Automatic detection device for missing welding of welding stud on battery box bottom plate

Abstract

The utility model discloses an automatic detection device for missing welding of a welding stud on a bottom plate of a battery box. The device comprises a supporting seat, a plurality of sensor assemblies which are vertically arranged on the supporting seat and are used for detecting whether studs are welded on a battery box bottom plate or not, and a gripper which is used for gripping the battery box bottom plate and enabling one side, provided with the studs, of the battery box bottom plate to face the sensor assemblies, the sensor assembly comprises a mounting plate which is vertically fixed on the supporting seat, and a plurality of sensors which are mounted on the surface of one side of the mounting plate and are used for acquiring signals of studs on the bottom plate of the battery box. The automatic detection device for missing welding of the welding stud is suitable for mass detection production, improves the efficiency of missing welding detection of the stud, and is high in detection precision, strong in adaptability and high in flexibility.

Description

Technical Field

[0001] The utility model belongs to the technical field of leak welding detection, and particularly relates to an automatic detection device for detecting the leak welding of welding studs on the bottom plate of a battery box.

Background Art

[0002] A large number of studs need to be welded on the bottom plate of the battery box. Due to impurities or oil stains on the bottom plate of the battery box, it is difficult to avoid leak welding during the welding process. Once leak welding occurs, an operator needs to enter the welding station for confirmation. In automated production, the welding station is an automatic welding station for robots. Repairing each point wastes several minutes, which will cause the entire area to stop running and even lead to the shutdown of the entire production line. Leak welding is extremely likely to cause defective equipment products, and each confirmation wastes a large amount of manpower and material resources. In addition, even if the operator enters the welding station, it cannot guarantee no leak welding.

[0003] In the prior art, a variety of detection devices for stud welding leak welding have been designed. For example, the leak welding detection device and the stud welding gun and leak welding follow-up tracking system using the same disclosed in the patent publication number CN203592218U. The stud welding gun includes a gun body and a gun head. The leak welding detection device includes a linear driving device and a sensor. The linear driving device is connected to the gun body and includes an extendable and retractable output end. The sensor is used to detect whether a stud exists and is directly or indirectly connected to the output end. The sensor can extend when leak welding needs to be detected and retract after the detection is completed. It can be seen from the design of this solution that this leak welding detection device is suitable for the leak welding inspection of the bottom plate of a small batch of battery boxes. For the leak welding inspection of a large batch, obviously this solution has the problems of low detection efficiency and slow production rhythm.

[0004] Therefore, it is necessary to provide an automatic detection device for detecting the leak welding of welding studs on the bottom plate of a battery box to solve the above technical problems.

Content of the Utility Model

[0005] The main purpose of the utility model is to provide an automatic detection device for detecting the leak welding of welding studs on the bottom plate of a battery box, which is suitable for large-scale detection production, not only improves the detection efficiency of stud leak welding, but also has high detection accuracy, strong adaptability and high flexibility.

[0006] The utility model realizes the above purpose through the following technical scheme: an automatic detection device for detecting the leak welding of welding studs on the bottom plate of a battery box, which includes a support seat, a plurality of sensor components vertically arranged on the support seat and used to detect whether there are welding studs on the bottom plate of the battery box, and a gripper used to grab the bottom plate of the battery box and make the side with studs on the bottom plate of the battery box face the sensor components. The sensor component includes a mounting plate vertically fixed on the support seat and a plurality of sensors mounted on one side surface of the mounting plate and used for signal acquisition of the studs on the bottom plate of the battery box.

[0007] Further, the support base includes columns arranged on both sides and a cross beam fixed between the middle and lower sections of the two columns. A plurality of the sensor assemblies are all installed at the upper ends of the columns. An avoidance opening for the gripper to pass through is formed above the cross beam between the two columns.

[0008] Further, a plurality of limit plates are installed on the cross beam, and positioning holes are formed in the limit plates.

[0009] Further, a plurality of brackets are installed on the surface of the mounting plate, and the sensors are installed on the brackets through bolts.

[0010] Further, the gripper includes jaws on the sides for gripping the bottom plate of the battery box and guide rods arranged below the jaws and extending into the positioning holes. The gripper passes through between the avoidance openings to position the guide rods into the positioning holes, thereby realizing the positioning between the gripper and the support base.

[0011] Compared with the prior art, the beneficial effects of the automatic detection device for missing welding of stud welding on the bottom plate of a battery box of the present utility model are as follows: (1) The sensor assemblies are provided with sensors corresponding one by one to the numbers of a plurality of studs on the bottom plate of the battery box. The sensor assemblies will communicate with an external PLC system to judge whether there is missing welding of studs. If there is a situation of missing welding of studs, the PLC system screen will also give an alarm prompt of the corresponding missing welding number of studs. This kind of automatic detection device for missing welding is suitable for mass production on the production line, with high production efficiency and high detection accuracy; (2) The sensors on the sensor assemblies are fixed by bolts. When facing different bottom plates of battery boxes or different positions of studs on the bottom plate of the battery box, the position and angle of the sensors can be adjusted according to the actual situation to adapt to the bottom plate of the battery box, which can be adapted to different bottom plates of battery boxes, with strong adaptability and high flexibility; (3) When the sensor assemblies are detecting, the gripper passes through the avoidance opening between the two columns of the support base, so that the guide rods of the gripper extend into the positioning holes of the support base to realize the precise positioning between the gripper and the support base. Even if the studs on the bottom plate of the battery box are very small, it can ensure that the sensors can be precisely positioned on the studs, ensuring the accuracy of detection. Therefore, the automatic detection device for missing welding provided by this solution is suitable for mass detection production, not only improving the efficiency of stud missing welding detection, but also having high detection accuracy, strong adaptability and high flexibility.

