Latent automatic welding device

Abstract

The present invention discloses a latent automatic welding device, which includes a welding unit placed at the bottom of a frame welding station, the welding unit having a support portion and a rotating welding portion for locally adjusting the welding angle; a displacement unit, the displacement unit placed at the bottom of the welding unit for driving the welding unit to move to the position of the frame welding point; wherein the support portion is electrically connected to the welding cable, and the rotating welding portion is connected to the support portion via a rotating portion and maintains an electrical connection. The present invention solves the traditional welding mode that requires the welding clamp to be lowered, moved, and then raised. It not only simplifies the operating steps of the equipment and improves efficiency, but also reduces the range of motion of the displacement unit and reduces investment. It also solves the problem of the welding clamp being dragged by the large rigidity of the welding cable, thereby reducing the sliding resistance of the welding clamp and simplifying the equipment structure. At the same time, it solves the problem of insufficient wire height caused by Z-axis lifting.

Description

Technical Field

[0001] The present invention relates to the field of automobile production, and in particular to a latent automatic welding device. Background Art

[0002] When welding the welds on the bottom of the car body, especially under the floor, the welds are located far below the normal working height. Therefore, the car body must be lifted to a higher height using dedicated equipment. This significantly increases investment due to the need to lift the car body. At the same time, lifting the car body too high will raise the center of gravity, posing a safety hazard. Therefore, the lifting height is generally only required to meet the requirements of the operation. The lifting equipment is also prone to interfere with the welding operation, making it difficult for the operator to operate and increasing the labor intensity. Summary of the Invention

[0003] The present invention aims to provide a latent automatic welding device.

[0004] To achieve the above purpose, the present invention can adopt the following technical solutions:

[0005] The latent automatic welding device of the present invention comprises a welding device placed below the frame welding station.

[0006] A welding unit having a supporting portion and a rotating welding portion for locally adjusting a welding angle;

[0007] A displacement unit, the displacement unit being disposed below the welding unit and configured to drive the welding unit to move to a welding point of the vehicle frame;

[0008] The support portion is electrically connected to the welding cable, and the rotary welding portion is connected to the support portion via the rotating portion and maintains electrical connection.

[0009] Preferably, the displacement unit includes a mounting plate arranged at the bottom of the frame welding station, an XY slide module is arranged on the mounting plate, the XY slide module is composed of a vertical X-axis slide structure and a Y-axis slide structure, and the welding unit is arranged on the top of the Y-axis slide structure.

[0010] Preferably, the support portion includes a support base, and two pairs of electrode plate assemblies with the same structure are symmetrically arranged on both sides above the support base. The electrode plate assemblies are respectively composed of two electrode plates connected in series, and the two pairs of electrode plate assemblies are respectively connected to the welding cables; a welding clamp connecting seat is respectively provided on the support base between each group of electrode plate assemblies.

[0011] Preferably, the rotary welding part includes a welding clamp consisting of a left handle and a right handle, which are rotatably connected to the welding clamp connecting seat on the same side through a rotating shaft at the middle position of the left handle and the right handle, and the rotating shaft on one side is transmission-connected to a welding clamp rotating motor.

[0012] Preferably, the rotating part includes a first arc-shaped electrode connecting plate and a second arc-shaped electrode connecting plate respectively arranged at the lower parts of the left handle and the right handle, and the first arc-shaped electrode connecting plate and the second arc-shaped electrode connecting plate are respectively connected to the side walls of the electrode plate assembly on the same side in sliding contact.

[0013] Preferably, through holes are provided on the two electrode plates in opposite directions of each group of electrode plate assemblies; the rotating part includes a first arc-shaped electrode connecting plate and a second arc-shaped electrode connecting plate respectively arranged at the lower parts of the left handle and the right handle, and the first arc-shaped electrode connecting plate and the second arc-shaped electrode connecting plate respectively slide through the through holes between the electrode plate assemblies on the same side.

[0014] Preferably, the welding device further comprises a clamping unit, and the clamping unit is used to clamp the first arc electrode connecting plate and the second arc electrode connecting plate.

[0015] Preferably, the clamping unit includes a clamping assembly respectively arranged at the position of each electrode plate, and the clamping assemblies have the same structure and are provided with a clamping handle, a mounting platform and a clamping cylinder. The mounting platform is arranged on the top of the electrode plate, and the clamping cylinder is arranged on the outside of the electrode plate. The piston rod of the clamping cylinder is arranged upward, the middle part of the clamping handle is hinged to the mounting platform, and the bottom of the outer end of the clamping handle is hinged to the piston rod of the clamping cylinder. The inner end of the clamping handle extends to the position of the first arc electrode connecting plate or the second arc electrode connecting plate on the same side, and is used to clamp the first arc electrode connecting plate or the second arc electrode connecting plate after the piston rod of the clamping cylinder is pushed out.

[0016] Preferably, a clamping head is provided at the inner end of the clamping handle.

