Nut welding machine

Abstract

The utility model relates to the technical field of automobile part production, and discloses a nut welding machine which comprises a welding base, a lower fixing rod extending outwards is arranged on the side face of the welding base, a lower electrode column is fixed to the end, away from the welding base, of the lower fixing rod, and the axis of the lower electrode column is perpendicular to the axis of the lower fixing rod. The top of the lower electrode column is detachably connected with a lower electrode for placing a special-shaped workpiece; the side face of the welding base is slidably connected with an upper fixing rod on the same side as the lower fixing rod, the axis of the upper fixing rod is parallel to the axis of the lower fixing rod, an upper electrode column is fixed to the end, away from the welding base, of the upper fixing rod, and the axis of the upper electrode column is perpendicular to the axis of the upper fixing rod. The end, close to the lower electrode column, of the upper electrode column is bent and then extends in the direction of the lower fixing rod, and the lower side of the extended end of the upper electrode column is detachably connected with an upper electrode opposite to the lower electrode in position. The special-shaped workpiece is prevented from being scratched by the welding seat.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts production, in particular to a nut welding machine. Background Art

[0002] As the foundation of the automotive industry, auto parts are essential for its sustained and healthy development. The current vigorous development and innovation within the automotive industry, in particular, requires a robust parts ecosystem. During the automotive parts production process, welded nuts have been developed to overcome the problem of conventional nuts being unable to secure the parent body. Welded nuts offer excellent strength and facilitate bolt installation, leading to their increasing use. Welded nuts are typically welded using resistance welding and come in various types, including round, square, and hexagonal weld nuts.

[0003] At present, the welding of welding nuts mostly adopts the traditional method, that is, manually placing the workpiece and welding nut. The worker first places the workpiece on the resistance welding welding seat, while ensuring that the hole position of the workpiece is placed on the lower electrode on the welding seat, and then places the welding nut, inserting the circular boss of the welding nut into the hole of the workpiece, and starting the resistance welding.

[0004] However, in actual use, due to the large variety of workpieces (such as flat workpieces and special-shaped workpieces), the traditional method of welding nuts is only applicable to flat workpieces. When processing special-shaped workpieces, since the lower electrode on the welding seat is close to the welding seat in the traditional method of welding nuts, if the hole of the special-shaped workpiece is to be placed on the lower electrode of the welding seat, the other side of the special-shaped workpiece (such as a special-shaped workpiece with an L-shaped longitudinal section) will collide with the side of the welding seat, thereby damaging the side of the special-shaped workpiece and making the special-shaped workpiece unusable. Utility Model Content

[0005] The utility model aims to provide a nut welding machine suitable for welding nuts on special-shaped workpieces.

[0006] To achieve the above objectives, various aspects of the present application may be implemented in one or more of the following embodiments:

[0007] 1) A nut welding machine comprises a welding seat, a side surface of the welding seat is provided with a lower fixing rod extending outward, a lower electrode column is fixed on the end of the lower fixing rod away from the welding seat, the axis of the lower electrode column is perpendicular to the axis of the lower fixing rod, and the top of the lower electrode column is detachably connected to a lower electrode for placing a special-shaped workpiece; the side surface of the welding seat is slidably connected to an upper fixing rod on the same side as the lower fixing rod, the axis of the upper fixing rod is arranged parallel to the axis of the lower fixing rod, an upper electrode column is fixed on the end of the upper fixing rod away from the welding seat, the axis of the upper electrode column is perpendicular to the axis of the upper fixing rod, the end of the upper electrode column close to the lower electrode column is bent and extended toward the lower fixing rod, and the lower side of the extended end of the upper electrode column is detachably connected to an upper electrode opposite to the position of the lower electrode.

[0008] The present invention improves the positions of the upper electrode and the lower electrode on the basis of the prior art. The position of the lower electrode is achieved by extending the length of the lower fixing rod, so that the position of the lower electrode of the welding seat used to support the special-shaped workpiece is synchronously moved toward the outside of the welding seat, so that the position of the lower electrode is slightly away from the welding seat; similarly, in order to match the position of the lower electrode, the position of the upper electrode is achieved by changing the shape of the upper electrode column, and the end of the upper electrode column close to the lower electrode column is bent and extended toward the lower fixing rod to form an L-shaped structure as a whole, and the upper electrode is arranged on the lower side of the end of the upper electrode column after extension, so as to ensure that the position of the upper electrode corresponds to the position of the lower electrode.

