of the present utility model lies in its high efficiency and stability; the connecting shaft welding robot workstation can complete a large amount of welding work in a short time, and the welding quality is more stable, and the quality will not be unstable due to human factors, so as to realize more efficient and stable welding work and provide a wider development space for industrial production; when using this welding robot workstation, workers only need to perform simple hoisting, and the working environment is greatly improved; the work efficiency is increased by 3 times, the qualified rate of ultrasonic flaw detection is increased from 80% to 98%, and the appearance of the weld is more beautiful. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of the workpiece in the vertical state of the connecting shaft welding robot workstation of the present utility model;

[0015] Figure 2 It is a schematic structural diagram of the second rotating shaft of the positioner of the present utility model rotating to the 135° state;

[0016] Figure 3 It is a schematic structural diagram of the connecting shaft of the present utility model;

[0017] Wherein: 1. Positioner; 2. Spindle; 3. Hydraulic chuck; 4. Pit; 5. Safety device; 6. Shaft; 7. Flange; 8. Rib plate; 9. Outer weld; 10. Inner weld; 11. Side weld. Specific embodiments

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] Please refer to Figure 1 - Figure 2 , the present invention provides a technical solution:

[0020] The spindle welding robot workstation includes a workstation, and the interior of the workstation includes a welding robot, a positioner 1, a spindle 2, a hydraulic chuck 3, a pit 4, and a safety device 5. The positioner 1 includes a first rotating shaft and a second rotating shaft. A screw lifting device is provided at the lower part of the rotary housing of the positioner 1, which is adjusted by a worker with a special adjusting handle, and can push the spindle 2 within the hollow diameter range of the hydraulic chuck 3 backward to achieve a clamping and positioning method similar to one clamping and one supporting. The spindle 2 is composed of a shaft 6, a flange 7, and a rib plate 8. One end of the spindle 2 is connected to the motor coupling, and the other end is connected to the stirring shaft; the shaft 6 and the flange 7 are welded together by the positioner 1; the rib plate 8 and the flange 7, the shaft 6 are welded together by the rotating shaft of the welding robot. The spindle 2 mainly transmits power and torque, and the force and torque it bears will affect the performance, life, and safety of the shaft. The shaft 6 is usually made of 45 steel or 40Cr steel, and the flange 7 is Q355B.

[0021] Further, when the second rotating shaft of the positioner 1 rotates to the 0° state, the hydraulic chuck 3 is clamped to the workpiece; when the second rotating shaft of the positioner 1 rotates to the 0° or 45° state, the first rotating shaft of the positioner 1 rotates to weld the outer weld 9 of the shaft 6 and the flange 7; when the second rotating shaft of the positioner 1 rotates to the 135° state, the first rotating shaft of the positioner 1 rotates to weld the inner weld 10 of the shaft 6 and the flange 7.

[0022] Further, when the rotating shaft of the welding robot rotates to the 90° state, the side weld 11 of the rib plate 8 and the flange 7, the shaft 6 is welded.

[0023] Further, the positioner 1 is a hollow L-shaped double-axis positioner. The spindle welding robot workstation is combined with the hollow L-shaped positioner, which can make the weld in the best welding posture and position, for example, it can achieve fillet welding in the flat position.

[0024] The hydraulic chuck 3 is a three-jaw automatic welding hydraulic chuck. At present, the weight of a single connecting shaft in the company reaches 3 tons, and rotation and displacement are required during welding, which requires a large clamping force and stability. The hydraulic chuck has a large clamping force and stable heavy cutting, and the three-jaw self-centering chuck can automatically center, eliminating the need to spend too much time on alignment.

[0025] The safety device 5 is a fixed-length rear-top safety device; the worker uses a special adjusting handle to adjust the screw lifting device to ensure that connecting shafts of the same specification are at the same welding position, facilitating the robot to find the position. It can also perform rear-top on the connecting shaft 2 within the hollow diameter range of the hydraulic chuck 3 for the workpiece, realizing a clamping and positioning method similar to one clamping and one supporting, enhancing the safety performance during the rotation of the connecting shaft.

