Welding spot counting device of spot welding machine

Abstract

The utility model discloses a spot welding machine welding spot counting device which comprises a spot welding mechanism and a PLC (programmable logic controller), a mechanical counter linked with the spot welding mechanism is arranged on one side of the spot welding mechanism, the spot welding mechanism comprises an upper electrode and a lower electrode which correspond to each other up and down, and the mechanical counter comprises a reciprocating rod sleeved with a spring and abutted against an upper connecting plate and a swing part linked with the reciprocating rod. The swinging part is in transmission connection with a pawl and is also connected with a counting wheel and an impeller through a transmission shaft; mechanical counting is achieved through PLC welding spot counting and ingenious displacement action combination during electric welding, double counting is provided for the spot welding machine, the combined action mode is reasonable, mechanical counting is carried out once in each electric welding, welding spot counting is more direct, the anti-interference capacity of the mechanical technology is higher, the anti-interference capacity of pure mechanical counting is higher, and the working efficiency of the spot welding machine is improved. The problem that counting of a PLC is prone to being interfered is solved, rechecking and checking of operators are facilitated, the number of welding spots is accurately counted in production, and missing welding / repeated welding is prevented.

Description

Technical Field

[0001] This utility model relates to a weld spot counting device, and more particularly to a weld spot counting device for a spot welding machine. Background Technology

[0002] Spot welding is a common welding process, widely used in automobile manufacturing and white goods industries. Taking automobile manufacturing as an example, doors, roofs, and the main frame all require spot welding for assembly, resulting in stable weld points. Because the number of weld points in these areas is not very large, some traditional manufacturing plants still rely on manual counting, leading to frequent instances of missed welds. With the booming development of new energy vehicles, not only is more sophisticated spot welding technology required, but the number of weld points in individual parts is also increasing. In the field of new energy vehicle battery pack manufacturing, the number of weld points per cell is extremely high. For example, the 4680 battery used in Tesla vehicles has over 800 weld points per cell (excluding structural weld points), while BYD's blade battery, after process optimization, has around 240 weld points per cell. Therefore, weld point counting devices are needed to accurately count the number of weld points and prevent missed or duplicate welds.

[0003] Besides manual counting, existing spot welding machines generally use PLC control systems to create integrated control solutions, utilizing the PLC for weld point counting. However, PLCs are susceptible to interference. In addition to conventional power supply and signal line interference, noise interference can also cause PLC counting errors. The noise generated during spot welding mainly comes from the melting of the electrode wire and the sound produced by the welding machine's operation. This noise level is quite high and has been verified in production processes to affect PLC counting. Utility Model Content

[0004] To address the shortcomings of the aforementioned technologies, this utility model provides a spot welding machine spot counting device.

[0005] To solve the above technical problems, the technical solution adopted by this utility model is: a spot welding machine spot counting device, including a welding frame that supports the spot welding mechanism and a PLC controller located on one side of it. The spot welding mechanism is located at the mounting baffle on the front side of the welding frame, and a mechanical counter that is linked to the spot welding mechanism is provided on one side of the spot welding mechanism.

[0006] The spot welding mechanism includes upper and lower electrodes corresponding to each other. The upper electrode moves within the welding path via a welding cylinder. The upper and lower electrodes are respectively connected to an upper connecting plate and a lower connecting plate extending towards the mechanical counter.

[0007] The mechanical counter is located between the upper connecting plate and the lower connecting plate. The mechanical counter includes a reciprocating rod sleeved with a spring and abutting against the upper connecting plate, and a swinging component that is linked to the reciprocating rod. The swinging component is driven by a pawl, and the swinging component is also connected to a counting wheel and a pulsator through a drive shaft.

[0008] Furthermore, the mounting baffle has a through window and a protruding mounting block directly above the through window. A connecting guide sleeve is bolted to the protruding mounting block, and a guide post driven by a welding cylinder is dynamically connected inside the connecting guide sleeve.

[0009] Furthermore, the lower end of the guide post is connected to the first upper cylindrical clamping shell. The first upper cylindrical clamping shell fastens the electrode arm of the upper electrode through the matching first lower cylindrical clamping shell. The first lower cylindrical clamping shell is integrally machined with a first support platform extending toward the window and is connected to the conductive strip of the upper electrode that runs through both the inside and outside of the window through the first support platform. The electrode arm of the upper electrode is fastened by a gripping rod, and the lower end of the gripping rod is provided with an electrode head.

