Welding device for processing automobile parts

Abstract

The present application relates to the technical field of welding devices, and discloses a welding device for processing automobile parts, comprising a welding device, a refractive lens arranged at a bending position in the welding device, a sealing lens arranged at the lower end of the welding device, and a convex lens arranged in the welding device, wherein the convex lens can move up and down, and an external movable sleeve of the welding device is provided with a moving part that can drive the convex lens to move up and down, and a support member that moves up and down synchronously is provided on one side of the moving part, and a support tube is provided at the inner bottom of the support member, and a push rod is slidably connected in the support tube, and a compression spring is fixedly connected to the top of the push rod, and the compression spring is compressed to keep the push rod extending out of the support tube, and the length of the push rod fully extending out of the support tube is the same as the floating error allowed after the laser is focused by the convex lens. According to the synchronous movement of the support member, the moving part and the convex lens, the laser welding point can always be stabilized at the bottom position of the support member, so as to achieve the best welding effect during welding.

Description

Technical Field

[0001] The present application relates to the technical field of welding devices, and in particular to a welding device for processing automobile parts. Background Art

[0002] In existing laser welding technology, the laser welding point (laser convergence point) needs to be manually adjusted. Laser can be harmful to the human body. If a robotic arm is used for automatic adjustment, the adjustment position can easily cause deviations, which may be too high or too low. If it is too high, the welding point of the robotic arm will be too high, resulting in unsatisfactory welding results. If it is too low, the laser welding point will penetrate the parts and cause damage to the parts. If the laser welding point is located at the bottom of the robotic arm, it will cause pressure damage to the parts when the robotic arm moves downward, thereby increasing costs.

[0003] Among automotive parts, there are many parts with small welds that need to be welded. It is only necessary to laser melt and mix the contact positions of the two parts to be welded. Some welds are larger and require the use of welding wire. The laser melts the welding wire into the weld for welding. If the weld suddenly becomes larger, the parts need to be re-welded, which wastes a lot of time and leads to a decrease in production. Summary of the Invention

[0004] The present application proposes a welding device for processing automobile parts, which has the advantages of saving costs and time, and can be adjusted according to the curvature of the parts, so as to solve the problems of inaccurate welding, time-consuming welding steps, and cost saving.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solution: a welding device for processing automobile parts, comprising a welding device, a moving part and a support part, wherein each bending position above the interior of the welding device is provided with a refractive lens completely embedded in the interior of the welding device, the lower end of the welding device is provided with an embedded sealing lens, and a convex lens that can move up and down is provided below the welding device, a rectangular hole is opened between the moving part and the welding device for the up and down movement of the convex lens, the end of the moving part away from the welding point is fixedly welded to the support part, the top of the support part is provided with a cylindrical air inlet, the bottom of the support part is provided with a welding wire tube embedded in and passing through the interior of the support part to facilitate the passage of the welding wire, a support rod is provided below the welding wire tube, a compression spring is provided between the bottom of the support rod and the bottom of the support part, the compression spring is embedded in the top rod, and the lower end of the support part near the welding point is provided with a cylindrical air outlet.

[0006] Furthermore, a rectangular hole is provided between the movable part and the welding device, and sealing rings are provided at the upper and lower ends of the rectangular hole and embedded in the outer wall of the welding device, and the sealing rings are tightly fitted to the movable part.

[0007] The rectangular hole facilitates the up and down movement of the convex lens. Both ends of the convex lens are provided with protruding blocks and embedded in the inner wall of the moving part. The moving part is used to control the up and down movement of the bald head to facilitate the adjustment of the welding point.

[0008] Furthermore, a welding wire tube is embedded in the cylindrical support member, and a wire feeding tube is connected to the upper end of the welding wire tube. A proximity switch sensor is provided on the inner wall of the welding wire tube for indicating and controlling the wire feeding mechanism. The compression spring and the push rod are independent individuals. When the push rod is supported on the surface of the spare part in a normal state, there is a distance between the bottom of the push rod and the inner bottom of the support member. A ball is provided at the lower end of the push rod, and the material of the push rod is a material resistant to high temperatures generated by laser welding.

[0009] A support rod is provided above the compression spring. When the push rod below the spring drops due to the enlargement of the weld, the spring will also drop as the push rod drops, and the support rod will also drop. The proximity switch sensor detects the signal that the support rod has left, which will instruct the control wire feeder to perform the wire feeding operation. On the contrary, when the support rod is lifted back to its position, the proximity switch sensor detects the proximity signal, which will instruct the control wire feeder to stop feeding the wire.

