A semi-automatic welding machine for thin plates and cylindrical parts

Abstract

This invention discloses a semi-automatic welding machine for thin plates and cylindrical parts, including a welding torch and a clamp. The clamp has two opposing clamping arms, and the two ends of the cylinder are clamped between the two clamping arms. A lifting assembly connected to the clamp is included, with a heat-conducting component and a positive pressure component sequentially arranged at the lower end of the lifting assembly. The lower surface of the positive pressure component is an arc surface. The lifting assembly drives the heat-conducting component and the positive pressure component to press the thin plate tightly against the outer surface of the cylinder, thereby making the welding edge of the thin plate adhere closely to the outer surface of the cylinder. A moving assembly is included, with the welding torch mounted on the moving assembly. The moving assembly drives the welding torch to move along the welding edge. This invention solves the technical problem of the welding edges not being able to adhere properly. Furthermore, by using the moving assembly to drive the welding torch along the welding edge to complete automatic continuous welding, the probability of welding quality problems such as weld porosity and cracks is greatly reduced. The weld is uniform, the welding time is short, and the efficiency is high.

Description

Technical Field

[0001] This invention belongs to the field of semi-automatic welding machine technology, specifically relating to a semi-automatic welding machine for thin plates and cylindrical parts. Background Technology

[0002] For conventional welding of ultra-thin plates and other ultra-thin parts, welding methods such as argon arc welding, laser welding, and roll welding are commonly selected. For example, when welding two thin plates, the two plates are overlapped and aligned with the two sides to be welded. Because the two sides to be welded naturally come close together after the two thin plates are overlapped, the welding difficulty is low and manual welding can be performed.

[0003] However, welding is difficult and prone to quality problems for workpieces where the weld edges cannot naturally adhere or cannot be adhered even using conventional fixtures. For example, ultra-thin plates of 0.2mm, 0.1mm, or even thinner are bent and welded to the outer surface of a cylinder. However, the stress present after bending the thin plate prevents the welded edge from completely adhering to the outer surface of the cylinder. Furthermore, to meet the sealing requirements of the workpiece, spot welding cannot be used; only continuous welding is possible. Where the edges are not tightly adhered, welding quality problems such as porosity and cracks are highly likely to occur.

[0004] To address the aforementioned issues, there are currently no dedicated automatic or semi-automatic welding machines for thin plates and cylindrical parts. Designing a dedicated welding machine for a specific size of cylinder and corresponding thin plate would lack versatility and be too costly. Using conventional tools such as clamps and clamps makes it difficult to ensure complete adhesion of every edge to be welded, and even if complete adhesion is achieved, it is time-consuming and severely impacts welding efficiency. Therefore, there is a lack of a versatile automatic or semi-automatic welding machine suitable for thin plates and cylindrical parts. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a semi-automatic welding machine for thin plates and cylindrical components, including a welding torch and a clamp. The clamp has two opposing clamping arms, with both ends of the cylinder clamped between the two clamping arms. A lifting assembly connected to the clamp is included, with a heat-conducting component and a positive pressure component sequentially arranged at the lower end of the lifting assembly. The lower surface of the positive pressure component is an arc surface. The lifting assembly drives the heat-conducting component and the positive pressure component to press the thin plate tightly against the outer surface of the cylinder, thereby ensuring that the welding edge of the thin plate is close to the outer surface of the cylinder. A moving assembly is included, with the welding torch mounted on it. The moving assembly drives the welding torch to move along the welding edge.

[0006] The preferred embodiment of the semi-automatic welding machine for thin plates and cylindrical parts in this invention is as follows: the clamp includes a horizontal arm, with two clamping arms respectively installed at both ends of the horizontal arm, and the distance between the two clamping arms is adjustable. A sliding groove is provided on the horizontal arm, and the upper ends of the clamping arms are slidably connected to the sliding groove. The distance between the two clamping arms can be adaptively adjusted according to the axial length of the cylinder, thus making the clamp suitable for cylinders of different lengths, combining specialization and versatility.

[0007] The preferred embodiment of the semi-automatic welding machine for thin plates and cylindrical parts in this invention is as follows: the lifting assembly includes two pre-tightening screws and at least one locking screw. Both pre-tightening screws and all locking screws are connected to the cross arm via threads, and the lower ends of all locking screws face the heat-conducting component. The two pre-tightening screws are located near both ends of the cross arm, and all locking screws are positioned between the two pre-tightening screws. Further, a spring is provided between the lower end of each pre-tightening screw and the heat-conducting component. The lower end of each spring is fixedly connected to the heat-conducting component, and the upper end is rotatably connected to the corresponding pre-tightening screw. The thin plate rests on the outer surface of the cylinder. First, the two pre-tightening screws pre-tighten both sides of the thin plate. Then, the position of the thin plate is precisely adjusted. Finally, the locking screws lock the adjusted position of the thin plate, thereby achieving rapid locking of the thin plate position and reducing the positioning workload in the pre-welding stage.

