High-precision silver contact welding mechanism

Abstract

A high-precision silver contact welding mechanism comprises an equipment base, a welding device connected to the equipment base, a fixing clamp connected to the equipment base and a controller. The welding device comprises a first sliding base connected to the equipment base in a sliding mode, an upper welding head fixedly connected to the first sliding base, a second sliding base connected to the equipment base in a sliding mode and a lower welding head fixedly connected to the second sliding base. The linear servo motor is used for driving the first sliding base to move in the vertical direction, the hydraulic air cylinder is used for driving the second sliding base to move in the horizontal direction, a first limiting groove is formed in the fixing clamp, and the first limiting groove is matched with the lower welding head and a contact to be machined in shape and size. The lower welding head corresponds to the first limiting groove in position, and the controller is electrically connected with the linear servo motor and the hydraulic air cylinder.

Description

Technical Field

[0001] The utility model relates to the technical field of moving contact processing equipment, in particular to a high-precision silver contact welding mechanism. Background Art

[0002] The contact is an important component in the circuit breaker. In order to increase the frequency of use of the contact, increase the contact effect, and enhance the performance of the conductor, silver dots are usually welded on the contact. In the prior art, the silver dot welding work is usually completed automatically by mechanized equipment. However, the existing welding equipment has the following problems: First, since the welding machine usually includes an upper welding head and a lower welding head, both welding heads are energized, and the welding work is completed by the heat generated instantaneously during conduction. However, during the downward pressing process of the upper welding head, there may be a problem that the upper welding head is pressed down too far or the impact force is too strong, causing the silver dot to deform during the welding process, thereby affecting the use effect of the silver contact; second, due to the small size of the silver dot, relative sliding between the silver dot and the contact is likely to occur during the welding process, resulting in inaccurate welding position of the silver dot, affecting the subsequent use of the silver contact. Summary of the invention

[0003] In order to solve the above problems, the utility model provides a high-precision silver contact welding mechanism which can ensure the accurate silver spot welding position, ensure the accurate staying position of the upper welding head during welding, and avoid the deformation problem during silver spot welding.

[0004] The technical solution of the utility model: a high-precision silver contact welding mechanism, including an equipment base, a welding device connected to the equipment base, a fixing fixture connected to the equipment base and a controller, the welding device including a first sliding base slidably connected to the equipment base, an upper welding head fixedly connected to the first sliding base, a second sliding base slidably connected to the equipment base, a lower welding head fixedly connected to the second sliding base, a linear servo motor for driving the first sliding base to move in a vertical direction and a hydraulic cylinder for driving the second sliding base to move in a horizontal direction, the fixing fixture is provided with a first limiting groove, the first limiting groove is respectively adapted to the shape and size of the lower welding head and the contact to be processed, the lower welding head corresponds to the position of the first limiting groove, and the controller is electrically connected to the linear servo motor and the hydraulic cylinder respectively. By adopting the above technical scheme, first, the contact to be processed is placed in the first limiting groove, and the silver point to be processed is placed on the contact, and then the hydraulic cylinder is controlled by the controller to drive the second sliding base to move in the direction of the contact. Since the first limiting groove is respectively adapted to the shape and size of the lower welding head and the contact to be processed, the lower welding head will move with the second sliding base to the position of the contact to support the contact, and then the linear servo motor is controlled by the controller to drive the first sliding base to move vertically downward, so that the upper welding head is pressed down, and the upper welding head and the lower welding head are in contact with the contact at the same time, and the circuit is passed. The current passing through the contact will generate a lot of heat, so that the silver point and the contact are welded together. Compared with the traditional welding machine, the downward pressing process of the upper welding head in this welding device is driven by the linear servo motor. Therefore, the downward pressing distance of the upper welding head can be accurately controlled to avoid deformation problems during silver point welding. Further configuration of the utility model: the fixing clamp includes a clamp base, a first positioning block fixedly connected to the clamp base, a second positioning block slidably connected to the clamp base and a first return spring connected between the clamp base and the second positioning block, the shape of the first positioning block and the second positioning block when enclosed together is adapted to the shape and size of the first limiting groove, and the sliding direction of the second positioning block is horizontal.