[0010] The beneficial effects of the present invention are as follows:

[0011] The present application provides a welding device for processing automobile parts, which drives the up and down movement of the support rod by the up and down movement of the push rod, thereby achieving a welding effect according to the curvature and flatness of the surface of the parts.

[0012] The present application provides a welding device for processing automobile parts, which controls the movement of a movable part through a support part to drive the convex lens to move up and down, and always stabilizes the laser focus at the welding point position, so that weld parts with different shapes and surfaces can obtain the best welding effect.

[0013] The present application provides a welding device for processing automobile parts. A sealing ring is provided between a moving part and the welding device to prevent impurities during the welding process from entering the welding device and affecting the normal operation of the laser welding equipment.

[0014] The present application provides a welding device for processing automobile parts. A proximity switch sensor is provided inside the welding wire tube. According to the up and down movement of the support rod, it is judged whether the current weld size requires wire feeding, thereby controlling the timing of wire feeding and realizing the adjustment of wire feeding according to the size of the weld. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only embodiments of the present invention. Those skilled in the art can also derive other drawings based on the provided drawings without inventive work.

[0016] Figure 1 It is a schematic diagram of the structure overview of the present invention;

[0017] Figure 2 For the present invention Figure 1 A local enlarged view of point C;

[0018] Figure 3 For the present invention Figure 1 A local enlarged view of point B;

[0019] Figure 4 For the present invention Figure 1 A partial enlarged view of point A.

[0020] In the figure: 1. welding device; 2. support member; 21. support tube; 3. moving member; 4. convex lens; 5. sealing lens; 6. refractive lens; 7. air inlet; 8. welding wire; 9. support rod; 10. compression spring; 11 push rod; 12. ball bearing; 13. air outlet; 14. sealing ring; 15. proximity switch sensor; 16. welding wire tube; 17. wire feeding tube. DETAILED DESCRIPTION

[0021] 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. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] like Figure 1 As shown, the welding device 1 is provided with a variety of lenses, namely a refractive lens 6, a convex lens 4 and a sealing lens 5 (there are a variety of lenses in the prior art that are not shown in this invention). When the laser light is refracted by the refractive lens 6 onto the convex lens 4, the laser light will be focused at one point according to the principle of focusing the light of the convex lens 4, so that the temperature of the welding point will rise rapidly, and the temperature of the surface of the parts or the welding wire will be reached to melt, and welding can begin.

[0023] like Figure 1 and Figure 3As shown, the outer wall of the welding device 1 is sleeved with a moving part 3, and a sealing ring 14 is embedded in the outer wall of the welding device 1 between the moving part 3 and the welding device 1, which fits tightly with the inner wall of the moving part 3. The inner wall of the moving part 3 is also embedded with bumps at both ends of the convex lens 4. There are two rectangular holes between the two sealing rings 14, which fit with the two ends of the convex lens 4 to facilitate the up and down movement of the convex lens 4 in the rectangular holes. The right end of the moving part 3 is welded to the support part 2. When the support part 2 moves up and down, it will drive the moving part 3 to move up and down. At the same time, the moving part 3 will also move up and down with the convex lens 4, so that the laser welding point is always on the same horizontal plane as the bottom of the support part 2.

[0024] like Figure 1 and Figure 2 As shown, a support tube 21 is provided at the bottom of the support member 2, and a push rod 11 is provided below and inside the support tube 21. A ball 12 is provided below the push rod 11 to fit the surface of the spare part. A compression spring 10 is embedded inside the push rod 11. The compression potential energy of the compression spring 10 can maintain the flatness of the surface of the spare part at a position that can fluctuate up and down within an allowable floating error. The floating error refers to the upper and lower height range near the laser focus. Within this range, the laser has a better welding effect. When the compression spring 10 is compressed to a certain position and can no longer be compressed, the supporting force on the surface of the spare part can support the support member 2, thereby driving the synchronous movement of the moving member 3. The moving member 3 will also drive the convex lens 4 to move synchronously, stabilizing the laser welding point at the bottom of the support member 2, so that weld parts with different surface shapes can obtain the best welding effect. The maximum compression amount of the compression spring 10 or the maximum retraction amount of the push rod 11 is the floating error amount.

[0025] An air inlet 7 is provided above the support member 2. When welding begins, the air inlet 7 above the support member 2 will supply gas from the shielding gas cylinder to the inside of the support member 2, and finally the gas is sprayed out through the air outlet 13 to cover the position of the welding point. During the welding process, the weldment is melted by high temperature and is easily oxidized. The shielding gas is used to isolate the welding position from the air to prevent oxidation.