[0009] The utility model makes the position of the upper electrode and the lower electrode slightly away from the welding seat, so that there is a large space between the upper electrode and the lower electrode and the welding seat. In this way, when the hole of the special-shaped workpiece is placed on the lower electrode, the other side of the special-shaped workpiece (for example, a special-shaped workpiece with an L-shaped longitudinal section) will not collide with the side of the welding seat, thereby avoiding the situation where the welding seat scratches the special-shaped workpiece; then the circular boss of the welding nut is inserted into the hole of the special-shaped workpiece, and the upper electrode is started to move toward the special-shaped workpiece to perform resistance welding.

[0010] 2) A nut welding machine according to 1), wherein:

[0011] An extension seat extending outward is provided on the side of the welding seat, a support platform is fixed on the upper surface of the extension seat, a connecting plate connected to the welding seat is provided on the upper surface of the support platform, and the side of the support platform away from the connecting plate is fixedly connected to the lower fixing rod.

[0012] The utility model adopts an extension seat, a support platform and a connecting plate to connect the welding seat and the lower fixing rod, so that after the lower fixing rod is slightly away from the welding seat, the extension seat, the support platform and the connecting plate can stably support the lower fixing rod.

[0013] 3) A nut welding machine according to 1), wherein:

[0014] A sliding seat that slides up and down along the height direction is fixed to the side of the welding seat, and a lifting cylinder is fixed to the top of the welding seat. The lifting cylinder has a piston rod that can be extended and retracted up and down along the height direction. A nut positioning pin is fixed on the piston rod. The sliding seat is provided with a sliding hole for inserting the nut positioning pin along its height direction, so that the nut positioning pin can move up and down along the length direction of the sliding hole, and the upper electrode is fixed on the sliding seat.

[0015] When in use, the lifting cylinder is started, and the lifting cylinder drives the sliding seat to move downward in the height direction, so that the upper electrode gradually approaches the lower electrode, thereby realizing the welding of the welding nut on the special-shaped workpiece.

[0016] 4) A nut welding machine according to 3), wherein:

[0017] A fixing platform is provided at the bottom of the sliding seat, a side surface of the fixing platform is provided with an elastic arc plate, and the other side surface of the fixing platform is fixedly connected to the upper fixing rod.

[0018] When the sliding seat moves downward, the arc-shaped plate will deform along with the movement of the sliding seat. Since the arc-shaped plate is elastic, the arc-shaped plate supports the sliding seat when it is deformed.

[0019] 5) A nut welding machine according to 1), wherein:

[0020] A control console is provided on the top of the welding seat, and the control console is electrically connected to the lifting cylinder. The control console sends an instruction to the lifting cylinder to start the lifting cylinder to move downward and perform resistance welding.

[0021] 6) A nut welding machine according to 1), wherein:

[0022] A circular positioning block is provided on the top of the lower electrode. The central axis of the positioning block and the central axis of the lower electrode column are located on the same axis. The positioning block is used to locate the position of the special-shaped workpiece.

[0023] The utility model utilizes a circular positioning block to be inserted into the hole of a special-shaped workpiece. At the same time, because the central axis of the positioning block and the central axis of the lower electrode column are on the same axis, the positioning block can accurately fix the position of the special-shaped workpiece, which is convenient for resistance welding.

[0024] 7) A nut welding machine according to 1), wherein:

[0025] A bottom plate is provided at the bottom of the welding seat, and the bottom plate is used to support the welding seat.

[0026] Compared with the existing technology, the technical principle and technical effects of the utility model are as follows:

[0027] The utility model ensures the correct position of the special-shaped workpiece by using the positioning block, and combines the extended lower fixing rod and the bent upper fixing rod so that the upper electrode on the upper fixing rod and the lower electrode on the lower fixing rod are slightly away from the welding seat and have a large space between them. In this way, when the welding nut is welded to the special-shaped workpiece, the special-shaped workpiece will not touch the welding seat, thereby preventing the special-shaped workpiece from being scratched by the side of the welding seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The utility model is a structural schematic diagram of a nut welding machine. DETAILED DESCRIPTION

[0029] The following is further described in detail through specific implementation methods:

[0030] The figure marks in the drawings of the specification include: welding seat 1, base plate 2, support platform 3, extension seat 4, lower fixed rod 5, lower electrode column 6, lower electrode 7, positioning block 8, upper electrode 9, upper electrode column 10, sliding seat 11, lifting cylinder 12, control console 13, upper fixed rod 14, radian plate 15, and hair dryer 16.