[0017] The present invention solves the traditional welding mode that requires the welding clamp to drop, move and then rise, which not only simplifies the operating steps of the equipment and improves efficiency, but also reduces the movement range of the displacement unit and reduces investment; it also solves the problem of the welding clamp being dragged by the large rigidity of the welding cable, thereby reducing the sliding resistance of the welding clamp and simplifying the equipment structure; and at the same time solves the problem of insufficient wire height caused by Z-axis lifting. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] Figure 2 It is a structural schematic diagram of the welding unit of the present invention.

[0020] Figure 3 yes Figure 2 Schematic diagram of the right view structure.

[0021] Figure 4 yes Figure 2 Schematic diagram of the top view structure. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0024] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0025] In addition, the terms "first," "second," and so on, used in this disclosure are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one of these features.

[0026] like Figure 1-4As shown, the latent automatic welding device described in the present invention includes a welding unit placed at the bottom of the frame welding station 10, the welding unit has a support part and a rotating welding part, which is used to locally adjust the welding angle; a displacement unit, the displacement unit is placed at the bottom of the welding unit, and is used to drive the welding unit to move to the position of the frame welding point; wherein, the support part is electrically connected to the welding cable 20, and the rotating welding part is connected to the support part through the rotating part and maintains electrical connection; the displacement unit includes a mounting plate 30 arranged at the bottom of the frame welding station 10, and an XY slide module is arranged on the mounting plate 30, and the XY slide module is composed of a vertical X-axis slide structure 31 and a Y-axis slide structure 32, and the welding unit is arranged on the top of the Y-axis slide structure 32 The XY slide module adopts a screw slide module, which makes the repeated positioning accuracy high, the stability strong, and the installation and disassembly are convenient, and can realize precision fine-tuning, positioning, and quantitative movement; the support part includes a support base 40, and two pairs of electrode plate assemblies with the same structure are symmetrically arranged on both sides above the support base 40. The electrode plate assemblies are respectively composed of two electrode plates 41 connected in series with each other, and the two pairs of electrode plate assemblies are respectively connected to the welding cables; a welding clamp connecting seat 42 is respectively provided on the support base 40 between each group of electrode plate assemblies; the rotary welding part includes a welding clamp composed of a left handle 43 and a right handle 44, and the left handle 43 and the right handle 44 are respectively rotatably connected to the welding clamp connecting seat 42 on the same side through a rotating shaft 45 at the middle position of the left handle 43 and the right handle 44. , one side of the rotating shaft 45 is connected to the welding clamp rotating motor 46; the rotating part includes a first arc-shaped electrode connecting plate 50 and a second arc-shaped electrode connecting plate 51 respectively arranged at the lower part of the left handle 43 and the right handle 44, and the first arc-shaped electrode connecting plate 50 and the second arc-shaped electrode connecting plate 51 are respectively connected to the side wall of the electrode plate assembly on the same side in sliding contact (through holes can also be provided on the two electrode plates 41 in the opposite direction of each group of electrode plate assemblies, and the first arc-shaped electrode connecting plate 50 and the second arc-shaped electrode connecting plate 51 are respectively slidably inserted into the through holes between the electrode plate assemblies on the same side); the welding device also includes a clamping unit, which is used to clamp the first arc-shaped electrode connecting plate 50 and the second arc-shaped electrode connecting plate 51; the clamping unit It includes a clamping assembly respectively arranged at the position of each electrode plate 41. The clamping assemblies have the same structure and are all provided with a clamping handle 60, a mounting platform 61 and a clamping cylinder 62. The mounting platform 61 is arranged on the top of the electrode plate 41, and the clamping cylinder 62 is arranged on the outside of the electrode plate 41. The piston rod of the clamping cylinder 62 is arranged upward. The middle part of the clamping handle 60 is hinged to the mounting platform 61, and the bottom of the outer end of the clamping handle 60 is hinged to the piston rod of the clamping cylinder 62. The inner end of the clamping handle 60 extends to the position of the first arc-shaped electrode connecting plate 50 or the second arc-shaped electrode connecting plate 51 on the same side. After the piston rod of the clamping cylinder 62 is pushed out, the inner end of the clamping handle 60 clamps the first arc-shaped electrode connecting plate 50 or the second arc-shaped electrode connecting plate 51. A chuck 63 is provided at the inner end of the clamping handle 60.

[0027] The working process of this device is briefly described as follows: when the car body is transported from the previous workstation to this workstation, the welding clamp rotates to a nearly horizontal position to avoid the conveyor line. When the conveyor line retreats, the car body is fixed, and the welding clamp moves to the corresponding welding position under the joint action of the displacement unit and the welding clamp rotation motor 46. The clamping unit clamps the first arc electrode connecting plate 50 or the second arc electrode connecting plate 51 and the electrode plate 41, and power is turned on through the welding cable 20 for welding. When the welding clamp does not rotate and only moves by the displacement unit, the clamping unit remains clamped; when the welding clamp needs to rotate, the clamping unit is first opened, and the welding clamp rotation motor 46 drives the welding clamp to rotate. When it rotates to the specified position, the clamping unit clamps for welding operations.

