Automatic welding device for forklift production

Abstract

The invention relates to an automatic welding device for forklift production, which is applied to the technical field of forklift production, and comprises a workbench, a welding mechanical arm and a test welding pre-inspection system, and the test welding pre-inspection system comprises a combined test inspection mechanism and a welding inspection comprehensive controller fixedly mounted on the workbench; the joint test detection mechanism comprises a test detection supporting box fixedly installed on the workbench, and through the arrangement of the test welding pre-detection system, the test welding pre-detection system can automatically control the welding mechanical arm to conduct test welding before formal welding is started so as to detect and judge whether the welding precision of the welding mechanical arm has a problem or not; if it is found that the welding precision of the welding mechanical arm is poor, formal welding cannot be started, an alarm can be given to related technicians, the technicians are prompted to correspondingly maintain the welding mechanical arm in time, the welding precision and welding quality of the welding device can be guaranteed, and the welding efficiency is improved. And the automation degree and the intelligence degree of the welding device are greatly improved.

Description

Technical Field

[0001] The invention relates to a welding device, in particular to an automatic welding device for forklift production, which is applied in the technical field of forklift production. Background Art

[0002] Forklifts are industrial handling vehicles, which refer to various wheeled handling vehicles for loading and unloading, stacking and short-distance transportation of palletized goods. In the production process of forklifts, welding is one of the key links. In the past, the welding work of forklifts mainly relied on manual operation, which had problems such as low welding efficiency, unstable welding quality and high labor intensity. With the development of automation technology, automated welding devices have gradually replaced traditional manual welding methods.

[0003] The invention patent with publication number CN117484057A discloses a forklift frame welding device, which belongs to the field of forklift frame welding, and includes a mechanical arm and a workbench for placing the mechanical arm, the mechanical arm slides on the workbench, a through slot is provided on the workbench, a placement frame for placing the frame is rotatably arranged in the through slot, a plurality of fixing mechanisms for fixing the frame are arranged on the placement frame; a driving assembly for driving the placement frame to rotate is arranged on the workbench. The application has the effect of reducing the work intensity of the staff and increasing the welding efficiency.

[0004] The welding robot arm is a common device with automatic welding function, which has been widely used in forklift production. However, with the use of the welding robot arm, its accuracy will inevitably have problems. Although the above welding device can reduce the work intensity of the staff and increase the welding efficiency, it cannot automatically detect the welding robot arm, resulting in the accuracy problem of the welding robot arm cannot be discovered in time. It is often necessary to conduct quality inspection after the welding is completed to find the problem, which will not only greatly affect the production progress, but also cause serious material waste. Therefore, we propose an automatic welding device for forklift production. Summary of the invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is: how to automatically detect the welding robot arm before starting formal welding to ensure the welding accuracy and welding quality of the welding device.

[0006] In order to solve the above problems, the present invention provides an automatic welding device for forklift production, comprising a workbench, a welding mechanical arm fixedly installed on the workbench and a test welding pre-inspection system, the test welding pre-inspection system comprising a joint test inspection mechanism and a welding inspection integrated controller fixedly installed on the workbench, the joint test inspection mechanism comprising a test inspection support box fixedly installed on the workbench, a lifting cylinder fixedly installed in the test inspection support box, a piston plate fixedly connected to the test inspection support box with a sliding seal at the output end of the lifting cylinder, a support plugging function plug connected to the test inspection support box with a sliding seal is provided on the top outer wall of the test inspection support box, a plurality of suction plate holes are provided on the top outer wall of the test inspection support box, the bottom end of the support plugging function plug is fixedly connected to a linkage frame arranged in a U shape, the top end of the piston plate is fixedly connected to a vertical sliding rod, the top end of the vertical sliding rod is fixedly connected to a linkage horizontal plate, the left and right sides of the linkage frame are fixedly connected to plugging elastic ropes, one end of the plugging elastic rope away from the linkage frame is fixedly connected to the inner wall of the test inspection support box, and an air pressure sensor fixedly installed on the inner wall of the test inspection support box is provided above the piston plate;

[0007] The joint test inspection mechanism also includes a test welding plate and a test welding block. The test welding plate is provided with a test welding hole, and the test welding block matches the test welding hole. The welding inspection integrated controller is provided with a welding setting module, a welding control module, an audible and visual alarm module, and a control button. The welding setting module and the control button are all signal-connected with the welding control module. The welding control module is signal-connected with the audible and visual alarm module, the welding robot arm, the lifting cylinder, and the air pressure sensor.