[0008] A preferred embodiment of the semi-automatic welding machine for thin plates and cylindrical parts in this invention is as follows: the heat-conducting component is provided with a cooling channel, and the positive pressure component is fixedly connected to the lower surface of the heat-conducting component. The positive pressure component includes an arc-shaped bottom wall and a corrugated top wall, forming a cavity between the arc-shaped bottom wall and the corrugated top wall. The elastic modulus of the corrugated top wall, the elastic modulus of the arc-shaped bottom wall, and the elastic modulus of the thin plate decrease sequentially. The cavity is filled with a heat-conducting agent, and the lower surface of the heat-conducting component penetrates the corrugated top wall and extends into the cavity. The lower surface of the heat-conducting component is provided with multiple inclined downward extending heat-conducting support plates close to the arc-shaped bottom wall. On the one hand, the cooling channel of the heat-conducting component is connected to an external cooling device, and the coolant of the cooling device flows through the cooling channel. A large amount of heat generated during the welding process is carried away by the coolant, thereby effectively preventing thermal stress deformation of the thin plate due to slow heat dissipation and improving weld quality. On the other hand, the positive pressure component can press the edge of the thin plate to be welded against the outer surface of the cylinder through deformation, effectively solving the problem of the edge to be welded not fitting together.

[0009] The preferred embodiment of the semi-automatic welding machine for thin plates and cylindrical parts in this invention is as follows: the heat-conducting component is rectangular in shape, with its length parallel to the horizontal arm. The heat-conducting component has a groove extending along its length and a T-shaped limiting groove. Two grooves are provided, located on the upper surface and side surface of the heat-conducting component, respectively, and the T-shaped limiting groove is located between the two grooves. The moving assembly has a T-shaped limiting rod adapted to the T-shaped limiting groove, and a drive wheel and a driven wheel adapted to the two grooves, respectively. After the thin plate is positioned and locked, the moving assembly is installed. Finally, the moving assembly drives the welding torch to move from one end of the thin plate to be welded to the other end, completing the automatic welding. Compared to manual welding, automatic welding produces neater welds with better weld quality consistency.

[0010] The beneficial effects of the semi-automatic welding machine for thin plates and cylindrical parts in this invention are as follows:

[0011] 1. The welding edge of the thin plate is pressed against the outer surface of the cylindrical part by a clamp. The clamp can be adjusted according to the axial length of the cylindrical part. It can be used for cylindrical parts of different lengths and welding edges of thin plates of different lengths. This solves the problem that the thin plate and the cylindrical part cannot be brought close together, and also solves the technical problem that a single welding machine cannot be used for cylindrical parts and thin plates of various sizes.

[0012] 2. The fixture solves the technical problem of the edges to be welded not fitting together. Then, the moving component drives the welding gun to complete automatic continuous welding along the edges to be welded, which greatly reduces the probability of welding quality problems such as welding porosity and cracks. The weld is uniform, the welding time is short, and the efficiency is high. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of the semi-automatic welding machine for thin plates and cylindrical parts in this invention;

[0015] Figure 2 for Figure 1 Sectional view of AA;

[0016] Figure 3 for Figure 1 The right view;

[0017] Figure 4 for Figure 1 A three-dimensional image.

[0018] Reference numerals: 1. Welding torch; 2. Clamping arm; 3. Horizontal arm; 4. Slot; 5. Heat-conducting component; 6. Positive pressure component; 7. Pre-tightening screw; 8. Locking screw; 9. Spring; 10. Arc-shaped bottom wall; 11. Corrugated top wall; 12. Cavity; 13. Heat-conducting support plate; 14. Cooling channel; 15. Moving component; 16. Groove; 17. T-shaped limiting groove; 18. Bending shaping strip; 19. Thin plate; 20. Cylinder; 21. Drive wheel; 22. Driven wheel; 23. T-shaped limiting rod. Detailed Implementation

[0019] In view of the shortcomings of the prior art, the inventors of this invention, through long-term research and extensive practice, have proposed the technical solution of this invention. The technical solution, its implementation process, and principles will be further explained below with reference to the accompanying drawings and specific implementation examples in the embodiments of this application.