[0005] By adopting the above technical solution, when it is necessary to place the contact to be processed on the first limiting groove, first, place the contact to be processed on the first positioning block, and then push the second positioning block to slide a certain distance so that the first positioning block and the second positioning block are in contact. At this time, the shape of the first positioning block and the second positioning block when they are enclosed together is adapted to the shape and size of the first limiting groove. Therefore, the first positioning block and the second positioning block will fix the contact to be processed, thereby ensuring the accuracy of the welding position. In addition, when the welding work is completed, only the second positioning block needs to be released. Through the reaction force provided by the first reset spring, the second positioning block will quickly complete the reset, thereby facilitating the staff to remove the welded contact from the fixture base.

[0006] The cam is configured to move the first end of the second end of the guide rails to the left and right sides of the clamp base, and the cam is configured to move the first end of the second guide rails to the right and left sides of the clamp base, so that the cam can move relative to the first end of the second guide rails.

[0007] By adopting the above technical scheme, after the first positioning block and the second positioning block fix the position of the contact to be processed, the second sliding rod is pushed to move in the direction of the contact. Since the first sliding rod and the second sliding rod are connected by the connecting rod, and the connecting rod is connected to the fixture base by the positioning pin, the first sliding rod, the second sliding rod and the connecting rod actually form a connecting rod structure. Therefore, when the first sliding rod moves in the opposite direction of the second sliding rod, the distance between the first limit plate and the second limit plate will be increased, so that it is convenient for the user to place the silver point between the first limit plate and the second limit plate, and then release the second sliding rod, so that the second sliding rod is reset by the influence of the second return spring, and the first sliding rod will also move accordingly, so that the first limit plate and the second limit plate are in contact, and the space enclosed by the first limit plate and the second limit plate is adapted to the shape and size of the silver point, and at this time the silver point is located at the end of the contact. Therefore, the welding position of the silver point can be guaranteed to be stable, thereby improving the welding effect.

[0008] Further configuration of the utility model: the clamp base is also provided with a third sliding rod slidably connected to the clamp base, a stopper connected to the third sliding rod and a third return spring connected between the stopper and the clamp base; the second sliding rod is provided with a positioning groove, the positioning groove is adapted to the shape and size of the stopper, when the second sliding rod slides a certain distance, the position of the stopper corresponds to the position of the positioning groove, and when the stopper is located on the positioning groove, the first limit plate and the second limit plate are not in contact.

[0009] By adopting the above technical solution, when the second sliding rod slides a certain distance in the direction of the contact, the baffle is affected by the elastic force of the third return spring, and the baffle will slide into the positioning groove, so that the position of the second sliding rod is fixed, and then the silver point to be processed is placed on the contact, and then the third sliding rod is pressed down to make the block leave the range of the positioning groove, and the second sliding rod will automatically reset under the influence of the second return spring, so that the first limit plate and the second limit plate clamp the silver point, thereby achieving the function of fixing the position of the silver point. This can further improve the position stability of the silver point and the contact during welding, and at the same time, reduce the frequency of equipment failures and improve processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Attached Figure 1 The present invention is a schematic structural diagram of a high-precision silver contact welding mechanism according to a specific embodiment of the present invention.

[0011] Attached Figure 2 The present invention is a schematic structural diagram of a fixing fixture in a high-precision silver contact welding mechanism according to a specific embodiment of the present invention.

[0012] Attached Figure 3 The utility model is a cross-sectional view of a fixing fixture in a high-precision silver contact welding mechanism according to a specific embodiment of the utility model.

[0013] 1-equipment base, 2-welding device, 3-fixed fixture, 4-controller, 5-first sliding base, 6-upper welding head, 7-second sliding base, 8-lower welding head, 9-linear servo motor, 10-hydraulic cylinder, 11-first limiting groove, 12-clamp base, 13-first positioning block, 14-second positioning block, 15-first return spring, 16-first sliding rod, 17-second sliding rod, 18-connecting rod, 19-locating pin, 20-first limiting plate, 21-second limiting plate, 22-second return spring, 23-third sliding rod, 24-stopper, 25-third return spring, 26-locating groove. DETAILED DESCRIPTION

[0014] like Figure 1-3As shown, a high-precision silver contact welding mechanism includes an equipment base 1, a welding device 2 connected to the equipment base 1, a fixing fixture 3 connected to the equipment base 1 and a controller 4, the welding device 2 includes a first sliding base 5 slidably connected to the equipment base 1, an upper welding head 6 fixedly connected to the first sliding base 5, a second sliding base 7 slidably connected to the equipment base 1, a lower welding head 8 fixedly connected to the second sliding base 7, a linear servo motor 9 for driving the first sliding base 5 to move in a vertical direction and a hydraulic cylinder 10 for driving the second sliding base 7 to move in a horizontal direction, a first limiting groove 11 is provided on the fixing fixture 3, the first limiting groove 11 is respectively adapted to the shape and size of the lower welding head 8 and the contact to be processed, the lower welding head 8 corresponds to the position of the first limiting groove 11, and the controller 4 is electrically connected to the linear servo motor 9 and the hydraulic cylinder 10 respectively.