[0008] In the above-mentioned automated welding device for forklift production, before starting formal welding, the trial welding pre-inspection system will automatically control the welding robot arm to perform trial welding to detect and determine whether there are any problems with the welding accuracy of the welding robot arm. If problems are found in the welding accuracy of the welding robot arm, not only will formal welding not begin, but an alarm will also be issued to relevant technical personnel.

[0009] As a further improvement of the present application, the top of the supporting and blocking functional plug is flush with the top of the test support box, the size of the cross-section of the top of the supporting and blocking functional plug is larger than the size of the cross-section of the test welding hole, and multiple suction plate holes are evenly distributed in a ring shape on the outside of the supporting and blocking functional plug.

[0010] As a further improvement of the present application, the method of using the test welding pre-inspection system is as follows: the test welding welding path and test welding welding parameters as well as the positive welding welding path and positive welding welding parameters are reasonably set through the welding setting module, the test welding plate is placed on the top of the test inspection support box so that the test welding hole is aligned with the support plug and the test welding plate covers all the suction plate holes, the test welding block is inserted into the inner side of the test welding hole, and the welding instruction is issued to the welding control module through the control button, the welding control module controls the lifting cylinder to drive the piston plate to move downward for the first time, resulting in a negative pressure state above the piston plate, the welding control module controls the welding robot arm to perform test welding on the test welding plate and the test welding block according to the preset test welding welding path and test welding parameters, and after the welding is completed, the welding control module controls the lifting cylinder to drive the piston plate to move downward for the first time, resulting in a negative pressure state above the piston plate, and the welding control module controls the welding robot arm to perform test welding on the test welding plate and the test welding block according to the preset test welding welding path and test welding parameters. The lowering cylinder drives the piston plate to move downward for a second time until the supporting plug is separated from the top inner wall of the test support box and completely enters the interior of the test support box. The welding control module starts the air pressure sensor to enable the air pressure sensor to monitor the air pressure in the area above the piston plate and obtain the air pressure data monitored by the air pressure sensor. The welding control module determines whether there is a problem with the welding accuracy of the welding robot arm by analyzing the air pressure data. When the judgment result is that there is no problem with the welding accuracy of the welding robot arm, the welding control module controls the welding robot arm to perform formal welding of the forklift parts to be welded according to the preset positive welding path and positive welding parameters. When the judgment result is that there is a problem with the welding accuracy of the welding robot arm, the welding control module starts the sound and light alarm module to give an alarm.

[0011] As a further improvement of the present application, ventilation holes are provided on the outer walls on both sides of the left and right sides of the test support box, and the ventilation holes are located below the piston plate, which is conducive to the up and down movement of the piston plate. The joint test mechanism also includes a plate storage box and a block storage box fixedly installed on the outer wall of the test support box. There are multiple test welding plates and test welding blocks, and multiple test welding plates are stacked up and down in the plate storage box, and multiple test welding blocks are stacked up and down in the block storage box, which is convenient for relevant staff to take the test welding plates and test welding blocks.

[0012] As another improvement of the present application, the combined test mechanism also includes two reinforcement and inspection-aiding components, which include a guide cylinder fixedly mounted on the top of the piston plate, a reinforcement spring fixedly mounted on the piston plate is provided on the inner side of the guide cylinder, the top of the reinforcement spring is fixedly connected to a guide force transmission block matching the guide cylinder, the top of the guide force transmission block is fixedly connected to a force transmission rod, and the top of the force transmission rod is fixedly connected to the supporting and blocking function plug.

[0013] As another improved supplement of the present application, the reinforcement and inspection-assisting assembly is arranged between the supporting and blocking functional plug and the piston plate, and the two reinforcement and inspection-assisting assemblies are respectively located on the left and right sides of the linkage frame, the reinforcement spring is in a compressed state, and the compressed length of the reinforcement spring is greater than the distance moved by the welding control module when the lifting cylinder drives the piston plate to move downward for the first time. The reinforcement and inspection-assisting assembly can not only play a fixing role that can be automatically adjusted for the supporting and blocking functional plug, but also play a guiding role.