[0010] Furthermore, the first upper cylindrical clamping shell of the upper electrode has a connecting hole on the side facing the mechanical counter and is matched and connected to the upper connecting plate through the connecting hole.

[0011] Furthermore, the lower electrode includes a second upper semi-cylindrical clamp and a second lower semi-cylindrical clamp that matches it to clamp the electrode arm of the lower electrode. The second lower semi-cylindrical clamp is connected to the mounting baffle by an extension block. The second upper semi-cylindrical clamp is integrally machined with a second support platform extending toward the through window and is connected to the lower electrode conductive strip passing through both the inner and outer sides of the through window by the second support platform. The electrode arm of the lower electrode is implemented by a gripping rod for fastening the lower electrode, and an electrode head is provided at the upper end of the gripping rod.

[0012] Furthermore, the mechanical counter is installed in the carrier box, which has a notch to avoid the swinging component. The bottom surface of the carrier box is connected to the lower connecting plate, and the rear side of the carrier box is connected to the mounting baffle.

[0013] Furthermore, a transmission rod perpendicular to its main body is formed on the reciprocating rod, and a spring is sleeved between the transmission rod and the limiting flange at one end of the reciprocating rod.

[0014] Furthermore, the oscillating component includes an oscillating main board, one side of which has a central connecting hole through the drive shaft, and an ear plate machined on the oscillating main board next to the central connecting hole. The ear plate has a slot that matches the drive rod. On the side of the oscillating main board away from the central connecting hole, there is an oscillating transmission shaft perpendicular to it. A pawl is connected to the oscillating transmission shaft, and the number of sub-pawls on the pawl matches the number of impellers and the transmission matches.

[0015] Furthermore, the number of counting wheels and impellers are matched, the outer ring of the counting wheels is machined with equally spaced Arabic numerals, and the outer ring of the impeller is formed with several continuous shallow teeth and one deep tooth located in one of them.

[0016] When there are multiple counting wheels, each counting wheel has a different digit. The outer diameter of the impeller matched with the counting wheel with the smaller digit is larger, and the outer diameter of the impeller decreases as the digit of the counting wheel it is matched with increases.

[0017] A spot welding machine weld point counting device not only uses PLC for weld point counting but also cleverly utilizes the displacement motion during welding to achieve mechanical counting, providing dual counting for the spot welding machine. The combined action is reasonable, with mechanical counting performed for each weld, making weld point counting more direct. The mechanical technology has stronger anti-interference capabilities, and the pure mechanical counting has strong anti-interference capabilities, making up for the problem that PLC controller counting is easily interfered with. It is beneficial for operators to check and verify, accurately count the number of weld points in production, and prevent missed / repeated welding. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is an assembly drawing of the upper electrode and its connection structure of this utility model.

[0020] Figure 3 This is an assembly drawing of the second upper cylindrical clamp and the second lower cylindrical clamp of this utility model.

[0021] Figure 4 This is a schematic diagram of the mechanical counter of this utility model.

[0022] Figure 5 This is a schematic diagram of the counting wheel of this utility model.

[0023] Figure 6 This is a schematic diagram of the impeller of this utility model.

[0024] Figure 7 This is a schematic diagram of the structure of the swing component of this utility model.

[0025] In the diagram: 1. Welding frame; 2. PLC controller; 3. Display screen; 4. Operation buttons; 5. Mounting baffle; 6. Forward protruding mounting block; 7. Connecting guide sleeve; 8. Welding cylinder; 9. Guide post; 10. First upper semi-cylindrical clamp; 11. First lower semi-cylindrical clamp; 12. First support platform; 13. Upper electrode conductive strip; 14. Second support platform; 15. Lower electrode conductive strip; 16. Electrode arm; 17. Handle; 18. Electrode head; 19. Upper connecting plate; 2 0. Lower connecting plate; 21. Carrier box; 22. Mechanical counter; 23. Counting wheel; 24. Flange; 25. Impeller; 26. Shallow gear; 27. Deep gear; 28. Pawl; 29. ​​Swinging component; 30. Swinging main plate; 31. Shaft connecting hole; 32. Swinging transmission shaft; 33. Ear plate; 34. Slot; 35. Reciprocating rod; 36. Spring; 37. Transmission rod; 38. Transmission shaft; 39. Second upper semi-cylindrical clamp; 40. Second lower semi-cylindrical clamp. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0027] like Figure 1-7 As shown in the figure, this embodiment of the spot welding machine weld spot counting device includes a welding frame 1 that supports the spot welding mechanism and a PLC controller 2 located on one side of it. The spot welding mechanism is located at the mounting baffle 5 on the front side of the welding frame 1. A mechanical counter 22 linked with the spot welding mechanism is set on one side of the spot welding mechanism. It should be noted that this embodiment not only equips the spot welding machine with a PLC controller 2 for weld spot counting under PLC control, but also achieves automatic mechanized weld spot counting capability by setting a mechanical counter 22 linked with the welding action. This provides dual counting for the spot welding machine. The pure mechanical counting has strong anti-interference capability, which solves the problem that the counting of the PLC controller 2 is easily interfered with, and is conducive to the operator's review and inspection.

