A circuit breaker contact silver dot welding device

Abstract

The utility model discloses a circuit breaker contact silver point welding device belongs to silver point welding technical field, a circuit breaker contact silver point welding device, the contact clamping block and silver point clamping block in clamping subassembly are opposite active, the bottom of silver point clamping block is fixed with the thimble, the outside end of contact clamping block is seted up with the installation groove no.

Description

Technical Field

[0001] This utility model relates to the field of silver spot welding technology, and more specifically, to a silver spot welding device for circuit breaker contacts. Background Technology

[0002] The circuit breaker contact silver spot welding device is a device used to firmly weld silver alloy to the surface of circuit breaker contacts. Welding silver spots at the connection between the moving and stationary contacts of a circuit breaker or switchgear is mainly to optimize the electrical and mechanical properties of the contacts and ensure the reliability and safety of the equipment during long-term operation. The resistivity of silver is much lower than that of copper. Welding silver spots can significantly reduce the contact resistance of the moving and stationary contact surfaces. After the contact resistance is reduced, Joule heating is reduced when energized, avoiding overheating, oxidation, or fusion welding of the contacts.

[0003] For silver spot welding of circuit breaker contacts, spot welding, also known as resistance welding, is usually used. During welding, the silver spot needs to be placed on the contact first. Since the volume and width of the silver spot are much smaller than the contact, and since the two electrodes on the resistance welding machine need to clamp the two workpieces for welding, traditional welding fixtures can only clamp the workpieces from the side. However, since the volume and width of the silver spot are smaller than the contact, the fixture can only clamp the contact, and the silver spot cannot be clamped. When the machine vibrates during operation, the silver spot is prone to move on the contact, and its position changes, affecting the yield.

[0004] Therefore, a silver spot welding device for circuit breaker contacts is proposed to address the above problems. Utility Model Content

[0005] 1. Technical problems to be solved

[0006] This utility model provides a silver spot welding device for circuit breaker contacts, which can improve the problems existing in related technologies: the volume and width of the silver spot are smaller than the contact, the clamp can only clamp the contact, and the silver spot cannot be clamped. When the machine vibrates during operation, the silver spot is easy to move on the contact, the position changes, and the yield rate is affected.

[0007] 2. Technical Solution

[0008] To solve the above problems, the present invention adopts the following technical solution.

[0009] This application provides a circuit breaker contact silver spot welding device, including a welding device, and further including: a mounting assembly and two clamping assemblies. The mounting assembly includes a fixing plate, and the two clamping assemblies are respectively disposed at both ends of the fixing plate. Each clamping assembly includes a contact clamping block and a silver spot clamping block. The silver spot clamping block is installed on the top of the contact clamping block, and a collar is fixedly installed on the bottom of the silver spot clamping block. A second mounting groove is opened inside the contact clamping block, and a telescopic spring is disposed inside the second mounting groove. The silver spot clamping block moves by cooperating with the collar and the telescopic spring. After the contact clamping block stops against the contact, the silver spot clamping block continues to move relative to the contact clamping block and stops against the silver spot.

[0010] The technical solutions described in this application embodiment have at least the following technical effects:

[0011] The contact clamping block and the silver point clamping block in the clamping assembly are relatively movable. A collar is fixed to the bottom of the silver point clamping block, and a second mounting groove is opened at the outer end of the contact clamping block. A sliding rod is fixed inside the second mounting groove, and a telescopic spring is sleeved on the outer end of the sliding rod. The collar is slidably connected to the sliding rod. Therefore, when the cylinder pushes the silver point clamping block to move, the silver point clamping block can drive the contact clamping block to move simultaneously through the support of the telescopic spring. When the contact clamping block abuts against the circuit breaker contact placed on the shelf, the collar on the silver point clamping block will compress the telescopic spring and continue to move forward. When the silver point clamping block abuts against the silver point placed on the contact, it will stop moving. Through the cooperation of the silver point clamping block and the contact clamping block, the contact and the silver point can be clamped and fixed from the side at the same time to prevent displacement and affect the yield.