[0014] As another improvement supplement to the present application, the vertical cross-section of the supporting and blocking functional plug is set to be small at the top and large at the bottom, which can jam the supporting and blocking functional plug to prevent it from extending out of the test support box. A suction block hole is opened in the middle of the supporting and blocking functional plug to prevent the test welding block from moving during the welding process.

[0015] As another improved supplement to the present application, the test welding pre-inspection system also includes a material moving robot arm with a suction cup assembly, which is used to grab and move the test welding plates and test welding blocks. The welding inspection integrated controller is also provided with a judgment and control-shift module with a timing function, which is used to judge whether it is necessary to inspect the welding robot arm and control the material moving robot arm to grab and move the test welding plates and test welding blocks. The welding setting module and the welding control module are both connected to the judgment and control-shift module signal, and the judgment and control-shift module is connected to the material moving robot arm signal, so that the test welding pre-inspection system can automatically judge whether it is necessary to inspect the welding robot arm, and can automatically complete the inspection of the welding robot arm.

[0016] To summarize, the present application sets up a trial welding pre-inspection system so that before starting formal welding, the trial welding pre-inspection system will automatically control the welding robot arm to perform trial welding to detect and determine whether there is a problem with the welding accuracy of the welding robot arm. If a problem is found in the welding accuracy of the welding robot arm, not only will formal welding not begin, but an alarm will also be issued to the relevant technical personnel, prompting the technical personnel to perform corresponding maintenance on the welding robot arm in a timely manner, which not only ensures the welding accuracy and welding quality of the welding device, but also greatly improves the automation and intelligence of the welding device; by setting up the reinforcement auxiliary inspection component, the reinforcement auxiliary inspection component can not only play a role in the support and blocking function, but also play a role in the support and blocking function. The fixing function that can be automatically adjusted can prevent the supporting and blocking function plug from moving before the test welding is completed. It can also play a guiding role to prevent the supporting and blocking function plug from shifting, thereby improving the reliability and practicality of the test welding pre-inspection system, and thus improving the reliability and practicality of the welding device. Through the joint setting of the material moving robot arm, the judgment and test control module, etc., the test welding pre-inspection system can automatically determine whether the welding robot arm needs to be inspected, and can automatically complete the inspection of the welding robot arm, without the need for manual picking and placing of the test welding plates and test welding blocks, further improving the automation and intelligence of the welding device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of an automated welding device for forklift production in the first embodiment of the present application;

[0018] Figure 2 This is a schematic diagram of the three-dimensional structure of the joint testing mechanism in the first embodiment of the present application;

[0019] Figure 3 This is a schematic cross-sectional view of the test support box in the first embodiment of the present application;

[0020] Figure 4 This is a system structure block diagram of the welding inspection integrated controller in the first embodiment of the present application;

[0021] Figure 5 This is a pictographic demonstration diagram of test welding in the first embodiment of the present application;

[0022] Figure 6 This is a schematic cross-sectional view of the test support box in the second embodiment of the present application;

[0023] Figure 7 This is a schematic cross-sectional view of the guide cylinder in the second embodiment of the present application;

[0024] Figure 8 This is a system structure block diagram of the welding inspection integrated controller in the second embodiment of the present application.

[0025] Description of the numbers in the figure:

[0026] 101. Workbench; 102. Welding robot arm; 201. Test support box; 202. Lifting cylinder; 203. Piston plate; 204. Support plug; 205. Plate suction hole; 206. Linkage frame; 207. Vertical slide bar; 208. Linkage horizontal plate; 209. Elastic plug rope; 210. Test welding plate; 211. Test welding block; 212. Test welding hole; 213. Plate storage box; 214. Block storage box; 215. Vent; 216. Air pressure sensor; 217. Block suction hole; 003. Welding inspection integrated controller; 401. Guide cylinder; 402. Reinforcement spring; 403. Guide force transmission block; 404. Force transmission rod. DETAILED DESCRIPTION

[0027] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0028] The first implementation method:

