Welding device for processing agricultural harvester screen

Abstract

The invention relates to the technical field of screen machining, in particular to a welding device for agricultural harvester screen machining, which comprises a welding table, a laser welding assembly is arranged in the welding table, the laser welding assembly comprises a rotary supporting block and laser welding gun heads symmetrically arranged on the rotary supporting block, and the rotary supporting block can rotate around the axis of the rotary supporting block. And reciprocating rotation at a certain angle is carried out in the welding table. According to the welding method, the laser welding gun head conducts 90-degree (multi-angle) rotary scanning around the intersection point, closed-loop welding of the overlapping position of the transverse rod and the longitudinal rod is achieved, and therefore inherent triangular gaps in a traditional spot welding process are thoroughly eliminated, and the straw hanging problem is fundamentally solved.

Description

Technical Field

[0001] This invention relates to the field of screen processing technology, and in particular to a welding device for processing screens for agricultural harvesters. Background Technology

[0002] Agricultural harvester screens are mainly used to separate straw from crops during the harvesting process. Currently, common screens are made of two thick metal strips welded together. However, with existing laser welding technology, triangular gaps are easily formed at the weld joint, causing straw to easily get stuck. This not only affects the screening efficiency of crops but also makes cleaning work inconvenient. Summary of the Invention

[0003] The purpose of this invention is to provide a welding device for processing screens in agricultural harvesters, so as to solve the above-mentioned technical problems.

[0004] To address the aforementioned problems, the present invention provides the following technical solution: A welding device for processing screens in agricultural harvesters includes a welding table, inside which a laser welding assembly is provided. The laser welding assembly includes a rotating support block and laser welding gun heads symmetrically arranged thereon. The rotating support block can reciprocate around its axis within the welding table at a certain angle.

[0005] Preferably, the outer surface of the rotating support block is provided with a bearing, and the bearing is mounted in the welding table by a bracket.

[0006] Preferably, the outer surface of the rotating support block is provided with teeth, which mesh with a gear, the gear is mounted on a drive motor, and the drive motor is mounted inside the welding station.

[0007] Preferably, the welding table is provided with sliding sleeves on both sides, the sliding sleeves are fitted onto the support rod, the support rod is provided with a support beam at the top, and a hydraulic rod is provided between the support beam and the welding table.

[0008] Preferably, the bottom of the support rod is set on the tooling table, and the tooling table is provided with a pad at the welding table.

[0009] Preferably, there are multiple laser welding components arranged at equal intervals on the welding table, with each laser welding component corresponding to a row of intersections on the screen.

[0010] Preferably, the welding table is further provided with multiple fume extraction and filtration components, each of which is disposed between adjacent laser welding components.

[0011] Preferably, the smoke exhaust filtration assembly includes a protective mesh, a filter element, a motor, and a fan blade disposed within the welding station. The protective mesh is disposed on the outer surface of the welding station, the motor is disposed within the welding station, and a fan blade is provided on its output shaft. A filter element is disposed between the motor and the protective mesh.

[0012] Preferably, when the gear rotates one revolution, the rotating support block rotates one-quarter revolution, and the drive motor is a servo motor.

[0013] Beneficial effects: Compared with the existing technology, the present invention achieves closed-loop welding at the intersection of crossbars and longitudinal bars by using a laser welding gun head to perform a 90° (multi-angle) rotational scanning around the intersection point, thereby completely eliminating the inherent "triangular gap" in the traditional spot welding process and fundamentally solving the problem of straw attachment. Attached Figure Description

[0014] Figure 1 This is a perspective view of one embodiment of the present invention.

[0015] Figure 2 This is a perspective view of a laser welding assembly in one embodiment of the present invention.

[0016] Figure 3 This is a perspective view of the laser welding assembly in the welding station in one embodiment of the present invention.

[0017] Figure 4 This is a front view of a laser welding assembly in one embodiment of the present invention.