[0015] First, the contact to be processed is placed in the first limiting groove 11, and the silver point to be processed is placed on the contact, and then the hydraulic cylinder 10 is controlled by the controller 4 to drive the second sliding base 7 to move in the direction of the contact. Since the first limiting groove 11 is respectively adapted to the shape and size of the lower welding head 8 and the contact to be processed, the lower welding head 8 will move with the second sliding base 7 to the position of the contact to support the contact, and then the linear servo motor 9 is controlled by the controller 4 to drive the first sliding base 5 to move vertically downward, so that the upper welding head 6 is pressed down, and the upper welding head 6 and the lower welding head 8 are in contact with the contact at the same time, the circuit is passed, and the current passing through the contact will generate a lot of heat, so that the silver point and the contact are welded together. Compared with the traditional welding machine, the pressing process of the upper welding head 6 in the welding device 2 is driven by the linear servo motor 9. Therefore, the pressing distance of the upper welding head 6 can be accurately controlled to avoid deformation problems during silver point welding.

[0016] The fixing clamp 3 includes a clamp base 12, a first positioning block 13 fixedly connected to the clamp base 12, a second positioning block 14 slidably connected to the clamp base 12, and a first return spring 15 connected between the clamp base 12 and the second positioning block 14. The shape of the first positioning block 13 and the second positioning block 14 when enclosed together is adapted to the shape and size of the first limiting groove 11, and the sliding direction of the second positioning block 14 is horizontal.

[0017] When it is necessary to place the contact to be processed on the first limiting groove 11, first, place the contact to be processed on the first positioning block 13, and then push the second positioning block 14 to slide a certain distance so that the first positioning block 13 and the second positioning block 14 are in contact. At this time, the shape of the first positioning block 13 and the second positioning block 14 when they are enclosed together is adapted to the shape and size of the first limiting groove 11. Therefore, the first positioning block 13 and the second positioning block 14 will fix the contact to be processed, thereby ensuring the accuracy of the welding position. In addition, when the welding work is completed, only the second positioning block 14 needs to be released. Through the reaction force provided by the first reset spring 15, the second positioning block 14 will quickly complete the reset, thereby facilitating the staff to remove the welded contact from the fixture base 12.

[0018] The clamp base 12 is also provided with a first sliding rod 16 slidably connected to the clamp base 12, a second sliding rod 17 slidably connected to the clamp base 12, a connecting rod 18 movably connected between the first sliding rod 16 and the second sliding rod 17, a positioning pin 19 connected between the connecting rod 18 and the clamp base 12, a first limiting plate 20 fixedly connected to the first sliding rod 16, a second limiting plate 21 fixedly connected to the second sliding rod 17, and a second return spring connected between the second sliding rod 17 and the clamp base 12. 22, the first limit plate 20 and the second limit plate 21 are located in the same horizontal plane, the shape enclosed by the first limit plate 20 and the second limit plate 21 is adapted to the shape and size of the silver point to be processed, when the first limit plate 20 and the second limit plate 21 are in the initial state and the silver point is placed in the space enclosed by the first limit plate 20 and the second limit plate 21, the silver point is located at the end of the contact, and the movement direction of the first sliding rod 16 and the second sliding rod 17 is horizontal and both are perpendicular to the movement direction of the second positioning block 14.