[0029] Figure 1-Figure 5The invention shows an automatic welding device for forklift production, including a workbench 101, a welding robot arm 102 fixedly mounted on the workbench 101, and a test welding pre-inspection system (the welding robot arm 102 is a mature prior art, and its specific structure is not described here). The test welding pre-inspection system includes a joint test inspection mechanism and a welding inspection integrated controller 003 fixedly mounted on the workbench 101. The joint test inspection mechanism includes a test inspection support box 201 fixedly mounted on the workbench 101. A lifting cylinder 202 is fixedly mounted in the test inspection support box 201. The output end of the lifting cylinder 202 is fixedly connected to The piston plate 203 is slidably and sealably connected to the test support box 201. The top outer wall of the test support box 201 is penetrated with a supporting plug 204 which is slidably and sealably connected thereto. The top of the supporting plug 204 is flush with the top of the test support box 201. A plurality of suction plate holes 205 are provided on the top outer wall of the test support box 201. The plurality of suction plate holes 205 are evenly distributed along a ring on the outside of the supporting plug 204. The bottom end of the supporting plug 204 is fixedly connected with a U-shaped linkage frame 206. The top of the piston plate 203 is fixedly connected with a vertical sliding rod 207. The top of the slide bar 207 is fixedly connected with a linkage horizontal plate 208, and the left and right sides of the linkage frame 206 are fixedly connected with a plug elastic rope 209, and the end of the plug elastic rope 209 away from the linkage frame 206 is fixedly connected to the inner wall of the test support box 201, and an air pressure sensor 216 fixedly installed on the inner wall of the test support box 201 is arranged above the piston plate 203. The joint test mechanism also includes a test welding plate 210 and a test welding block 211. The test welding plate 210 is provided with a test welding hole 212, and the test welding block 211 matches the test welding hole 212. The top of the plugging function plug 204 The size of the end cross section is larger than that of the cross section of the test welding hole 212. The shape and size of the test welding block 211 and the test welding hole 212 as well as the material of the test welding plate 210 and the test welding block 211 can be flexibly adjusted by technical personnel in this field according to actual conditions. The welding inspection integrated controller 003 is provided with a welding setting module, a welding control module, an sound and light alarm module, and a control button. The welding setting module and the control button are all connected to the welding control module by signal. The welding control module is connected to the sound and light alarm module, the welding robot arm 102, the lifting cylinder 202, and the air pressure sensor 216 by signal.