[0018] Figure 5 This is a perspective view of a smoke extraction and filtration assembly in one embodiment of the present invention.

[0019] Figure 6 This is a comparison diagram of the welding effect of the screen in one embodiment of the present invention.

[0020] In the diagram: tooling table 101, pad 102, support rod 103, sliding sleeve 104, welding table 105, support beam 106, hydraulic rod 107; laser welding assembly 200, bracket 201, bearing 202, rotating support block 203, teeth 204, gear 205, drive motor 206, laser welding gun head 207; smoke exhaust filter assembly 300, protective net 301, filter sheet 302, motor 303, fan blade 304; crossbar 401, longitudinal bar 402, first welding point 403, second welding point 404. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0022] Reference Figures 1 to 6 An embodiment of the present invention provides a welding device for processing screens of agricultural harvesters, including a welding table 105. The welding table 105 is provided with a laser welding assembly 200. The laser welding assembly 200 includes a rotating support block 203 and laser welding gun heads 207 symmetrically arranged thereon. The rotating support block 203 can reciprocate around its axis within the welding table 105 at a certain angle.

[0023] Specifically, the outer surface of the rotating support block 203 is provided with a bearing 202, which is set in the welding table 105 through a bracket 201, enabling the rotating support block 203 to rotate axially. The outer surface of the rotating support block 203 is provided with teeth 204, which mesh with gears 205. The gears 205 are mounted on a drive motor 206, which is also mounted in the welding table 105, providing the power source for the rotating support block 203. Furthermore, when the gears 205 rotate one revolution, the rotating support block 203 rotates one-quarter revolution. The drive motor 206 is a servo motor. When the gears 205 of the drive motor 206 rotate one revolution, the laser welding gun head 207 of the rotating support block 203 can rotate 90° around the axis of the rotating support block 203. Under the clamping of the servo motor, the laser welding gun head 207 can complete the welding of the screen by reciprocating.

[0024] Figure 6 The image shows the laser welding status of two parts of the screen, in which... Figure 6 The upper part shows the effect of laser spot welding. After welding, there are obviously many triangular gaps. Figure 6 The following section describes the effect of laser welding in this embodiment. Specifically, the first weld 403 and the second weld 404 at the intersection of the crossbar 401 and the vertical bar 402 achieve a perfect closed loop, thereby eliminating the "triangular gap" and making the entire "intersection" protrude outward evenly, making it less likely for straw to stick, and also making it easier to clean the screen.

[0025] When the welding table 105, driven by the hydraulic rod 107, is guided vertically downwards via the sliding sleeve 104 onto the screen workpiece on the pad 102 of the tooling table 101, the laser welding gun head 207 starts and begins to rotate. Instead of performing static spot welding, it performs a dynamic scanning weld of 90° around the intersection of the crossbar 401 and the vertical bar 402, driven by a servo motor. After welding one side, the screen is flipped over, and the same process is repeated to form a second weld on the other side of the intersection.

[0026] It is through the aforementioned motion process based on a specific structure that the following is achieved: Figure 6 The effect shown is that two 90° rotating scanning welds in opposite directions together form a complete, seamless closed-loop weld (i.e., the first weld 403 and the second weld 404). This process completely eliminates the "triangular gaps" caused by insufficient fusion in traditional spot welding. At the same time, the uniform rotating scanning allows the molten metal to redistribute, ultimately forming a uniformly smooth, raised weld point. This geometry fundamentally eliminates the anchor points for straw attachment, significantly improving the screening efficiency of the screen during harvesting and making subsequent cleaning work extremely convenient.

[0027] The welding table 105 has sliding sleeves 104 on both sides, which are fitted onto the support rod 103. The top of the support rod 103 has a support beam 106, and a hydraulic rod 107 is provided between the support beam 106 and the welding table 105. The bottom of the support rod 103 is set on the tooling table 101, and the tooling table 101 is provided with a pad 102 corresponding to the welding table 105. There are multiple laser welding components 200, which are equally spaced on the welding table 105. Each laser welding component 200 corresponds to a row of intersections on the screen.