[0012] In some embodiments, two cylinders are mounted on the outer end of the welding device, and two electrode heads are mounted on the outer end of the welding device, the two electrode heads being moved by the two cylinders respectively.

[0013] In some embodiments, a mounting plate is fixedly installed on the outer end of the welding device, and the fixing plate is fixedly installed on the outside of the mounting plate.

[0014] In some embodiments, the mounting assembly further includes a placement plate, the outer end of which has a mounting groove, the placement plate being adapted to the mounting groove, and the placement plate being detachably mounted inside the mounting groove.

[0015] In some embodiments, the outer end of the placement plate has a through hole, the electrode head passes through the through hole, and the outer end of the fixing plate has two symmetrically arranged movable slots.

[0016] In some embodiments, movable blocks are fixedly installed on both sides of the contact clamping block, the movable blocks are slidably connected to the movable groove, a slide rod is fixedly installed on the inner side of the second mounting groove, the telescopic spring is sleeved on the outer end of the slide rod, the collar is slidably connected to the slide rod, and the two ends of the telescopic spring abut against the collar and the inner wall of the second mounting groove, respectively.

[0017] In some embodiments, two sliders are fixedly installed at the bottom of the silver point clamping block, two sliding grooves are opened at the top of the contact clamping block, the sliders are slidably connected to the sliding grooves, two cylinders are fixedly installed at the outer end of the mounting plate, the outer end of the silver point clamping block is connected to the output end of the cylinders, and the silver point clamping block is moved by the cylinders. Attached Figure Description

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

[0019] Figure 2 This is a schematic diagram of the clamping component structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the bottom structure of the fixing plate of this utility model;

[0021] Figure 4 This is an exploded view of the clamping assembly of this utility model;

[0022] Figure 5 This is a schematic diagram of the silver dot clamping block structure of this utility model;

[0023] Figure 6 This is a schematic diagram of the contact clamping block structure of this utility model.

[0024] Explanation of the labels in the diagram:

[0025] 1. Welding equipment;

[0026] 2. Cylinder 1;

[0027] 3. Electrode head;

[0028] 4. Mounting plate;

[0029] 5. Cylinder 2;

[0030] 6. Installation components; 61. Fixing plate; 62. Movable slot; 63. Installation slot one; 64. Shelf; 65. Perforation;

[0031] 7. Clamping assembly; 71. Contact clamping block; 72. Moving block; 73. Mounting slot two; 74. Slide groove; 75. Telescopic spring; 76. Silver point clamping block; 77. Slider; 78. Collar; 79. Slide rod. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0033] Please see Figure 1 - Figure 6 This application provides a circuit breaker contact silver spot welding device, including a welding device 1, and further including: a mounting component 6 and two clamping components 7. The mounting component 6 includes a fixing plate 61, and the two clamping components 7 are respectively disposed at both ends of the fixing plate 61. The clamping components 7 include a contact clamping block 71 and a silver spot clamping block 76. The silver spot clamping block 76 is installed on the top of the contact clamping block 71, and a collar 78 is fixedly installed on the bottom of the silver spot clamping block 76. The contact clamping block 71 has a second mounting groove 73 inside, and a telescopic spring 75 is provided inside the second mounting groove 73. The silver spot clamping block 76 drives the contact clamping block 71 to move through the cooperation of the collar 78 and the telescopic spring 75. After the contact clamping block 71 stops against the contact, the silver spot clamping block 76 continues to move relative to the contact clamping block 71 and stops against the silver spot.

[0034] The device in this solution is mainly used to weld silver dots on the moving and stationary contacts of circuit breakers. Since silver dots do not easily melt or vaporize under the high temperature of an electric arc, they can effectively resist the arc erosion generated when breaking the current, reduce contact material loss, and avoid poor contact or failure due to arc erosion. Silver dots can improve conductivity stability, arc resistance and mechanical durability, making them a component that balances performance and cost.