Description of the Drawings

[0012] Figure 1 It is a three-dimensional structural schematic diagram when the automatic detection device for missing welding of the embodiment of the present utility model detects the bottom plate of the battery box;

[0013] Figure 2Schematic front view structure diagram of the automatic detection device for missed welding in the embodiment of the present utility model;

[0014] Figure 3 Schematic structure diagram of the jaw and guide rod at the end of the gripper in the embodiment of the present utility model;

[0015] Figure 4 Schematic three-dimensional structure diagram of the bottom plate of the battery box in the embodiment of the present utility model;

[0016] The numbers in the figure represent:

[0017] 100 - Automatic detection device for missed welding, 200 - Bottom plate of the battery box, 201 - Stud;

[0018] 1 - Support base, 11 - Column, 12 - Cross beam, 13 - Limit plate, 14 - Positioning hole;

[0019] 2 - Sensor assembly, 21 - Mounting plate, 22 - Bracket, 23 - Sensor;

[0020] 3 - Gripper, 31 - Jaw, 32 - Guide rod.

Detailed implementation manners

[0021] Please refer to Figures 1 - 4 , this embodiment is an automatic detection device for missed welding of studs on the bottom plate of a battery box. The automatic detection device for missed welding 100 includes a support base 1, a plurality of sensor assemblies 2 vertically arranged on the support base 1 and used to detect whether there are studs 201 welded on the bottom plate 200 of the battery box, and a gripper 3 used to grab the bottom plate 200 of the battery box and make the side with studs on the bottom plate 200 face the sensor assembly 2.

[0022] The support base 1 includes columns 11 arranged on both sides and a cross beam 12 fixed between the middle and lower sections of the two columns 11. A plurality of limit plates 13 are installed on the cross beam 12, and positioning holes 14 are opened on the limit plates 13; an avoidance opening 15 for the gripper 3 to pass through is formed above the cross beam 12 between the two columns 11.

[0023] The sensor assembly 2 includes a mounting plate 21 vertically fixed on the support base, a plurality of brackets 22 installed on one side surface of the mounting plate 21, and a plurality of sensors 23 installed on the brackets 22 through bolts and used for signal acquisition of the studs on the bottom plate 200 of the battery box. The sensor assembly 2 is installed at the upper ends of the columns 11 on both sides of the support frame 1.

[0024] Since there are a plurality of studs 201 welded on the bottom plate 200 of the battery box at different positions and in different directions, the installed sensors 23 are in different states and at different angles and correspond to the plurality of studs 201 one by one. Each stud 201 corresponds to each sensor 23 and is provided with a corresponding number.

[0025] The sensor assembly 2 is connected to an external PLC system. The PLC system determines whether the stud 201 is missing from the bottom plate 200 of the battery case based on whether the sensor 23 receives a signal. If there is a stud 201 at this location, the correspondingly numbered sensor 23 can collect the signal; if there is no stud 201 at this location, the correspondingly numbered sensor 23 cannot collect the signal. Then the PLC system determines that the bottom plate of the battery case is a defective product due to the missing stud 201, and an alarm prompt with the corresponding number of the missing stud 201 will be given on the screen of the PLC system.

[0026] The gripper 3 includes a jaw 31 on the side for gripping the bottom plate 200 of the battery case and a guide rod 32 provided below the jaw 31 and extending into the positioning hole 14. The gripper 3 is positioned in cooperation with the support frame 1 through the guide rod 32 and the positioning hole 14. Even if the stud 201 on the bottom plate 200 of the battery case is very small, it can ensure that the sensor 23 can accurately locate the stud 201. A manipulator (not shown in the figure) drives the jaw 31 of the gripper 3 to grip the bottom plate 200 of the battery case. The manipulator (not shown in the figure) drives the gripper 3 to move to one side of the support seat 1 so that the side of the bottom plate 200 of the battery case with the stud 201 faces the sensor assembly 2. The gripper 3 passes through the avoidance opening 15 between the two columns 11 of the support seat 1 so that the guide rod 32 of the gripper 3 extends into the positioning hole 14 of the support seat 1 to achieve accurate positioning between the gripper 3 and the support seat 1.