[0028] The lead screw slide table module is used to realize the X and Y axis movement positioning of the welding clamp, and the rotation of the welding clamp is used to realize the movement in the Z and Y directions to weld the bottom of the vehicle body. The welding clamp adopts the rotation mode to replace the traditional Z axis lifting mode, which can greatly reduce the height of the welding clamp and meet the avoidance requirements between the welding clamp and the vehicle body during transportation. At the same time, the rotation mode of the welding clamp can increase the range of movement of the welding clamp and reduce the size of the moving mechanism.

[0029] In order to achieve the rotation range of the welding clamp, the electrode plate assembly is composed of two electrode plates 41 connected in series. The length of the first arc-shaped electrode connecting plate 50 and the second arc-shaped electrode connecting plate 51 is longer than the distance between the two electrode plates 41. No matter how large the rotation angle of the welding clamp is, it can ensure that one of the electrode plates 41 in the two electrode plate assemblies on both sides is connected to the first arc-shaped electrode connecting plate 50 and the second arc-shaped electrode connecting plate 51 on the same side, which greatly increases the movement range of the welding clamp.

[0030] Unlike traditional cables that are directly connected to the rear end of the welding clamp, the rear end of the welding clamp adopts a first arc-shaped electrode connecting plate 50 and a second arc-shaped electrode connecting plate 51. The welding cable 20 is connected to the electrode plate 41, and the first arc-shaped electrode connecting plate 50 and the second arc-shaped electrode connecting plate 51 are connected to the electrode plate 41 by pneumatic clamping. When clamped, it can meet the requirements of achieving large welding current. When opened, it can solve the problem of dragging interference and difficulty in movement caused by the large stiffness of the welding cable 20 when the welding clamp rotates and moves.

Claims

1. A latent automatic welding device, characterized in that: The welding device includes a A welding unit having a supporting portion and a rotating welding portion for locally adjusting a welding angle; A displacement unit, the displacement unit being disposed below the welding unit and configured to drive the welding unit to move to a welding point of the vehicle frame; Wherein, the support portion is electrically connected to the welding cable, and the rotary welding portion is connected to the support portion through the rotating portion and maintains electrical connection; The displacement unit includes a mounting plate arranged at the bottom of the frame welding station, an XY slide module is arranged on the mounting plate, the XY slide module is composed of a vertical X-axis slide structure and a Y-axis slide structure, and the welding unit is arranged on the top of the Y-axis slide structure; The support portion includes a support base, and two pairs of electrode plate assemblies with the same structure are symmetrically arranged on both sides above the support base. The electrode plate assemblies are respectively composed of two electrode plates connected in series. The two pairs of electrode plate assemblies are respectively connected to welding cables; a welding clamp connection seat is respectively provided on the support base between each set of electrode plate assemblies; The rotary welding part includes a welding clamp consisting of a left handle and a right handle, wherein the middle positions of the left handle and the right handle are rotatably connected to the welding clamp connecting seat on the same side through a rotating shaft, wherein the rotating shaft on one side is transmission-connected to a welding clamp rotating motor; The rotating part includes a first arc-shaped electrode connecting plate and a second arc-shaped electrode connecting plate respectively arranged at the lower parts of the left handle and the right handle. The first arc-shaped electrode connecting plate and the second arc-shaped electrode connecting plate are respectively connected to the side walls of the electrode plate assembly on the same side in sliding contact.

2. The latent automatic welding device according to claim 1, wherein: Through holes are provided on the two electrode plates in opposite directions of each group of electrode plate assemblies; the rotating part includes a first arc-shaped electrode connecting plate and a second arc-shaped electrode connecting plate respectively arranged at the lower parts of the left handle and the right handle, and the first arc-shaped electrode connecting plate and the second arc-shaped electrode connecting plate respectively slide through the through holes between the electrode plate assemblies on the same side.

3. The latent automatic welding device according to claim 1 or 2, wherein: The welding device further includes a clamping unit configured to clamp the first arc-shaped electrode connecting plate and the second arc-shaped electrode connecting plate.

4. The latent automatic welding device according to claim 3, wherein: The clamping unit includes a clamping assembly respectively arranged at the position of each electrode plate. The clamping assemblies have the same structure and are provided with a clamping handle, a mounting platform and a clamping cylinder. The mounting platform is arranged on the top of the electrode plate, and the clamping cylinder is arranged on the outside of the electrode plate. The piston rod of the clamping cylinder is arranged upward. The middle part of the clamping handle is hinged to the mounting platform, and the bottom of the outer end of the clamping handle is hinged to the piston rod of the clamping cylinder. The inner end of the clamping handle extends to the position of the first arc electrode connecting plate or the second arc electrode connecting plate on the same side, and is used to clamp the first arc electrode connecting plate or the second arc electrode connecting plate after the piston rod of the clamping cylinder is pushed out.

5. The latent automatic welding device according to claim 4, wherein: A clamping head is provided at the inner end of the clamping handle.

Images