[0035] Welding device 1 is a resistance welding device. Resistance welding is a welding method that uses current to generate heat at the contact resistance and achieves metal connection under pressure. It is widely used in contact silver spot welding, automobile manufacturing, electronic component assembly and other fields. The electrode passes a large current through the contact surface, and the resistance heat raises the metal temperature to the melting point, causing local melting to form a weld nugget. At the same time, the electrode applies pressure to the workpiece to form a weld.

[0036] An installation assembly 6 is mounted on the outside of the welding device 1. The installation assembly 6 is mainly used to support the workpiece, namely the contact and the silver point. Clamping assemblies 7 are set at both ends of the installation assembly 6. The contact clamping block 71 and the silver point clamping block 76 in the clamping assembly 7 are relatively movable. The bottom of the silver point clamping block 76 is fixed with a collar 78. The outer end of the contact clamping block 71 has an installation groove 73. The sliding rod 79 is fixed inside the installation groove 73, and the outer end of the sliding rod 79 is fitted with a telescopic spring 75. The collar 78 is slidably connected to the sliding rod 79. Therefore, when the cylinder 5 pushes the silver point clamping block 76... When the holding block 76 moves, the silver point clamping block 76, supported by the telescopic spring 75, can move the contact clamping block 71 simultaneously. When the contact clamping block 71 comes into contact with the circuit breaker contact placed on the shelf 64, the collar 78 on the silver point clamping block 76 will compress the telescopic spring 75 and continue to move forward. When the silver point clamping block 76 comes into contact with the silver point placed on the contact, it will stop moving. Through the cooperation of the silver point clamping block 76 and the contact clamping block 71, the contact and the silver point can be clamped and fixed from the side at the same time to prevent displacement and affect the yield.

[0037] Please see Figure 1 and Figure 2 Two cylinders 2 are installed at the outer end of the welding device 1, and two electrode heads 3 are installed at the outer end of the welding device 1. The two electrode heads 3 are moved by the two cylinders 2 respectively.

[0038] A mounting plate 4 is fixedly installed on the outer end of the welding device 1, and a fixing plate 61 is fixedly installed on the outside of the mounting plate 4.

[0039] In this design, the welding device 1 has two electrode heads 3 installed on its outer end, and two cylinders 2 are also installed. The cylinders 2 are mainly used to drive the electrode heads 3 to move up and down. The electrode heads 3 are mainly used to apply current and pressure to the workpiece and move up and down by being driven by the cylinders 2.

[0040] Meanwhile, the outer end of the welding device 1 is also fixed with a mounting plate 4. The mounting plate 4 is mainly used to install the mounting assembly 6 and the clamping assembly 7, so that the mounting assembly 6 and the clamping assembly 7 can be located between the two electrode heads 3. Two cylinders 5 are also installed on the outer end of the mounting plate 4. The cylinders 5 are mainly used to drive the clamping assembly 7 to move, so that the two clamping assemblies 7 can move closer to each other to clamp the workpiece. It is worth mentioning that the movement of the two cylinders 5 is synchronous, so that the clamping assembly 7 can clamp both sides of the workpiece at the same time.

[0041] Please see Figure 2 - Figure 4 The mounting assembly 6 also includes a shelf 64. The outer end of the fixing plate 61 has a mounting groove 63. The shelf 64 is adapted to the mounting groove 63 and can be detachably installed inside the mounting groove 63.

[0042] The outer end of the shelf 64 has a through hole 65, through which the electrode head 3 passes. The outer end of the fixing plate 61 has two symmetrically arranged movable slots 62.