[0030] See also Figure 1-Figure 5, according to the shape, size, material and other related parameters of the test welding plate 210 and the test welding block 211, the test welding path and test welding parameters are reasonably set through the welding setting module, according to the shape, size, material and other related parameters of the forklift parts to be welded, the positive welding path and positive welding parameters are reasonably set through the welding setting module, the test welding plate 210 is placed on the top of the test support box 201, the test welding hole 212 is aligned with the support plug 204, and the test welding plate 210 covers all the suction plate holes 205, the test welding block 211 is inserted into the inner side of the test welding hole 212, and the welding command is issued to the welding control module through the control button. After receiving the command, the welding control module will first control the lifting cylinder 202 to drive the piston plate 203 to move downward for the first time (the first The downward movement distance can be set by technicians in this field through the welding setting module according to actual conditions), causing the upper part of the piston plate 203 to be in a negative pressure state, so that the test welding plate 210 is fixed by the suction generated by the negative pressure (the elastic rope 209 can fix the supporting function plug 204 and the linkage frame 206, and because the suction generated by the negative pressure at this time is relatively small, the supporting function plug 204 can remain stationary at this time). Then, the welding control module will control the welding robot 102 to perform test welding on the test welding plate 210 and the test welding block 211 according to the preset test welding welding path and test welding parameters to detect whether there is a problem with the welding accuracy of the welding robot 102. After the welding is completed, the welding control module will control the lifting and lowering of the welding robot 102. The lowering cylinder 202 drives the piston plate 203 to move downward for a second time until the blocking function plug 204 is separated from the top inner wall of the test support box 201 and completely enters the interior of the test support box 201 (as the piston plate 203 moves downward, the vertical slide bar 207 and the linkage horizontal plate 208 will also move downward together. After the linkage horizontal plate 208 abuts against the linkage frame 206, the piston plate 203 continues to move downward and will pull the blocking function plug 204 downward through the vertical slide bar 207, the linkage horizontal plate 208, and the linkage frame 206, causing the blocking function plug 204 to move downward. In addition, the distance of the second downward movement can also be set by a technician in this field through the welding setting module according to actual conditions). Then the welding control module will start the air pressure sensor 216. The air pressure sensor 216 monitors the air pressure in the area above the piston plate 203 and obtains the air pressure data monitored by the air pressure sensor 216. Then, the welding control module detects the welding quality of the welding robot arm 102 by analyzing the air pressure data, and then determines whether there is a problem with the welding accuracy of the welding robot arm 102. At this time (after the blocking function plug 204 completely enters the interior of the test support box 201), under the action of the suction force generated by the negative pressure, the test welding block 211 will be subjected to a downward force, and because the piston plate 203 moves downward a certain distance, the suction force generated by the negative pressure will be significantly increased. If there is no problem with the welding accuracy of the welding robot arm 102, then the welding point between the test welding block 211 and the test welding plate 210 will have a better sealing property.Air cannot enter the test support box 201 through the welding joint, and the test welding block 211 will not loosen under the action of suction, causing air to enter the test support box 201 through the welding joint. Therefore, the air pressure data monitored by the air pressure sensor 216 will be relatively stable. On the contrary, if there is a problem with the welding accuracy of the welding robot 102, it may cause defects in the sealing of the welding joint between the test welding block 211 and the test welding plate 210, so that air will enter the test support box 201 through the welding joint, and it may also cause the test welding block 211 and the test welding plate 210 to be welded. The welding strength between the welding robot 102 and the welding robot 102 is insufficient, which causes the test welding block 211 to loosen under the action of suction, thereby causing air to enter the test support box 201 through the welding position. Therefore, the air pressure data monitored by the air pressure sensor 216 will change significantly. Therefore, the welding control module can determine whether there is a problem with the welding accuracy of the welding robot 102 by analyzing the air pressure data monitored by the air pressure sensor 216. When the judgment result is that there is no problem with the welding accuracy of the welding robot 102, the welding control module will control the welding robot 102 to According to the preset positive welding path and positive welding parameters, the forklift parts to be welded are formally welded. At the same time, the welding control module will turn off the air pressure sensor 216 and control the lifting cylinder 202 to drive the piston plate 203 to move upward and reset. When the judgment result is that there is a problem with the welding accuracy of the welding robot arm 102, the welding control module will start the sound and light warning module to warn the relevant technical personnel. At the same time, the welding control module will also turn off the air pressure sensor 216 and control the lifting cylinder 202 to drive the piston plate 203 to move upward and reset. Therefore, through the setting of the trial welding pre-inspection system, before starting the formal welding, the trial welding pre-inspection system will automatically control the welding robot arm 102 to perform test welding to detect and judge whether there is a problem with the welding accuracy of the welding robot arm 102. If it is found that there is a problem with the welding accuracy of the welding robot arm 102, not only will the formal welding not be started, but also a warning will be issued to the relevant technical personnel, prompting the technical personnel to perform corresponding maintenance on the welding robot arm 102 in time, which can not only ensure the welding accuracy and welding quality of the welding device, but also greatly improve the automation and intelligence of the welding device.

[0031] See also Figure 2 and Figure 3 The outer walls on both sides of the test support box 201 are provided with ventilation holes 215, and the ventilation holes 215 are located below the piston plate 203, which is conducive to the up and down movement of the piston plate 203. The joint test mechanism also includes a plate storage box 213 and a block storage box 214 fixedly installed on the outer wall of the test support box 201. There are multiple test welding plates 210 and test welding blocks 211, and multiple test welding plates 210 are stacked up and down in the plate storage box 213, and multiple test welding blocks 211 are stacked up and down in the block storage box 214, which is convenient for relevant staff to take the test welding plates 210 and test welding blocks 211.