[0019] After the first positioning block 13 and the second positioning block 14 fix the position of the contact to be processed, the second sliding rod 17 is pushed to move in the direction of the contact. Since the first sliding rod 16 and the second sliding rod 17 are connected by the connecting rod 18, and the connecting rod 18 is connected to the fixture base 12 by the positioning pin 19, the first sliding rod 16, the second sliding rod 17 and the connecting rod 18 actually form a connecting rod structure. Therefore, when the first sliding rod 16 moves in the opposite direction to the second sliding rod 17, the first limit plate 20 and the second limit plate The spacing between the first and second limiting plates 20 and 21 will be increased, so that it is convenient for the user to place the silver dot between the first limiting plate 20 and the second limiting plate 21, and then release the second sliding rod 17, so that the second sliding rod 17 is reset under the influence of the second reset spring 22, and the first sliding rod 16 will also move accordingly, so that the first limiting plate 20 and the second limiting plate 21 are in contact, and the space enclosed by the first limiting plate 20 and the second limiting plate 21 is adapted to the shape and size of the silver dot, and at this time the silver dot is located at the end of the contact, therefore, the welding position of the silver dot can be ensured to be stable, thereby improving the welding effect. The clamp base 12 is also provided with a third sliding rod 23 slidably connected to the clamp base 12, a stopper 24 connected to the third sliding rod 23 and a third return spring 25 connected between the stopper 24 and the clamp base 12. The second sliding rod 17 is provided with a positioning groove 26, and the positioning groove 26 is adapted to the shape and size of the stopper 24. When the second sliding rod 17 slides a certain distance, the position of the stopper 24 corresponds to that of the positioning groove 26. When the stopper 24 is located on the positioning groove 26, the first limit plate 20 and the second limit plate 21 are not in contact.

[0020] When the second sliding rod 17 slides a certain distance in the direction of the contact, the baffle is affected by the elastic force of the third return spring 25, and the baffle will slide into the positioning groove 26, so that the position of the second sliding rod 17 is fixed, and then the silver point to be processed is placed on the contact, and then the third sliding rod 23 is pressed down to make the stopper 24 disengage from the range of the positioning groove 26, and the second sliding rod 17 is automatically reset by the second return spring 22, so that the first limit plate 20 and the second limit plate 21 clamp the silver point, thereby achieving the function of fixing the position of the silver point, which can further improve the position stability of the silver point and the contact during welding, and at the same time, reduce the frequency of equipment failures and improve processing efficiency.

Claims

1. A high-precision silver contact welding mechanism, characterized in that: It includes an equipment base, a welding device connected to the equipment base, a fixing fixture connected to the equipment base and a controller, the welding device includes a first sliding base slidably connected to the equipment base, an upper welding head fixedly connected to the first sliding base, a second sliding base slidably connected to the equipment base, a lower welding head fixedly connected to the second sliding base, a linear servo motor for driving the first sliding base to move in a vertical direction and a hydraulic cylinder for driving the second sliding base to move in a horizontal direction, a first limiting groove is provided on the fixing fixture, the first limiting groove is respectively adapted to the shape and size of the lower welding head and the contact to be processed, the lower welding head corresponds to the position of the first limiting groove, and the controller is electrically connected to the linear servo motor and the hydraulic cylinder respectively.

2. A high-precision silver contact welding mechanism according to claim 1, characterized in that: The fixing clamp includes a clamp base, a first positioning block fixedly connected to the clamp base, a second positioning block slidably connected to the clamp base, and a first return spring connected between the clamp base and the second positioning block. The shape of the first positioning block and the second positioning block when enclosed together is adapted to the shape and size of the first limiting groove, and the sliding direction of the second positioning block is horizontal.

3. A high-precision silver contact welding mechanism according to claim 2, characterized in that: The clamp base is also provided with a first sliding rod slidably connected to the clamp base, a second sliding rod slidably connected to the clamp base, a connecting rod movably connected between the first sliding rod and the second sliding rod, a positioning pin connected between the connecting rod and the clamp base, a first limit plate fixedly connected to the first sliding rod, a second limit plate fixedly connected to the second sliding rod and a second return spring connected between the second sliding rod and the clamp base, the first limit plate and the second limit plate are located in the same horizontal plane, the shape enclosed by the first limit plate and the second limit plate is adapted to the shape and size of the silver point to be processed. When the first limit plate and the second limit plate are in the initial state and the silver point is placed in the space enclosed by the first limit plate and the second limit plate, the silver point is located at the end of the contact, and the movement direction of the first sliding rod and the second sliding rod is horizontal and perpendicular to the movement direction of the second positioning block.

4. A high-precision silver contact welding mechanism according to claim 3, characterized in that: The clamp base is also provided with a third sliding rod slidably connected to the clamp base, a stopper connected to the third sliding rod and a third return spring connected between the stopper and the clamp base. The second sliding rod is provided with a positioning groove, and the positioning groove is adapted to the shape and size of the stopper. When the second sliding rod slides a certain distance, the position of the stopper corresponds to that of the positioning groove. When the stopper is located on the positioning groove, the first limit plate and the second limit plate are not in contact.

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