[0043] The mounting component 6 in this solution is mainly used to support and place the contacts and silver points. The fixing plate 61 is fixed on the mounting plate 4. A mounting groove 63 is opened at the outer end of the fixing plate 61. The mounting groove 63 is mainly used to install the placement plate 64. The placement plate 64 is fixed to the inner side of the mounting groove 63 by bolts. The placement plate 64 is detachable. This setting allows for the replacement of placement plates 64 with different thicknesses or widths when dealing with different workpieces. The distance between the top of the placement plate 64 and the bottom of the silver point clamping block 76 matches the thickness of the contact. This allows the contact clamping block 71 to clamp only the contact without obstructing the silver point clamping block 76 from clamping the silver point. A through hole 65 is opened in the middle of the placement plate 64. The through hole 65 is mainly used to allow the lower electrode head 3 to move through the through hole 65 and abut against the bottom of the workpiece, while the upper electrode head 3 can press down on the silver point, thereby clamping the contact and the silver point.

[0044] Please see Figure 2 - Figure 6 Movable blocks 72 are fixedly installed on both sides of the contact clamping block 71. The movable blocks 72 are slidably connected to the movable groove 62. A slide rod 79 is fixedly installed inside the second mounting groove 73. A telescopic spring 75 is sleeved on the outer end of the slide rod 79. A collar 78 is slidably connected to the slide rod 79. The two ends of the telescopic spring 75 abut against the collar 78 and the inner wall of the second mounting groove 73, respectively.

[0045] Two sliders 77 are fixedly installed at the bottom of the silver point clamping block 76. Two sliding grooves 74 are opened at the top of the contact clamping block 71. The sliders 77 are slidably connected to the sliding grooves 74. Two cylinders 5 are fixedly installed at the outer end of the mounting plate 4. The outer end of the silver point clamping block 76 is connected to the output end of the cylinders 5. The silver point clamping block 76 is moved by the cylinders 5.

[0046] The clamping component 7 in this solution is mainly used to clamp the contact and the silver point simultaneously. The two clamping components 7 are respectively set on both ends of the fixed plate 61 to form a symmetrical arrangement. The movable blocks 72 are fixed on both sides of the contact clamping block 71. The outside of the fixed plate 61 is provided with two movable slots 62 that are adapted to the movable blocks 72. The movable blocks 72 are slidably connected to the movable slots 62, so that the contact clamping block 71 can slide on the fixed plate 61.

[0047] A mounting groove 73 is formed near the center of the top of the contact clamping block 71. A slide rod 79 is fixed inside the mounting groove 73. A telescopic spring 75 is sleeved on the outer end of the slide rod 79. A collar 78 is fixed at the bottom of the silver point clamping block 76. The collar 78 is sleeved on the outer end of the slide rod 79, allowing the collar 78 to slide on the slide rod 79. At this time, the two ends of the telescopic spring 75 sleeved on the slide rod 79 will abut against the collar 78 and the inner wall of the mounting groove 73. With the support of the telescopic spring 75, the contact clamping block 71 can be moved by the silver point clamping block 76 when it is not in contact with the workpiece.

[0048] Two sliders 77 are fixed at the bottom of the silver point clamping block 76, while two grooves 74 are opened at the top of the contact clamping block 71. The sliders 77 are inserted into the grooves 74 and slidably connected with them. The cooperation between the sliders 77 and the grooves 74 can prevent the silver point clamping block 76 from shifting when sliding.

[0049] When welding, the contact and silver point can be placed on the placement plate 64 first. Then, the two cylinders 5 can be activated. Since the output end of cylinder 5 is directly connected to the silver point clamping block 76, the silver point clamping block 76 can be moved by the cylinder 5. Since the extension spring 75 is pressed between the collar 78 and the inner wall of the mounting groove 73, the silver point clamping block 76 can drive the contact clamping block 71 to move. Since the width of the contact is greater than that of the silver point, the contact clamping block 71 will first abut against the side of the contact. At this time, the contact is subjected to… When the contact clamping block 71 reaches the obstruction, it will stop moving. At this time, the silver point clamping block 76 will continue to move. The collar 78 will also compress the telescopic spring 75 until it abuts against the silver point. Through the cooperation of the silver point clamping block 76 and the contact clamping block 71, the contact and the silver point can be fixed before welding. Finally, the two cylinders 2 will drive the two electrode heads 3 to clamp the contact and the silver point for welding. When the cylinder 5 drives the silver point clamping block 76 to reset, the contact clamping block 71 can also be reset by the force of the telescopic spring 75.