[0032] The second implementation method:

[0033] See also Figure 6-Figure 8 Different from the first embodiment, the combined inspection mechanism also includes two reinforcement and inspection-aiding components, which include a guide cylinder 401 fixedly mounted on the top of the piston plate 203, a reinforcement spring 402 fixedly mounted on the piston plate 203 is arranged on the inner side of the guide cylinder 401, the top of the reinforcement spring 402 is fixedly connected with a guide force transmission block 403 matching the guide cylinder 401, the top of the guide force transmission block 403 is fixedly connected with a force transmission rod 404, the top of the force transmission rod 404 is fixedly connected with the supporting and blocking function plug 204, the reinforcement and inspection-aiding component is arranged between the supporting and blocking function plug 204 and the piston plate 203, and the two reinforcement and inspection-aiding components are respectively located on the left and right sides of the linkage frame 206, the reinforcement spring 402 is in a compressed state, and the compressed length of the reinforcement spring 402 is greater than the distance moved when the welding control module controls the lifting cylinder 202 to drive the piston plate 203 to move downward for the first time.

[0034] When the welding control module controls the lifting cylinder 202 to drive the piston plate 203 to move downward for the first time, the reinforcement spring 402 will rebound to a certain extent, but because its compressed length is greater than the moving distance, after completing the first downward movement, the reinforcement spring 402 is still in a compressed state. The compressed reinforcement spring 402 can apply an upward force to the supporting and blocking function plug 204 through the guide force transmission block 403 and the force transmission rod 404, thereby further fixing the supporting and blocking function plug 204 to prevent the supporting and blocking function plug 204 from moving before the trial welding is completed. In addition, The guide cylinder 401, the guide force transmission block 403, and the force transmission rod 404 can also play a guiding role to prevent the supporting and blocking function plug 204 from shifting during the up and down movement. Therefore, through the setting of the reinforcement auxiliary inspection component, the reinforcement auxiliary inspection component can not only play a fixing role that can be automatically adjusted for the supporting and blocking function plug 204 to prevent the supporting and blocking function plug 204 from moving before the trial welding is completed, but also play a guiding role to prevent the supporting and blocking function plug 204 from shifting, thereby improving the reliability and practicality of the trial welding pre-inspection system, and further improving the reliability and practicality of the welding device.

[0035] See also Figure 6The vertical section of the supporting and blocking function plug 204 is set to be small at the top and large at the bottom, which can jam the supporting and blocking function plug 204 and prevent the supporting and blocking function plug 204 from extending out of the test support box 201. A suction block hole 217 is opened in the middle of the supporting and blocking function plug 204. After the welding control module controls the lifting cylinder 202 to drive the piston plate 203 to move downward for the first time, the suction force generated by the negative pressure can act on the test welding block 211 through the suction block hole 217, thereby fixing the test welding block 211 and preventing the test welding block 211 from moving during the welding process.

[0036] See also Figure 8 The test welding pre-inspection system also includes a material transfer robot with a suction cup assembly (the material transfer robot with a suction cup assembly is a mature existing technology, and its specific structure is not described here), which is used to grab and move the test welding plate 210 and the test welding block 211. The welding inspection integrated controller 003 is also provided with a judgment and control module with a timing function, which is used to judge whether it is necessary to inspect the welding robot 102 and control the material transfer robot to grab and move the test welding plate 210 and the test welding block 211. The welding setting module and the welding control module are both connected to the judgment and control module signal, and the judgment and control module is connected to the material transfer robot signal.