[0028] like Figure 1 As shown, the spot welding mechanism includes an upper electrode and a lower electrode corresponding to each other. The upper electrode moves within the welding path via a welding cylinder 8. The upper electrode and the lower electrode are respectively connected to an upper connecting plate 19 and a lower connecting plate 20 extending toward one side of the mechanical counter 22.

[0029] Preferably, the mounting baffle 5 has a through window and a protruding mounting block 6 protruding outwards directly above the through window. A connecting guide sleeve 7 is bolted to the protruding mounting block 6. A guide post 9 driven by a welding cylinder 8 is dynamically connected inside the connecting guide sleeve 7. Under the drive of the welding cylinder 8, the guide post 9 moves up and down reciprocally inside the connecting guide sleeve 7.

[0030] Furthermore, such as Figure 2As shown, the lower end of the guide post 9 is connected to the first upper cylindrical clamp 10. The first upper cylindrical clamp 10 is fastened to the electrode arm 16 of the upper electrode by the matching first lower cylindrical clamp 11. The first lower cylindrical clamp 11 is integrally machined with a first support platform 12 extending toward the window and is connected to the upper electrode conductive strip 13 that runs through the inside and outside of the window through the first support platform 12. The electrode arm 16 of the upper electrode is implemented by fastening the upper electrode with a grip 17. The lower end of the grip 17 is provided with an electrode head 18. All the above components and their connection structures are existing.

[0031] like Figure 1 As shown, this embodiment uniquely features a first upper cylindrical clamping shell 10 with a connecting hole on the side facing the mechanical counter 22, which is matched and connected to the upper connecting plate 19. In this embodiment, the first upper cylindrical clamping shell 10 is connected to the upper connecting plate 19 by a double-ended bolt. The double-ended bolt is made of insulating material to prevent accidental electrical conduction.

[0032] like Figure 1-3 As shown, the lower electrode includes a second upper cylindrical clamping shell 39 and a second lower cylindrical clamping shell 40 that matches and clamps the electrode arm 16 of the lower electrode. The second lower cylindrical clamping shell 40 is connected to the mounting baffle 5 via an extension block. The second upper cylindrical clamping shell 39 is integrally machined with a second support platform 14 extending toward the window and is connected to the lower electrode conductive strip 15 that runs through both the inside and outside of the window via the second support platform 14. The electrode arm 16 of the lower electrode is implemented by means of a gripping rod 17 for fastening the lower electrode. The upper end of the gripping rod 17 is provided with an electrode head 18. All of the above components and their connection structures are existing.

[0033] In this embodiment, as Figure 1 As shown, the mechanical counter 22 is disposed in the carrier box 21, and the mechanical counter 22 is also located between the upper connecting plate 19 and the lower connecting plate 20, as shown. Figure 4 As shown, the mechanical counter 22 includes a reciprocating rod 35 fitted with a spring 36 and abutting against the upper connecting plate 19, and a swinging component 29 that links the reciprocating rod 35. Therefore, it can be understood that when the upper electrode performs welding, it will be displaced, which will drive the upper connecting plate 19 to move, and then the upper connecting plate 19 will drive the reciprocating rod 35 to move. In continuous operation, it is a reciprocating motion up and down. The downward movement of the reciprocating rod 35 is transmitted through the downward pressure of the upper connecting plate 19. When the upper connecting plate 19 moves upward, the spring 36 compressed on the reciprocating rod 35 is reset under the action of elastic force, which drives the reciprocating rod 35 to move upward.