[0026] like Figure 1 、 Figure 2 and Figure 4 As shown, a support rod 9 is slidably installed inside the support cylinder 21, and one end of the support rod 9 is connected to the inside of the welding wire tube 16, and the end of the support rod 9 connected to the inside of the welding wire tube 16 is a permanent magnetic material, which is used to cooperate with the detection of the proximity switch sensor 15. A proximity switch sensor 15 is provided below the inner wall of the welding wire tube 16. When the proximity switch sensor 15 is close to the end of the support rod 9 containing the magnetic pole, the proximity switch sensor 15 transmits a power-off signal to the wire feeder control end, so that the wire feeder stops feeding the wire to the welding point; under normal conditions, the supporting force of the spare parts supports the push rod 11, and a gap is left between the top of the push rod 11 and the bottom of the support cylinder 21. For details, please refer to Figure 2 When the weld seam encountered by the ball 12 under the push rod 11 becomes larger, the ball 12 and the push rod 11 will fall into the weld seam. At this time, the compression spring 10 and the support rod 9 will also drop. The proximity switch sensor 15 will transmit the start signal to the control end of the wire feeder because one end of the support rod 9 drops. The wire feeder starts feeding the wire and uses the laser to melt the welding wire 8 to the weld seam for welding.

[0027] In this application, the elastic modulus of the compression spring 10 should be adapted to the deadweight of the support rod 9, so that when the bottom end of the top rod 11 contacts the workpiece to be welded, the compression spring 10 is compressed, such as Figure 2 As shown, at this time, the elastic force generated by the compression will lift the support rod 9 to the inner top of the support tube 21. When the weld between the push rod 11 and the workpiece to be welded is large, the push rod 11 loses support and falls. The compression of the compression spring 10 is not enough to lift the support rod 9, so the support rod 9 also falls synchronously, and the relative proximity sensor 15 will move away.

Claims

1. A welding device for processing automobile parts, comprising a welding device (1), a refractive lens (6) provided at a bending position in the welding device (1), a sealing lens (5) provided at the lowermost end of the welding device (1), and a convex lens (4) provided in the welding device (1), characterized in that: The convex lens (4) can move up and down, and the outer movable sleeve of the welding device (1) is provided with a moving part (3) that can drive the convex lens (4) to move up and down, and a support part (2) that moves up and down synchronously is provided on one side of the moving part (3), and a support tube (21) is provided at the inner bottom of the support part (2), and a push rod (11) is slidably connected to the support tube (21), and a compression spring (10) is fixedly connected to the top of the push rod (11), and the compression spring (10) is compressed to keep the push rod (11) extending out of the support tube (21), and the length of the push rod (11) fully extending out of the support tube (21) is the same as the floating error allowed after the laser is focused by the convex lens (4).

2. A welding device for processing automobile parts according to claim 1, characterized in that: A rectangular hole is provided between the moving part (3) and the welding device (1) for the convex lens (4) to move up and down. Sealing rings (14) are respectively provided at the upper and lower ends of the rectangular hole and are embedded in the outer wall of the welding device (1). The sealing rings (14) are tightly fitted to the moving part (3).

3. The welding device for processing automobile parts according to claim 1, characterized in that: Both ends of the convex lens (4) are respectively provided with protruding blocks and are embedded in the inner wall of the moving part (3). The convex lens (4) can move synchronously with the moving part (3).

4. The welding device for processing automobile parts according to claim 1, characterized in that: The support member (2) is hollow inside, and is composed of a rectangular parallelepiped at the top and a cylinder at the bottom, which facilitates the passage of protective gas. A cylindrical air inlet (7) is provided at the top of the support member (2), and a welding wire tube (16) is provided below the support member (2) and is embedded in and passes through the interior of the support member (2) to facilitate the passage of the welding wire (8).

5. The welding device for processing automobile parts according to claim 4, characterized in that: The upward end of the welding wire tube (16) is connected to the wire feeding tube (17), one end of the support rod (9) is embedded in the interior of the welding wire tube (16), the bottom end of the support rod (9) is slidably connected to the support cylinder (21), the top end of the compression spring (10) contacts the bottom end of the support rod (9), and the upper end of the support rod (9) is a permanent magnetic material. The end of the inner wall of the welding wire tube (16) that contacts the support rod (9) is provided with a proximity switch sensor (15), and the proximity switch sensor (15) is used to indicate and control the wire feeder to feed the welding wire to the wire feeding tube.

6. The welding device for processing automobile parts according to claim 1, characterized in that: When the push rod (11) is supported on the surface of the workpiece to be welded in a normal state, a preset distance is provided between the bottom of the push rod (11) and the inner bottom of the support tube (21), the bottom end of the support tube (21) is flush with the bottom end of the support member (2), and the push rod (11) can be completely retracted into the support tube (21).

Images