[0050] Working principle: When using this device for welding, first place the contact and silver point on the placement plate 64, then activate the two cylinders 25 to move the silver point clamping block 76. The moving block 72 is slidably connected to the movable groove 62, so that the contact clamping block 71 can slide on the fixed plate 61. Through the extension spring 75, the silver point clamping block 76 drives the contact clamping block 71 to move. The contact clamping block 71 will first abut against the side of the contact. At this time, the silver point clamping block 76 will continue to move until it abuts against the silver point. Through the cooperation of the silver point clamping block 76 and the contact clamping block 71, the contact and silver point can be fixed before welding. Then, the two cylinders 2 will drive the two electrode heads 3 to clamp the contact and silver point for welding.

Claims

1. A circuit breaker contact silver spot welding device, comprising a welding device (1), characterized in that, Also includes: Mounting component (6), the mounting component (6) including a fixing plate (61); Two clamping components (7) are respectively disposed at both ends of the fixing plate (61). Each clamping component (7) includes a contact clamping block (71) and a silver point clamping block (76). The silver point clamping block (76) is installed on the top of the contact clamping block (71). A collar (78) is fixedly installed at the bottom of the silver point clamping block (76). An installation groove (73) is provided inside the contact clamping block (71). A telescopic spring (75) is provided inside the installation groove (73). The silver point clamping block (76) drives the contact clamping block (71) to move through the cooperation of the collar (78) and the telescopic spring (75). After the contact clamping block (71) stops against the contact, the silver point clamping block (76) continues to move relative to the contact clamping block (71) and stops against the silver point.

2. The circuit breaker contact silver spot welding device according to claim 1, characterized in that: The welding device (1) has two cylinders (2) installed at its outer end, and two electrode heads (3) installed at its outer end. The two electrode heads (3) are moved by the two cylinders (2) respectively.

3. The circuit breaker contact silver spot welding device according to claim 2, characterized in that: The welding device (1) has a mounting plate (4) fixedly installed on its outer end, and the fixing plate (61) is fixedly installed on the outside of the mounting plate (4).

4. The circuit breaker contact silver spot welding device according to claim 3, characterized in that: The mounting assembly (6) also includes a shelf (64), and the outer end of the fixing plate (61) is provided with a mounting groove (63). The shelf (64) is adapted to the mounting groove (63), and the shelf (64) can be detachably installed inside the mounting groove (63).

5. The circuit breaker contact silver spot welding device according to claim 4, characterized in that: The outer end of the placement plate (64) is provided with a through hole (65), the electrode head (3) passes through the through hole (65), and the outer end of the fixing plate (61) is provided with two symmetrically arranged movable slots (62).

6. The circuit breaker contact silver spot welding device according to claim 5, characterized in that: Movable blocks (72) are fixedly installed on both sides of the contact clamping block (71). The movable blocks (72) are slidably connected to the movable groove (62). A slide rod (79) is fixedly installed on the inner side of the mounting groove (73). The telescopic spring (75) is sleeved on the outer end of the slide rod (79). The collar (78) is slidably connected to the slide rod (79). The two ends of the telescopic spring (75) abut against the collar (78) and the inner wall of the mounting groove (73) respectively.

7. The circuit breaker contact silver spot welding device according to claim 6, characterized in that: Two sliders (77) are fixedly installed at the bottom of the silver point clamping block (76), and two sliding grooves (74) are opened at the top of the contact clamping block (71). The sliders (77) are slidably connected to the sliding grooves (74). Two cylinders (5) are fixedly installed at the outer end of the mounting plate (4). The outer end of the silver point clamping block (76) is connected to the output end of the cylinders (5). The silver point clamping block (76) is moved by the cylinders (5).

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