[0034] Based on the above structure, the carrier box 21 has a notch to avoid the swinging component 29. The bottom surface of the carrier box 21 is connected to the lower connecting plate 20, and the rear side of the carrier box 21 is connected to the mounting baffle 5. The swinging component 29 is connected to a pawl 28, and the swinging component 29 is also connected to a counting wheel 23 and a pulsator 25 through a drive shaft 38.

[0035] Preferred, such as Figure 4 As shown, a transmission rod 37 perpendicular to its main body is formed on the reciprocating rod 35, and a spring 36 is sleeved between the transmission rod 37 and the limiting flange at one end of the reciprocating rod 35.

[0036] like Figure 7 As shown, the swing component 29 includes a swing main plate 30. A shaft connecting hole 31 passing through the drive shaft 38 is provided on one side of the swing main plate 30. An ear plate 33 located next to the shaft connecting hole 31 is machined on the swing main plate 30. A slot 34 matching the drive rod 37 is provided on the ear plate 33. A swing transmission shaft 32 perpendicular to the shaft connecting hole 31 is formed on the side of the swing main plate 30 away from it. A pawl 28 is connected to the swing transmission shaft 32. The number of pawls on the pawl 28 matches the number of impellers 25 and the transmission matches them. When the reciprocating rod 35 mentioned above moves, it will drive the swing component 29 to swing. Then, the pawl 28 can engage with the impeller 25 to push the impeller 25 to rotate a certain distance in one swing stroke.

[0037] In this embodiment, the number of counting wheels 23 and impellers 25 are matched. The outer rim of the counting wheel 23 is machined with equally spaced Arabic numerals. Since the function of the counting wheel 23 is for counting, the Arabic numerals machined on the outer rim of the counting wheel 23 are 0-9. When there are multiple counting wheels 23, each counting wheel 23 has a different digit. The outer diameter of the impeller 25 matched with the counting wheel 23 with a smaller digit is larger. The outer diameter of the impeller 25 decreases as the digit of the counting wheel 23 it matches increases. Other components that cooperate with the counting wheel 23 include... Figure 6 As shown, the outer ring of the impeller 25 has a number of continuous shallow teeth 26 and a deep tooth 27 located therein;

[0038] Based on the above settings, it should be noted that, assuming the solder joints of a specified component in actual production require a three-digit number, the corresponding digits are units, tens, and hundreds. Therefore, three counting wheels 23 and their corresponding impellers 25 are needed. The impeller 25 of the counting wheel 23 corresponding to the units digit has the largest diameter, while the impeller 25 of the counting wheel 23 corresponding to the hundreds digit has the smallest diameter. This ensures that each time the pawl 28 moves with the swinging component 29, it pushes the shallow-shifting tooth 26 of the impeller 25 corresponding to the units digit forward a distance, achieving the effect of counting units. Furthermore, when the units digit reaches the Arabic numeral nine, the pawl 28 will next advance the deep-shifting tooth 27, which will then push the impeller 25 corresponding to the tens digit, causing the counting wheel 23 corresponding to the tens digit to rotate by one digit. This embodiment optimizes the implementation and component connection structure. The basic principle of the above actions is existing technology.

[0039] In addition, the PLC controller 2 is equipped with a display screen 3 and operation buttons 4. The display screen 3 is used to display welding parameters and weld point count.

[0040] This application discloses a spot welding machine weld point counting device, which not only counts weld points through PLC, but also cleverly utilizes the displacement motion during electric welding to achieve mechanical counting, providing dual counting for the spot welding machine. The combined action is reasonable, and mechanical counting is performed once for each electric welding, making weld point counting more direct. The mechanical technology has stronger anti-interference capabilities, and the pure mechanical counting has strong anti-interference capabilities, making up for the problem that PLC controller counting is easily interfered with. It is beneficial for operators to check and verify, accurately count the number of weld points in production, and prevent missed welding / repeated welding.

[0041] The above embodiments are not intended to limit the present utility model, nor is the present utility model limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the technical solution of the present utility model are also within the protection scope of the present utility model.