[0020] like Figure 4 As shown, this embodiment provides a semi-automatic welding machine for thin plates and cylindrical parts, including a welding torch 1, a fixture, and a welding machine connected to the welding torch 1. The welding machine is not shown in the figure. This embodiment does not limit the type of welding machine; any welding machine suitable for welding thin plates 19 is acceptable.

[0021] The specific structure of the fixture in this embodiment is as follows:

[0022] like Figure 1 and Figure 3 As shown, the clamp has two opposing clamping arms 2 and a horizontal arm 3. The two clamping arms 2 are respectively installed at both ends of the horizontal arm 3, and the distance between the two clamping arms 2 is adjustable. A sliding groove is provided on the horizontal arm 3, and the upper end of the clamping arm 2 is slidably connected to the sliding groove. The distance between the two clamping arms 2 can be adaptively adjusted according to the axial length of the cylinder 20, thus making the clamp suitable for cylinders 20 of different lengths, combining specialization and versatility. Furthermore, each clamping arm 2 is provided with a slot 4 that matches the end of the cylinder 20, that is, the two ends of the cylinder 20 are correspondingly engaged in the two slots 4, thereby clamping the two ends of the cylinder 20 between the two clamping arms 2.

[0023] After the cylinder 20 is fixed by the clamping arm 2, the thin plate 19 is then fixed in the following manner:

[0024] A lifting assembly is provided on the cross arm 3. At the lower end of the lifting assembly are a heat-conducting element 5 and a positive pressure element 6, with the lower surface of the positive pressure element 6 being an arc surface. The lifting assembly drives the heat-conducting element 5 and the positive pressure element 6 to press the thin plate 19 tightly against the outer surface of the cylinder 20, thereby making the welded edge of the thin plate 19 adhere tightly to the outer surface of the cylinder 20. Specifically, the lifting assembly includes two pre-tightening screws 7 and three locking screws 8, which are distributed at equal intervals. The two pre-tightening screws 7 and all the locking screws 8 are connected to the cross arm 3 by threads, and the lower ends of all the locking screws 8 are directly opposite the heat-conducting element 5. The two pre-tightening screws 7 are located near both ends of the cross arm 3, and all the locking screws 8 are located between the two pre-tightening screws 7. Further, a spring 9 is provided between the lower end of each pre-tightening screw 7 and the heat-conducting element 5. The lower end of each spring 9 is fixedly connected to the heat-conducting element 5, and the upper end is rotatably connected to the corresponding pre-tightening screw 7. The thin plate 19 rests on the outer surface of the cylinder 20. First, the two sides of the thin plate 19 are pre-tightened using two pre-tightening screws 7. Then, the position of the thin plate 19 is precisely adjusted. Finally, the adjusted position of the thin plate 19 is locked by the locking screw 8, thereby achieving rapid locking of the thin plate 19 and reducing the amount of positioning work in the early stage of welding.

[0025] Because the diameters of the cylinders 20 vary, the curvature of their outer surfaces also differs. To ensure that the positive pressure component 6 matches most cylinders 20, the structure of the positive pressure component 6 is optimized in this embodiment as follows:

[0026] like Figure 2 As shown, the positive pressure component 6 includes an arc-shaped bottom wall 10 and a corrugated top wall 11, forming a sealed cavity 12 between the arc-shaped bottom wall 10 and the corrugated top wall 11, thus giving the cross-sectional shape of the positive pressure component 6 a fan shape. Both the arc-shaped bottom wall 10 and the corrugated top wall 11 of the positive pressure component 6 can deform, and the elastic modulus of the corrugated top wall 11, the arc-shaped bottom wall 10, and the thin plate 19 decrease sequentially. The purpose of limiting the elastic modulus is that after the thin plate 19 is placed on the outer surface of the cylinder 20, the arc-shaped bottom wall 10 first contacts the thin plate 19. Since the elastic modulus of the arc-shaped bottom wall 10 is greater than that of the thin plate 19, the deformation of the arc-shaped bottom wall 10 allows the thin plate 19 to adhere to the outer surface of the cylinder 20. The deformation of the thin plate 19 is greater than that of the arc-shaped bottom wall 10, thus making it suitable for cylinders 20 of different diameters, forming a universal bonding tool. While the curved bottom wall 10 deforms, the corrugated top wall 11 also deforms to a certain extent. The deformation of the corrugated top wall 11 is to adapt to the deformation of the curved bottom wall 10. The deformation of the curved bottom wall 10 is to fit the outer surface of the cylinder 20 with different diameters. The corrugated top wall 11 has the largest elastic modulus. The deformation of the corrugated top wall 11 not only conforms to the deformation of the curved bottom wall 10, but also supports the curved bottom wall 10. This prevents the corrugated top wall 11 from being too soft, which would result in insufficient support for the curved bottom wall 10 and prevent the curved bottom wall 10 from being unable to fit completely against the outer surface of the cylinder 20.