[0037] A time parameter is reasonably set through the welding setting module. Each time the welding control module starts the welding robot arm 102 to start welding, it will send a start timing signal to the judgment and test control and shift module to make the judgment and test control and shift module start timing. Each time the welding control module closes the welding robot arm 102 to end welding, it will send a stop timing signal to the judgment and test control and shift module to make the judgment and test control and shift module stop timing. The judgment and test control and shift module will accumulate the duration of each timing (that is: the judgment and test control and shift module will continue timing based on the last timing after receiving the start timing signal next time). When a welding instruction is issued to the welding control module through the control button, the welding control module will first send a signal to the judgment and test control and shift module after receiving the instruction. , so that the judgment and test control and shift module determines whether it is necessary to inspect the workbench 101. The specific judgment process is: the judgment and test control and shift module compares the accumulated timing time with the time parameter. If the timing time is greater than the time parameter, it is determined that inspection is required. If the timing time is less than the time parameter, it is determined that inspection is not required. When the judgment result is that inspection is required, the judgment and test control and shift module will clear the timing time (because the timing time will be cleared each time the judgment result is that inspection is required, the accumulated timing time when the judgment and test control and shift module judges whether inspection is required is equivalent to the accumulated working time since the last inspection of the workbench 101), and controls the material transfer robot arm to grab a test weld from the plate storage box 213 The plate 210 is moved to the top of the test support box 201, and then the judgment and test control and movement module will control the material moving robot arm to grab a test welding block 211 from the block storage box 214 and insert it into the inner side of the test welding hole 212 (the test welding hole 212 here refers to the test welding hole 212 on the test welding plate 210 that was moved to the top of the test support box 201 before), and then the judgment and test control and movement module will send a signal to start detection to the welding control module, so that the welding control module will execute the control of the lifting cylinder 202 to drive the piston plate 203 to move downward for the first time, so as to detect the welding robot arm 102, and after the detection is completed, the welding control module will send a signal to the judgment and test control and movement module so that the judgment and test control and movement module The material transfer robot arm is controlled to transfer the test welding plate 210 and the test welding block 211 after welding. When the judgment result is that no detection is needed, the judgment and test control and transfer module will send a signal to the welding control module to start formal welding, so that the welding control module directly controls the welding robot arm 102 according to the preset positive welding path and positive welding parameters. Therefore, through the joint setting of the material transfer robot arm, the judgment and test control and transfer module, etc., the test welding pre-inspection system can automatically determine whether it is necessary to detect the welding robot arm 102, and can automatically complete the detection of the welding robot arm 102, without the need for manual picking up and placing the test welding plate 210 and the test welding block 211, further improving the automation and intelligence of the welding device.

[0038] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. An automated welding device for forklift production, comprising a workbench (101) and a welding robot arm (102) fixedly mounted on the workbench (101), characterized in that: The invention also comprises a test welding pre-inspection system, the test welding pre-inspection system comprising a combined test inspection mechanism and a welding inspection integrated controller (003) fixedly mounted on a workbench (101), the combined test inspection mechanism comprising a test inspection support box (201) fixedly mounted on the workbench (101), a lifting cylinder (202) fixedly mounted in the test inspection support box (201), an output end of the lifting cylinder (202) fixedly connected to a piston plate (203) slidably and sealably connected to the test inspection support box (201), a support plug (204) slidably and sealably connected to the test inspection support box (201) is provided through the top outer wall of the test inspection support box (201), and a support plug (204) slidably and sealably connected to the test inspection support box (201) is provided on the top outer wall of the test inspection support box (201). A plurality of suction plate holes (205) are provided, the bottom end of the supporting and blocking functional plug (204) is fixedly connected to a linkage frame (206) arranged in a U shape, the top end of the piston plate (203) is fixedly connected to a vertical sliding rod (207), the top end of the vertical sliding rod (207) is fixedly connected to a linkage horizontal plate (208), the left and right sides of the linkage frame (206) are fixedly connected to plugging elastic ropes (209), one end of the plugging elastic rope (209) away from the linkage frame (206) is fixedly connected to the inner wall of the test support box (201), and an air pressure sensor (216) fixedly installed on the inner wall of the test support box (201) is provided above the piston plate (203); The combined test inspection mechanism further comprises a test welding plate (210) and a test welding block (211); the test welding plate (210) is provided with a test welding hole (212); the test welding block (211) matches the test welding hole (212); the welding inspection integrated controller (003) is provided with a welding setting module, a welding control module, an audible and visual warning module, and a control button; the welding setting module and the control button are both signal-connected to the welding control module; the welding control module is signal-connected to the audible and visual warning module, the welding robot arm (102), the lifting cylinder (202), and the air pressure sensor (216).

2. The automatic welding device for forklift production according to claim 1, characterized in that: The top end of the supporting and blocking functional plug (204) is flush with the top end of the test support box (201), the size of the cross section of the top end of the supporting and blocking functional plug (204) is larger than the size of the cross section of the test welding hole (212), and the plurality of suction plate holes (205) are evenly distributed along a ring shape on the outside of the supporting and blocking functional plug (204).