[0031] Reference will now be made in detail to the embodiments disclosed herein, examples of which are described herein and illustrated in the accompanying drawings. Although the present disclosure will be described in conjunction with the embodiments and / or examples, they are not intended to limit the present disclosure to these embodiments and / or examples. On the contrary, the present disclosure covers alternatives, modifications, and equivalents.

[0032] In e.g. Figure 1 In the embodiment generally shown, the utility model is a nut welding machine, including a welding seat 1, a bottom of the welding seat 1 is provided with a base plate 2, the base plate 2 is used to support the welding seat 1; the side of the welding seat 1 is provided with a lower fixing rod 5 extending outward, and a lower electrode column 6 is fixed on the end of the lower fixing rod 5 away from the welding seat 1, the axis of the lower electrode column 6 is perpendicular to the axis of the lower fixing rod 5, and the top of the lower electrode column 6 is detachably connected to a lower electrode 7 for placing special-shaped workpieces.

[0033] A circular positioning block 8 is located on top of the lower electrode 7. The central axis of the positioning block 8 is coaxial with the central axis of the lower electrode column 6. The positioning block 8 is used to locate the position of the special-shaped workpiece. The circular positioning block 8 is inserted into the hole of the special-shaped workpiece. At the same time, because the central axis of the positioning block 8 is coaxial with the central axis of the lower electrode column 6, the positioning block 8 can accurately fix the position of the special-shaped workpiece, facilitating resistance welding.

[0034] The side of the welding seat 1 is slidably connected to an upper fixed rod 14 on the same side as the lower fixed rod 5. The axis of the upper fixed rod 14 is arranged parallel to the axis of the lower fixed rod 5. An upper electrode column 10 is fixed on the end of the upper fixed rod 14 away from the welding seat 1. The axis of the upper electrode column 10 is perpendicular to the axis of the upper fixed rod 14. The end of the upper electrode column 10 close to the lower electrode column 6 is bent and extended toward the lower fixed rod 5. The lower side of the extended end of the upper electrode column 10 is detachably connected to the upper electrode 9 opposite to the lower electrode 7.

[0035] This embodiment improves the position of the upper electrode 9 and the lower electrode 7 based on the existing technology. The position of the lower electrode 7 is improved by extending the length of the lower fixing rod 5, so that the position of the lower electrode 7 of the welding seat 1 used to support the special-shaped workpiece is synchronously moved toward the outside of the welding seat 1, so that the position of the lower electrode 7 is slightly away from the welding seat 1; similarly, in order to match the position of the lower electrode 7, the position of the upper electrode 9 is improved by changing the shape of the upper electrode column 10, and the end of the upper electrode column 10 close to the lower electrode column 6 is bent and extended toward the lower fixing rod 5 to form an L-shaped structure as a whole, and the upper electrode 9 is arranged on the lower side of the end of the upper electrode column 10 after extension, so as to ensure that the position of the upper electrode 9 corresponds to the position of the lower electrode 7.

[0036] The position of the upper electrode 9 and the lower electrode 7 are made slightly away from the welding seat 1, so that there is a large space between the upper electrode 9 and the lower electrode 7 and the welding seat 1. In this way, when the hole of the special-shaped workpiece is placed on the lower electrode 7, the other side of the special-shaped workpiece (such as a special-shaped workpiece with an L-shaped longitudinal section) will not collide with the side of the welding seat 1, thereby avoiding the welding seat 1 scratching the special-shaped workpiece; and then the circular boss of the welding nut is inserted into the hole of the special-shaped workpiece, and the upper electrode 9 is started to move toward the direction of the special-shaped workpiece to perform resistance welding.

[0037] See also Figure 1 As shown, in this embodiment, the side of the welding seat 1 is provided with an extension seat 4 extending outward, and a hair dryer 16 is placed on the side of the extension seat 4. The hair dryer 16 blows air toward the lower electrode column 6, so that the special-shaped workpiece can be quickly cooled after welding.

[0038] A support platform 3 is fixed on the upper surface of the extension seat 4, and a connecting plate is provided on the upper surface of the support platform 3 which is connected to the welding seat 1. The side of the support platform 3 away from the connecting plate is fixedly connected to the lower fixed rod 5; at the same time, the extension seat 4, the support platform 3 and the connecting plate are used to connect the welding seat 1 and the lower fixed rod 5, so that after the lower fixed rod 5 is slightly away from the welding seat 1, the extension seat 4, the support platform 3 and the connecting plate can stably support the lower fixed rod 5.