[0027] In this embodiment, the positive pressure component 6 not only serves to bond the positive pressure plate 19 to the cylinder 20, but also possesses high thermal conductivity. The positive pressure component 6 itself is made of a high thermal conductivity material, and a thermally conductive agent is filled in the cavity 12. This agent can be a liquid metal to increase positive pressure, or it can be a synthetic thermal grease, etc. The cavity 12 is simply filled with the thermally conductive agent. Furthermore, the lower surface of the thermally conductive component 5 penetrates the corrugated top wall 11 and extends into the cavity 12. The lower surface of the thermally conductive component 5 has six inclined, downward-extending thermally conductive support plates 13 close to the arc-shaped bottom wall 10. Three of these support plates face one side of the cavity 12, and the other three face the other side. The thermally conductive support plates 13 significantly increase the thermal conductivity area, rapidly absorbing and transferring the heat from the thermally conductive agent to the thermally conductive component 5. The heat-conducting support plate 13 can deform elastically, which provides a certain support for the arc-shaped bottom wall 10, making the positive pressure effect of the arc-shaped bottom wall 10 on the thin plate 19 better, and the fit between the thin plate 19 and the cylinder 20 better.

[0028] To prevent the heat generated during welding from causing thermal stress deformation of the thin plate 19, the heat-conducting component 5 is provided with three cooling channels 14. The three cooling channels 14 of the heat-conducting component 5 are connected to external cooling equipment. The coolant of the cooling equipment flows through the cooling channels 14, and the large amount of heat generated during welding is carried away by the coolant, thereby effectively preventing the thin plate 19 from undergoing thermal stress deformation due to slow heat dissipation, which is beneficial to improving the weld quality.

[0029] like Figure 3 and Figure 4 As shown, in order to improve the weld quality and avoid uneven welds caused by manual welding, this embodiment also includes a moving component 15. The welding torch 1 is mounted on the moving component 15, and the moving component 15 drives the welding torch 1 to move along the welding edge. Specifically, the heat-conducting component 5 is rectangular in shape, and its length direction is parallel to the horizontal arm 3. The heat-conducting component 5 is provided with a groove 16 extending along its length direction and a T-shaped limiting groove 17. There are two grooves 16, which are located on the upper surface and the side surface of the heat-conducting component 5, respectively. The T-shaped limiting groove 17 is located between the two grooves 16. The moving component 15 is provided with a T-shaped limiting rod 23 adapted to the T-shaped limiting groove 17, and a drive wheel 21 and a driven wheel 22 adapted to the two grooves 16, respectively. During the welding process, the moving component 15 is driven to move by the drive wheel 21, and the component drives the welding torch 1 to move from one end of the edge to be welded on the thin plate 19 to the other end.

[0030] This embodiment also provides a semi-automatic welding method for the thin plate 19 and the cylindrical piece 20, as follows:

[0031] S1. Workpiece positioning:

[0032] S101. Adjust the distance between the two clamping arms 2 according to the axial length of the cylinder 20. The length of the cross arm 3 must be greater than the axial length of the cylinder 20.

[0033] S102. The slots 4 of the two clamping arms 2 are used to clamp the two ends of the cylinder 20 (the cylinder 20 is a hollow structure with circular cross-sections at both ends);

[0034] S103. Place the thin plate 19 on the outer surface of the cylinder 20 with the thin plate 19 below the positive pressure component 6. First, use the two pre-tightening screws 7 to pre-tighten both sides of the thin plate 19. Then, adjust the position of the thin plate 19 so that the edge of the thin plate 19 is aligned and coincides with the welding edge on the outer surface of the cylinder 20. Finally, screw down the three locking screws 8 to tighten and lock the final position of the thin plate 19.

[0035] If misalignment occurs during the above adjustment process, the pre-tightening screw 7 can be lifted (i.e., overcoming the spring force of spring 9) to release one side of the thin plate 19. After readjustment, the lifted pre-tightening screw 7 can be released and pre-tightened again. If the other side of the thin plate 19 is not aligned, adjust the other side in the same way until both sides are aligned. However, the edge of the thin plate 19 needs to extend beyond the edge of the positive pressure component 6 to leave room for welding.