3. The automatic welding device for forklift production according to claim 1, characterized in that: The method for using the test welding pre-inspection system is as follows: the test welding path and test welding parameters as well as the positive welding path and positive welding parameters are reasonably set through the welding setting module, the test welding plate (210) is placed on the top of the test inspection support box (201) so that the test welding hole (212) is aligned with the support plug (204) and the test welding plate (210) covers all the suction plate holes (205), the test welding block (211) is inserted into the inner side of the test welding hole (212), a welding instruction is issued to the welding control module through the control button, the welding control module controls the lifting cylinder (202) to drive the piston plate (203) to move downward for the first time, so that the upper part of the piston plate (203) is in a negative pressure state, the welding control module controls the welding robot arm (102) to perform test welding on the test welding plate (210) and the test welding block (211) according to the preset test welding path and test welding parameters, and after the welding is completed ... and the welding control module controls the welding robot arm (102) to perform test welding on the test welding plate (210) and the test welding block (211). The cylinder (202) drives the piston plate (203) to move downward for a second time until the supporting plug (204) is separated from the top inner wall of the test support box (201) and completely enters the interior of the test support box (201). The welding control module starts the air pressure sensor (216) so that the air pressure sensor (216) monitors the air pressure in the area above the piston plate (203) and obtains the air pressure data monitored by the air pressure sensor (216). The welding control module determines whether there is a problem with the welding accuracy of the welding robot arm (102) by analyzing the air pressure data. When the judgment result shows that there is no problem with the welding accuracy of the welding robot arm (102), the welding control module controls the welding robot arm (102) to perform formal welding on the forklift component to be welded according to the preset positive welding path and positive welding parameters. When the judgment result shows that there is a problem with the welding accuracy of the welding robot arm (102), the welding control module starts the sound and light warning module to issue a warning.

4. The automatic welding device for forklift production according to claim 3, characterized in that: The outer walls on both sides of the test support box (201) are provided with ventilation holes (215), and the ventilation holes (215) are located below the piston plate (203). The combined test mechanism also includes a plate storage box (213) and a block storage box (214) fixedly mounted on the outer wall of the test support box (201). A plurality of the test welding plates (210) and the test welding blocks (211) are provided, and a plurality of the test welding plates (210) are stacked up and down in the plate storage box (213), and a plurality of the test welding blocks (211) are stacked up and down in the block storage box (214).

5. The automatic welding device for forklift production according to claim 4, characterized in that: The combined inspection mechanism also includes two reinforcement and inspection-aiding components, the reinforcement and inspection-aiding components including a guide cylinder (401) fixedly mounted on the top of the piston plate (203), a reinforcement spring (402) fixedly mounted on the piston plate (203) being arranged on the inner side of the guide cylinder (401), the top of the reinforcement spring (402) being fixedly connected to a guide force transmission block (403) matching the guide cylinder (401), the top of the guide force transmission block (403) being fixedly connected to a force transmission rod (404), the top of the force transmission rod (404) being fixedly connected to the supporting and blocking functional plug (204).

6. The automatic welding device for forklift production according to claim 5, characterized in that: The reinforcement and inspection-assisting assembly is arranged between the supporting and blocking functional plug (204) and the piston plate (203), and the two reinforcement and inspection-assisting assemblies are respectively located on the left and right sides of the linkage frame (206), and the reinforcement spring (402) is in a compressed state.

7. The automatic welding device for forklift production according to claim 6, characterized in that: The compressed length of the reinforcing spring (402) is greater than the distance moved when the welding control module controls the lifting cylinder (202) to drive the piston plate (203) to move downward for the first time. The vertical cross-section of the supporting and blocking functional plug (204) is set to be small at the top and large at the bottom, and a suction block hole (217) is opened in the middle of the supporting and blocking functional plug (204).

8. The automatic welding device for forklift production according to claim 1, characterized in that: The test welding pre-inspection system also includes a material transfer robot arm with a suction cup assembly, which is used to grab and move the test welding plate (210) and the test welding block (211). The welding inspection integrated controller (003) is also provided with a judgment and control module with a timing function, which is used to judge whether it is necessary to inspect the welding robot arm (102) and control the material transfer robot arm to grab and move the test welding plate (210) and the test welding block (211). The welding setting module and the welding control module are both connected to the judgment and control module signal, and the judgment and control module is connected to the material transfer robot arm signal.

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