[0039] In addition, a sliding seat 11 that slides up and down along the height direction is fixed to the side of the welding seat 1, and a lifting cylinder 12 is fixed to the top of the welding seat 1. The lifting cylinder 12 has a piston rod that extends up and down along the height direction, and a nut positioning pin is fixed on the piston rod. The sliding seat 11 is provided with a sliding hole along its height direction for inserting the nut positioning pin, so that the nut positioning pin can move up and down along the length direction of the sliding hole, and the upper electrode 9 is fixed on the sliding seat 11.

[0040] When in use, the lifting cylinder 12 is started, and the lifting cylinder 12 drives the sliding seat 11 to move downward in the height direction, so that the upper electrode 9 gradually approaches the lower electrode 7, thereby achieving welding of the welding nut on the special-shaped workpiece.

[0041] At the same time, a fixing platform is provided at the bottom of the sliding seat 11. A resilient curved plate is provided on one side of the fixing platform, and the other side of the fixing platform is fixedly connected to the upper fixing rod 14. When the sliding seat 11 moves downward, the curved plate deforms with the movement of the sliding seat 11. Since the curved plate is resilient, the deformation of the curved plate provides support for the sliding seat 11.

[0042] A control console 13 is provided on the top of the welding seat 1, and the control console 13 is electrically connected to the lifting cylinder 12. The control console 13 sends an instruction to the lifting cylinder 12, starts the lifting cylinder 12 to move downward and perform resistance welding.

[0043] In this embodiment, the positioning block 8 is used to ensure the correct position of the special-shaped workpiece. In combination with the extended lower fixing rod 5 and the bent upper fixing rod 14, the upper electrode 9 on the upper fixing rod 14 and the lower electrode 7 on the lower fixing rod 5 are both slightly away from the welding seat 1, and there is a large space between them and the welding seat 1. In this way, when the welding nut is welded to the special-shaped workpiece, the special-shaped workpiece will not touch the welding seat 1, thereby preventing the special-shaped workpiece from being scratched by the side of the welding seat 1.

[0044] The above are only embodiments of the present invention, and the commonly known specific technical solutions and / or features in the solution are not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several variations and improvements can be made, which should also be regarded as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection claimed in this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A nut welding machine, comprising a welding seat, characterized in that: The side surface of the welding seat is provided with a lower fixing rod extending outward, and a lower electrode column is fixed on the end of the lower fixing rod away from the welding seat, the axis of the lower electrode column is perpendicular to the axis of the lower fixing rod, and the top of the lower electrode column is detachably connected to the lower electrode for placing the special-shaped workpiece; the side surface of the welding seat is slidably connected to an upper fixing rod on the same side as the lower fixing rod, the axis of the upper fixing rod is arranged parallel to the axis of the lower fixing rod, and an upper electrode column is fixed on the end of the upper fixing rod away from the welding seat, the axis of the upper electrode column is perpendicular to the axis of the upper fixing rod, the end of the upper electrode column close to the lower electrode column is bent and extended toward the lower fixing rod, and the lower side of the extended end of the upper electrode column is detachably connected to the upper electrode opposite to the position of the lower electrode.

2. A nut welding machine according to claim 1, characterized in that: An extension seat extending outward is provided on the side of the welding seat, a support platform is fixed on the upper surface of the extension seat, a connecting plate connected to the welding seat is provided on the upper surface of the support platform, and the side of the support platform away from the connecting plate is fixedly connected to the lower fixing rod.

3. A nut welding machine according to claim 1, characterized in that: A sliding seat that slides up and down along the height direction is fixed to the side of the welding seat, and a lifting cylinder is fixed to the top of the welding seat. The lifting cylinder has a piston rod that can be extended and retracted up and down along the height direction. A nut positioning pin is fixed on the piston rod. The sliding seat is provided with a sliding hole for inserting the nut positioning pin along its height direction, so that the nut positioning pin can move up and down along the length direction of the sliding hole, and the upper electrode is fixed on the sliding seat.

4. A nut welding machine according to claim 3, characterized in that: A fixing platform is provided at the bottom of the sliding seat, a side surface of the fixing platform is provided with an elastic arc plate, and the other side surface of the fixing platform is fixedly connected to the upper fixing rod.

5. The nut welding machine according to claim 1, characterized in that: A control console is provided on the top of the welding seat, and the control console is electrically connected to the lifting cylinder.

6. The nut welding machine according to claim 1, characterized in that: A circular positioning block is provided on the top of the lower electrode. The central axis of the positioning block and the central axis of the lower electrode column are located on the same axis. The positioning block is used to locate the position of the special-shaped workpiece.

7. The nut welding machine according to claim 1, characterized in that: A bottom plate is provided at the bottom of the welding seat, and the bottom plate is used to support the welding seat.

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