Welding device for automobile part machining

Abstract

The invention relates to the technical field of welding devices, and discloses a welding device for automobile part machining, which comprises a welding device, a refraction lens arranged at the bending position in the welding device, a sealing lens arranged at the lowest end of the welding device and a convex lens arranged in the welding device, and the convex lens can move up and down. The welding device is movably sleeved with a moving part capable of driving the convex lens to move up and down, a supporting part synchronously moving up and down is arranged on one side of the moving part, a supporting cylinder is arranged at the inner bottom of the supporting part, an ejector rod is slidably connected into the supporting cylinder, and a compression spring is fixedly connected to the top end of the ejector rod. The compression spring is pressed to be used for keeping the ejector rod to stretch out of the supporting cylinder, the length of the ejector rod stretching out of the supporting cylinder completely is the same as the allowable floating error after laser is condensed through the convex lens, and a laser welding point can be stabilized at the bottom of the supporting piece all the time according to synchronous movement of the supporting piece, the moving piece and the convex lens. And the optimal welding effect is achieved 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 the existing laser welding technology, the laser welding point (laser convergence point) needs to be manually adjusted. Laser can harm 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 robotic arm's welding point 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, the spare parts will be crushed 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. There are some parts with larger welds that 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 cost 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 scheme: a welding device for processing automobile parts, comprising a welding device, a moving part and a supporting part, each bending position above the inside of the welding device is provided with a refractive lens completely embedded in the welding device, the lower end of the welding device is provided with an embedded sealing lens, a convex lens that can move up and down is provided below the welding device, a rectangular hole is provided 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 supporting part, a cylindrical air inlet is provided at the top of the supporting part, a welding wire tube embedded in and running through the inside of the supporting part is provided below the supporting 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 supporting part, the compression spring is embedded in the top rod, and the lower end of the supporting part close to the welding point is provided with a cylindrical air outlet.

[0006] Furthermore, a rectangular hole is provided between the moving part and the welding device, and sealing rings are respectively 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 moving part.

[0007] The rectangular hole facilitates the up and down movement of the convex lens. Both ends of the convex lens are respectively provided with protruding blocks which are 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 so as to adjust the welding point.

[0008] Furthermore, a welding wire tube is embedded inside 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 that is 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 with the push rod, and the support rod will also drop. The proximity switch sensor detects the signal that the support rod is leaving, which will instruct the wire feeder to perform 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 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. The upward and downward movement of a push rod drives the upward and downward movement of a support 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 a 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 in 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 a welding wire tube. According to the up and down movement of a support rod, it is determined whether wire feeding is required for the current weld size, thereby controlling the timing of wire feeding and realizing 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 drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the provided drawings without creative 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. refracting 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 be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0022] like Figure 1 As shown, a variety of lenses are arranged inside the welding device 1, namely a refractive lens 6, a convex lens 4 and a sealing lens 5 (there are many other lenses in the prior art that are not shown in the present invention). When the laser light is refracted onto the convex lens 4 by the light refractive lens 6, the laser light will be focused at one point according to the principle of focusing 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 can be reached to melt, and welding can begin.

[0023] like Figure 1 and Figure 3As shown, a moving part 3 is sleeved on the outer wall of the welding device 1, 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 is tightly fitted 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 convex lens 4 to move up and down 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 with 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 keep the curvature of the surface of the spare part at a position that can fluctuate up and down and allow for floating errors. 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 work starts, the air inlet 7 above the support member 2 will supply gas to the inside of the support member 2 from the protective gas cylinder, 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 protective 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, 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 control end of the wire feeder, 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 a 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 the present 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 welded part, the compression spring 10 is compressed. Figure 2 As shown, at this time, the elastic force generated by the compression will lift the support rod 9 just 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 down. The compression of the compression spring 10 is not enough to lift the support rod 9, so that the support rod 9 also falls synchronously, and the relative proximity sensor 15 will appear to move away.

Claims

1. A welding device for processing automobile parts, comprising a welding device (1), a refractive lens (6) arranged at a bending position in the welding device (1), a sealing lens (5) arranged at the bottom of the welding device (1), and a convex lens (4) arranged in the welding device (1), characterized in that: The convex lens (4) can move up and down, and the external 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 can move 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 inside 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) protruding out of the support tube (21), and the length of the push rod (11) fully protruding 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 automobile parts processing 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 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 ring (14) is tightly fitted to the moving part (3).

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

4. A welding device for automobile parts processing 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, so as to facilitate 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 penetrates the interior of the support member (2) to facilitate the passage of the welding wire (8).

5. A welding device for automobile parts processing according to claim 4, characterized in that: The upward end of the welding wire tube (16) is connected to a wire feeding tube (17), one end of a 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 tube (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). The proximity switch sensor (15) is used to indicate and control the wire feeder to feed welding wire to the wire feeding tube.

6. A welding device for automobile parts processing 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).

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