[0028] The welding working principle of this invention embodiment is as follows: The screen to be welded is placed on the pad 102 of the tooling table 101. The welding table 105 is driven downwards by the hydraulic rod 107 of the support beam 106. Under the constraint of the sliding sleeve 104, the welding table 105 moves vertically downwards, stopping near the desired welding position on the screen. The laser welding gun head 207 and the drive motor 206 are then activated, rotating the laser welding gun head 207 90° to weld the intersection of the horizontal bars 401 and vertical bars 402 of the screen. The screen is then flipped over and welded again to complete the process. Figure 6 The welding status of the lower part.

[0029] The welding table 105 is also equipped with multiple fume extraction and filtration components 300. Each fume extraction and filtration component 300 is disposed between adjacent laser welding components 200. Each fume extraction and filtration component 300 includes a protective mesh 301, a filter element 302, a motor 303, and a fan blade 304 disposed within the welding table 105. The protective mesh 301 is disposed on the outer surface of the welding table 105, and the motor 303 is disposed within the welding table 105, with the fan blade 304 mounted on its output shaft. The filter element 302 is disposed between the motor 303 and the protective mesh 301. The fume extraction and filtration component 300, driven by the motor 303 and the fan blade 304, generates suction that passes through the filter element 302, adsorbing the fumes generated during laser welding, reducing indoor air pollution, and achieving the effect of purifying the air while welding.

[0030] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A welding device for processing screens in agricultural harvesters, characterized in that: The assembly includes a welding table (105), which is equipped with a laser welding component (200). The laser welding component (200) includes a rotating support block (203) and a laser welding gun head (207) symmetrically arranged thereon. The rotating support block (203) can reciprocate around its axis within the welding table (105) at a certain angle.

2. The welding device for processing agricultural harvester screens as described in claim 1, characterized in that: The outer surface of the rotating support block (203) is provided with a bearing (202), and the bearing (202) is set in the welding table (105) through a bracket (201).

3. The welding device for processing agricultural harvester screens as described in claim 2, characterized in that: The outer surface of the rotating support block (203) is provided with teeth (204), which mesh with gears (205). The gears (205) are mounted on the drive motor (206), which is located inside the welding table (105).

4. The welding device for processing agricultural harvester screens as described in claim 1, characterized in that: The welding table (105) has sliding sleeves (104) on both sides, the sliding sleeves (104) are fitted on the support rod (103), the support rod (103) has a support beam (106) on the top, and a hydraulic rod (107) is provided between the support beam (106) and the welding table (105).

5. The welding device for processing agricultural harvester screens as described in claim 4, characterized in that: The bottom of the support rod (103) is set on the tooling table (101), and the tooling table (101) is provided with a pad (102) at the welding table (105).

6. The welding device for processing agricultural harvester screens as described in claim 1, characterized in that: The laser welding components (200) are multiple and are equally spaced on the welding table (105), with each laser welding component (200) corresponding to the intersection of a row on the screen.

7. The welding device for processing agricultural harvester screens as described in claim 6, characterized in that: The welding table (105) is also provided with a plurality of smoke exhaust filter components (300), each of the smoke exhaust filter components (300) being arranged between adjacent laser welding components (200).

8. The welding device for processing agricultural harvester screens as described in claim 7, characterized in that: The smoke exhaust filter assembly (300) includes a protective net (301), a filter (302), a motor (303), and a fan blade (304) disposed within a welding table (105). The protective net (301) is disposed on the outer surface of the welding table (105), the motor (303) is disposed within the welding table (105), and a fan blade (304) is provided on its output shaft. A filter (302) is disposed between the motor (303) and the protective net (301).

9. The welding device for processing agricultural harvester screens as described in claim 3, characterized in that: When the gear (205) rotates one revolution, the rotating support block (203) rotates one-quarter revolution, and the drive motor (206) is a servo motor.

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