[0036] S2, Automatic Welding:

[0037] S201. Insert the T-shaped limiting rod 23 of the moving component 15 into the T-shaped limiting groove 17. Simultaneously, place the drive wheel 21 and driven wheel 22 in the two grooves 16 respectively. Connect the welding torch 1 to the welding machine. Then, install the welding torch 1 at the end of the bending shaping strip 18 on the moving component 15. Manually adjust the bending shaping strip 18 so that the welding torch 1 is aligned with the edge to be welded between the thin plate 19 and the cylinder 20. The bending shaping strip 18 can be bent arbitrarily and maintain its bent shape. The bending shaping strip 18 can adopt a combination structure of PVC / film and metal shaping wire. This structure is existing technology and will not be described in detail in this embodiment.

[0038] S202, the speed of the drive wheel 21 is set appropriately, the welding machine is turned on, and the welding torch 1 moves along the edge to be welded to complete the welding.

[0039] Compared to manual welding, automatic welding produces neater welds with better consistency in quality, greatly reducing the probability of welding quality problems such as porosity and cracks. It also results in uniform welds, shorter welding time, and higher efficiency.

[0040] It should be understood that the above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. It should not be considered that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A semi-automatic welding machine for thin plates and cylindrical parts, comprising a welding torch; characterized in that: Includes a clamp, which has two opposing clamping arms, with both ends of the cylinder clamped between the two clamping arms; It includes a lifting assembly connected to the clamp. The lower end of the lifting assembly is provided with a heat-conducting component and a positive pressure component in sequence. The lower surface of the positive pressure component is an arc surface. The lifting assembly drives the heat-conducting component and the positive pressure component to press the thin plate tightly against the outer surface of the cylinder, thereby making the welded edge of the thin plate adhere tightly to the outer surface of the cylinder. Includes a moving component, wherein the welding torch is mounted on the moving component and the moving component drives the welding torch to move along the welding edge; The clamp includes a horizontal arm, with two clamping arms respectively mounted at both ends of the horizontal arm and the distance between the two clamping arms being adjustable. The lifting assembly includes two pre-tightening screws and at least one locking screw. The two pre-tightening screws and all the locking screws are connected to the cross arm by threads, and the lower end of all the locking screws is directly opposite the heat-conducting component. The two pre-tightening screws are respectively close to both ends of the cross arm, and all the locking screws are located between the two pre-tightening screws.

2. The semi-automatic welding machine for thin plates and cylindrical parts according to claim 1, characterized in that: Each preload screw has a spring between its lower end and the heat-conducting component. The lower end of each spring is fixedly connected to the heat-conducting component, and its upper end is rotatably connected to the corresponding preload screw.

3. The semi-automatic welding machine for thin plates and cylindrical parts according to claim 2, characterized in that: Each clamping arm is equipped with a slot that fits the end of the cylinder.

4. A semi-automatic welding machine for thin plates and cylindrical parts according to claim 3, characterized in that: The heat-conducting component is provided with a cooling channel, and the positive pressure component is fixedly connected to the lower surface of the heat-conducting component.

5. A semi-automatic welding machine for thin plates and cylindrical parts according to claim 4, characterized in that: The positive pressure component includes an arc-shaped bottom wall and a corrugated top wall, forming a cavity between the arc-shaped bottom wall and the corrugated top wall. The elastic modulus of the corrugated top wall, the elastic modulus of the arc-shaped bottom wall, and the elastic modulus of the thin plate decrease sequentially.

6. A semi-automatic welding machine for thin plates and cylindrical parts according to claim 5, characterized in that: The cavity is filled with a thermally conductive agent, and the lower surface of the thermally conductive component penetrates the corrugated top wall and extends into the cavity. The lower surface of the thermally conductive component is provided with a plurality of inclined, downward-extending thermally conductive support plates close to the arc-shaped bottom wall.

7. A semi-automatic welding machine for thin plates and cylindrical parts according to claim 6, characterized in that: The heat-conducting component is rectangular in shape, with its length parallel to the horizontal arm. The heat-conducting component has a groove and a T-shaped limiting groove extending along its length. There are two grooves, located on the upper surface and side surface of the heat-conducting component, respectively, and the T-shaped limiting groove is located between the two grooves. The moving component has a T-shaped limiting rod adapted to the T-shaped limiting groove, as well as a drive wheel and a driven wheel adapted to the two grooves, respectively.

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