[0026] Furthermore, the welding method of the welding robot is GMAW gas shielded metal arc welding. The shielding gas includes 80% Ar and 20% Co2, and the specification of the welding wire is 1.2 mm in diameter.

[0027] Furthermore, before welding, the welding robot must remove the burrs on the surface of the workpiece (including the welding workbench and jaws) that affect workpiece positioning. The positioner 1 is only used during welding displacement, and it is strictly prohibited to heat the workpiece on the positioner to avoid damaging the high-precision motor reducer.

[0028] The working process of the connecting shaft welding robot workstation of the present utility model is as follows: 1. Manually adjust the limit distance of the fixed-length rear-top safety device; 2. When the second rotating shaft of the positioner rotates to the 0° state (the workpiece is in the vertical state, as Figure 1 shown), after the worker completes loading the workpiece, the hydraulic chuck clamps the workpiece tightly. 3. When the second rotating shaft of the positioner rotates to the 0° or 45° state, the first shaft of the positioner rotates, and the welding shaft welds the outer side weld of the flange. 4. When the second rotating shaft of the positioner rotates to the 135° state (as Figure 2 shown), the first shaft of the positioner rotates, and the welding shaft welds the inner side weld of the flange. 5. Manually spot the rib plate, and when the rotating shaft of the robot rotates to the 90° state, weld the weld at the rib plate position.

[0029] The above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit it. Although the present utility model has been described in detail with reference to the above embodiments, those of ordinary skill in the art can still modify the specific implementation manners of the present utility model or make equivalent replacements. Any modifications or equivalent replacements that do not depart from the spirit and scope of the present utility model are within the scope of the claims of the present utility model pending approval.

Claims

1. A shaft welding robot workstation, including a workstation, characterized in that: The workstation includes a welding robot, a positioner, a connecting shaft, a hydraulic chuck, a pit, and a safety device. The positioner includes a first rotating shaft and a second rotating shaft. A screw lifting device is also provided at the lower part of the rotating shaft housing of the positioner; the connecting shaft is composed of a shaft, a flange, and a rib plate; one end of the connecting shaft is connected to the motor coupling, and the other end is connected to the stirring shaft; the shaft and the flange are welded together through the positioner; the rib plate, the flange, and the shaft are welded together through the rotating shaft of the welding robot.

2. The shaft-joint welding robot workstation according to claim 1, characterized in that: When the second rotating axis of the positioner rotates to the 0° state, the hydraulic chuck is clamped on the workpiece; when the second rotating axis of the positioner rotates to the 0° or 45° state, the first rotating axis of the positioner rotates to weld the outer weld between the welding shaft and the flange; when the second rotating axis of the positioner rotates to the 135° state, the first rotating axis of the positioner rotates to weld the inner weld between the welding shaft and the flange.

3. The shaft-joint welding robot workstation according to claim 1, characterized in that: When the rotating shaft of the welding robot rotates to a 90° state, the side welds of the rib plate, flange and shaft are welded.

4. The shaft-joint welding robot workstation according to claim 1, characterized in that: The positioner is a hollow L-shaped double-axis positioner, the hydraulic chuck is a three-jaw automatic welding hydraulic chuck, and the safety device is a fixed-length rear top safety device.

5. The shaft-joint welding robot workstation according to claim 1, characterized in that: The screw rod lifting device is adjusted by a manual adjustment handle to rear-pusher the connecting shaft within the hollow diameter range of the hydraulic chuck, thereby realizing one-clamp-one-pushing clamping, positioning and fixing.

6. The shaft-joint welding robot workstation according to claim 1, characterized in that: The shaft is made of 45 steel or 40Cr steel, and the model of the flange is Q355B.

7. The shaft-joint welding robot workstation according to claim 1, characterized in that: The welding method of the welding robot is GMAW gas shielded metal arc welding, the shielding gas includes 80% Ar and 20% Co2, and the specification of the welding wire is 1.2 mm in diameter.

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