Claims

1. A spot welding machine spot counting device, comprising a welding frame (1) supporting a spot welding mechanism and a PLC controller (2) located on one side thereof, characterized in that: The spot welding mechanism is located at the mounting baffle (5) on the front side of the welding frame (1), and a mechanical counter (22) linked with it is provided on one side of the spot welding mechanism; The spot welding mechanism includes an upper electrode and a lower electrode corresponding to each other. The upper electrode moves within the welding path through a welding cylinder (8). The upper electrode and the lower electrode are respectively connected to an upper connecting plate (19) and a lower connecting plate (20) extending towards the side of the mechanical counter (22). The mechanical counter (22) is located between the upper connecting plate (19) and the lower connecting plate (20). The mechanical counter (22) includes a reciprocating rod (35) fitted with a spring (36) and abutting against the upper connecting plate (19), and a swinging component (29) that links the reciprocating rod (35). The swinging component (29) is connected to a pawl (28) and is also connected to a counting wheel (23) and a pulsator (25) via a drive shaft (38).

2. The spot welding machine spot counting device according to claim 1, characterized in that: The mounting baffle (5) has a through window and a protruding mounting block (6) protruding outwards directly above the through window. A connecting guide sleeve (7) is bolted to the protruding mounting block (6), and a guide post (9) driven by a welding cylinder (8) is dynamically connected inside the connecting guide sleeve (7).

3. The spot welding machine spot counting device according to claim 2, characterized in that: The lower end of the guide post (9) is connected to the first upper cylindrical clamp (10). The first upper cylindrical clamp (10) is fastened to the electrode arm (16) of the upper electrode by the matching first lower cylindrical clamp (11). The first lower cylindrical clamp (11) is integrally machined with a first support platform (12) extending toward the window and is connected to the upper electrode conductive strip (13) passing through the inner and outer sides of the window by the first support platform (12). The electrode arm (16) of the upper electrode is implemented by fastening the grip (17) of the upper electrode. The lower end of the grip (17) is provided with an electrode head (18).

4. The spot welding machine spot counting device according to claim 3, characterized in that: The first upper cylindrical clamp (10) of the upper electrode has a connecting hole on the side facing the mechanical counter (22) and is matched and connected to the upper connecting plate (19) through the connecting hole.

5. The spot welding machine spot counting device according to claim 2, characterized in that: The lower electrode includes a second upper cylindrical clamping shell (39) and a second lower cylindrical clamping shell (40) that matches it to clamp the electrode arm (16) of the lower electrode. The second lower cylindrical clamping shell (40) is connected to the mounting baffle (5) by an extension block. The second upper cylindrical clamping shell (39) is integrally machined with a second support platform (14) extending toward the window and is connected to the lower electrode conductive strip (15) that runs through the inside and outside of the window by the second support platform (14). The electrode arm (16) of the lower electrode is implemented by fastening the grip (17) of the lower electrode. The upper end of the grip (17) is provided with an electrode head (18).

6. The spot welding machine spot counting device according to claim 1, characterized in that: The mechanical counter (22) is installed in the carrier box (21). The carrier box (21) has a notch to avoid the swinging component (29). The bottom surface of the carrier box (21) is connected to the lower connecting plate (20), and the rear side of the carrier box (21) is connected to the mounting baffle (5).

7. The spot welding machine spot counting device according to claim 1, characterized in that: A transmission rod (37) perpendicular to its main body is formed on the reciprocating rod (35), and a spring (36) is sleeved between the transmission rod (37) and the limiting flange at one end of the reciprocating rod (35).

8. The spot welding machine spot counting device according to claim 7, characterized in that: The swing component (29) includes a swing main board (30). A shaft connecting hole (31) through the transmission shaft (38) is opened on one side of the swing main board (30). An ear plate (33) located next to the shaft connecting hole (31) is machined on the swing main board (30). A slot hole (34) matching the transmission rod (37) is opened on the ear plate (33). A swing transmission shaft (32) perpendicular to the shaft connecting hole (31) is formed on the side of the swing main board (30). A pawl (28) is connected to the swing transmission shaft (32). The number of pawls on the pawl (28) matches the number of impellers (25) and the transmission match.

9. The spot welding machine spot counting device according to claim 8, characterized in that: The number of the counting wheel (23) and the impeller (25) are matched. The outer ring of the counting wheel (23) is machined with equally spaced Arabic numerals, and the outer ring of the impeller (25) is formed with a number of continuous shallow teeth (26) and a deep tooth (27) located therein. When there are multiple counting wheels (23), the counting wheels (23) are of different digits. The outer diameter of the impeller (25) matched with the counting wheel (23) with a smaller digit is larger. The outer diameter of the impeller (25) decreases as the digit of the counting wheel (23) it is matched with increases.

10. The spot welding machine spot counting device according to claim 1, characterized in that: The PLC controller (2) is equipped with a display screen (3) and operation buttons (4).

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