[0027] Since the bottom plate 200 of the battery case just welded may drip solder, if the bottom plate 200 of the battery case to be detected is arranged above the sensor assembly 2, the dripping solder may fall on the surface of the sensor assembly 2, affecting the recognition and detection of the bottom plate 200 of the battery case. Therefore, in this embodiment, the bottom plate 200 of the battery case gripped by the gripper 3 is in a vertical state, the sensor assembly 2 is installed on one side of the mounting plate 21, and the side of the bottom plate 200 of the battery case with the stud 201 faces the sensor assembly 2.

[0028] When applying the automatic solder joint omission detection device 100 provided by this solution, a manipulator (not shown in the figure) drives the clamping jaws 31 of the gripper 3 to grip the battery case bottom plate 200. The manipulator (not shown in the figure) drives the gripper 3 to move to one side of the support base 1 so that the side of the battery case bottom plate 200 with the stud 201 faces the sensor assembly 2. The gripper 3 passes through the avoidance opening 15 between the two columns 11 of the support base 1, and the guide rod 32 of the gripper 3 extends into the positioning hole 14 of the support base 1 to achieve precise positioning between the gripper 3 and the support base 1. The sensor assembly 2 collects signals from the studs 201 on the battery case bottom plate 200, and the sensor assembly 2 transmits the acquired signals to the PLC system for identification and judgment. If all the sensors 23 collect signals, it indicates that there is no solder joint omission for the studs 201 of this battery case bottom plate 200. If there is a sensor 23 that does not collect a signal, then there is a situation of solder joint omission for the studs 201 of this battery case bottom plate 200, and this battery case bottom plate 200 will be conveyed to the defective product collection area. At the same time, the PLC system will give an alarm prompt with the corresponding solder joint omission number of the stud 201.

[0029] An automatic solder joint omission detection device for welding studs on a battery case bottom plate in this solution. (1) The sensor assembly 2 is provided with sensors 23 that are in one-to-one correspondence with the numbers of several studs 201 on the battery case bottom plate 200. The sensor assembly 2 is connected to an external PLC system to judge whether there is a solder joint omission for the stud 201. If there is a situation of solder joint omission for the stud 201, the PLC system screen will also give an alarm prompt with the corresponding solder joint omission number of the stud 201. This automatic solder joint omission detection device 100 is suitable for large-scale production on the production line, has high production efficiency, and high detection accuracy; (2) The sensors 23 on the sensor assembly 2 are fixed by bolts. When the positions of different battery case bottom plates 200 or the studs 201 on the battery case bottom plate 200 are different, the position and angle of the sensor 23 can be adjusted according to the actual situation to adapt to the battery case bottom plate 200, and it can be adapted to different battery case bottom plates 200, with strong adaptability and high flexibility; (3) When the sensor assembly 2 is detecting, the gripper 3 passes through the avoidance opening 15 between the two columns 11 of the support base 1, and the guide rod 32 of the gripper 3 extends into the positioning hole 14 of the support base 1 to achieve precise positioning between the gripper 3 and the support base 1. Even if the studs 201 on the battery case bottom plate 200 are very small, it can ensure that the sensor 23 can accurately locate on the stud 201 and ensure the accuracy of detection. Therefore, compared with the prior art, the automatic solder joint omission detection device 100 provided by this solution is suitable for large-scale detection production, not only improves the efficiency of solder joint omission detection for studs, but also has high detection accuracy, strong adaptability, and high flexibility.

[0030] The above are only some embodiments of the present utility model. For those of ordinary skill in the art, without departing from the creative concept of the present utility model, several modifications and improvements can still be made, and these all fall within the protection scope of the present utility model.

Claims

1. An automatic detection device for the missing welding of welding studs on the bottom plate of a battery box, characterized in that: It includes a support base, a number of sensor components vertically arranged on the support base and used to detect whether studs are welded on the bottom plate of the battery box, and a gripper used to grasp the bottom plate of the battery box and make the side with studs on the bottom plate of the battery box face the sensor components. The sensor components include a mounting plate vertically fixed on the support base and a number of sensors mounted on one side surface of the mounting plate for signal acquisition of the studs on the bottom plate of the battery box.

2. The automatic detection device for the missing welding of the stud welded on the battery box bottom plate according to claim 1, wherein: The support base includes columns arranged on both sides and a cross beam fixed between the middle and lower sections of the two columns. A number of the sensor components are all mounted on the upper ends of the columns, and an avoidance opening for the gripper to pass through is formed above the cross beam between the two columns.

3. An automatic detection device for the missing welding of studs welded on the bottom plate of a battery box according to claim 2, characterized in that: A number of limiting plates are mounted on the cross beam, and positioning holes are formed in the limiting plates.

4. An automatic detection device for the missing welding of stud welding on the bottom plate of a battery box, as described in claim 1, wherein: A number of brackets are mounted on the surface of the mounting plate, and the sensors are mounted on the brackets through bolts.

5. The automatic detection device for the missing welding of the stud welded on the battery box bottom plate according to claim 3, wherein: The gripper includes clamping jaws on the side for clamping the bottom plate of the battery box and guide rods arranged below the clamping jaws and extending into the positioning holes. The gripper passes through between the avoidance openings to position the guide rods in the positioning holes to achieve the positioning between the gripper and the support base.

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