Multi-welding-wire partition synchronous surfacing equipment and thermal deformation restraining method thereof

Abstract

The invention relates to multi-welding-wire partition synchronous surfacing equipment and a thermal deformation restraining method thereof, and aims to solve the technical problem that a plurality of welding guns synchronously work in adjacent or close partitions, a local ultrahigh temperature field can be formed, and thermal deformation of a workpiece is caused, the multi-welding-wire partition synchronous surfacing equipment comprises a sliding rail, and a sliding frame is slidably mounted on the outer side of the sliding rail; an adjusting mechanism is arranged on the front face of the sliding frame, a heat dissipation mechanism is arranged on the front face of the adjusting mechanism, and a welding gun body is arranged at the bottom of the adjusting mechanism. The motor drives the threaded rod to drive the adjusting frame to move, accurate linkage adjustment of spatial distribution of multiple welding guns is achieved, the problem of gathering of multiple heat sources is fundamentally solved, accumulation of heat in the space is effectively dispersed, it is avoided that the heat sources are concentrated at one point, and spatial distribution of the welding heat sources on a workpiece is dispersed; therefore, the technical problem that in the prior art, a plurality of welding guns synchronously work in adjacent or close subareas, a local ultrahigh temperature field can be formed, and thermal deformation of workpieces is caused is solved.

Description

Technical Field

[0001] This invention relates to the field of surfacing equipment technology, and in particular to a multi-wire zoned synchronous surfacing equipment and its method for suppressing thermal deformation. Background Technology

[0002] Hardfacing, as an important surface engineering technology, is widely used in machinery manufacturing, metallurgy, energy, chemical industry and other fields. Its main purpose is to clad one or more layers of alloy materials with specific properties (such as wear resistance, corrosion resistance, high temperature resistance, etc.) onto the surface of a workpiece to repair parts that have failed due to wear, corrosion or machining errors, or to directly manufacture bimetallic structural parts with composite properties (such as rolls, valve sealing surfaces, excavator bucket teeth, etc.). Compared to replacing the entire workpiece, hardfacing technology has significant economic benefits and resource-saving advantages.

[0003] However, in practical applications, especially in suppressing welding thermal deformation, the mechanical structure design of existing equipment has significant limitations. Existing equipment typically rigidly fixes multiple welding torches on a shared, compact beam or rigid support, with small and often non-adjustable physical spacing between the torches. When multiple torches work synchronously in adjacent or nearby zones, the enormous heat generated is highly concentrated in space, forming a localized ultra-high temperature field. This dense heat input causes a sharp rise in temperature in localized areas of the workpiece, resulting in severe and uneven thermal expansion. This easily leads to significant torsional deformation, angular deformation (such as side bending), or wavy deformation on the workpiece, expanding the high-temperature area and widening the heat-affected zone, potentially affecting the performance of the base material and the weld overlay. Therefore, we propose a multi-wire zoned synchronous weld overlay equipment and its thermal deformation suppression method. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art, adapt to practical needs, and provide a multi-wire zoned synchronous surfacing welding device and its thermal deformation suppression method to solve the technical problem that when multiple welding guns work synchronously in adjacent or close zones, a local ultra-high temperature field is formed, leading to thermal deformation of the workpiece.

[0005] To achieve the objectives of this invention, the technical solution adopted is as follows: a multi-wire zoned synchronous surfacing welding device and its thermal deformation suppression method, comprising: a slide rail, a sliding frame slidably mounted on the outer side of the slide rail, an adjustment mechanism provided on the front of the sliding frame, a heat dissipation mechanism provided on the front of the adjustment mechanism, and a welding gun body provided at the bottom of the adjustment mechanism; the adjustment mechanism includes an adjustment frame and a guide groove formed on its surface; a support column slidably mounted on the inner side of the sliding frame; a limiting column slidably assembled in the guide groove; honeycomb holes provided inside the support column to block the heat generated by the welding gun body from being conducted to the top of the support column; the heat dissipation mechanism includes multiple heat dissipation fins with periodic corrugated surfaces whose extension direction forms a small angle of attack with the natural airflow direction.

[0006] Preferably, the adjustment mechanism further includes a motor, which is fixedly mounted on the front of the sliding frame. A threaded rod is fixedly mounted on the output end of the motor, and the adjustment frame is threaded onto the outside of the threaded rod. A guide column is fixedly mounted on the front of the sliding frame. The welding gun body is assembled at the bottom of the support column via a welding bracket.

[0007] Preferably, the adjusting frame is slidably mounted on the outside of the guide column, and the adjusting frame moves axially along the guide column through the guide hole; the limiting column is fixedly mounted on the back of the support column.

[0008] Preferably, the heat dissipation mechanism further includes a heat absorption plate, which is fixedly installed inside the support column. A heat-conducting copper pipe is fixedly installed on the front side of the heat absorption plate, and a heat-conducting plate is fixedly installed at the end of the heat-conducting copper pipe away from the heat absorption plate.

[0009] Preferably, the heat dissipation fin array is distributed on the surface of the heat-conducting plate; an air guide duct is fixedly installed on the air inlet side of the heat-conducting plate, and an air guide plate is fixedly installed inside the air guide duct.

[0010] Preferably, the air inlet side of the first air duct is tapered and expanding, while the air outlet side is constricted and narrow; the air outlet side of the first air duct and the second air duct are fixedly installed through a sealing flange to form a collecting air duct.

[0011] Preferably, the air guide plate is an arc-shaped curved surface that protrudes towards the heat dissipation fins to form an accelerating airflow channel; the air guide plate is disposed at one outlet of the air guide pipe to concentrate and guide the airflow to the surface of the heat dissipation fins.

[0012] A method for suppressing thermal deformation in a multi-wire zoned synchronous surfacing welding device includes the following steps: S100, Adjusting the Spacing: Start the motor, and the motor output will drive the threaded rod to rotate, which in turn will drive the adjusting frame, which is installed on the outside of the threaded rod, to move downward under the guidance of the guide column. This will allow the support column to be adjusted inside the guide groove opened in the adjusting frame, so that the spacing between the welding gun bodies set at the bottom of the support column is adjusted. S200, heat conduction suppression: During the welding operation, the heat generated by the welding gun body enters the support column. First, the honeycomb holes inside the support column reduce heat conduction and heat convection, thereby improving the heat insulation capacity. The residual axial heat is captured by the heat absorption plate and transported in a directional manner to the heat conduction plate away from the heat source through the heat conduction copper pipe. After the heat absorption plate absorbs the heat, it is conducted to the heat conduction plate through the heat conduction copper pipe, and the heat dissipation fins perform the heat dissipation operation. S300, Airflow Enhancement: Natural airflow is collected, constrained, and guided by air duct 2 to efficiently pass through the heat dissipation fin area. After being guided by air duct 2, the natural airflow passes through air duct 1 and is then concentrated and guided by the air guide plate to the central area of ​​the convergence inlet, i.e., the heat dissipation fin area. This increases the heat dissipation efficiency of the heat dissipation fins, thereby reducing the temperature in this area, reducing the temperature gradient and thermal deformation along the length of the column, and maintaining its dimensional stability.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention uses a motor-driven threaded rod to move the adjusting frame, forcing the limiting column to slide synchronously along the guide groove. This achieves precise linkage adjustment of the spatial distribution of multiple welding torches, fundamentally solving the problem of multiple heat source accumulation. It effectively disperses the accumulation of heat in space, avoiding concentration at a single point, and disperses the spatial distribution of welding heat sources on the workpiece, reducing local heat density and eliminating the cause of thermal deformation from the source. The honeycomb holes and hexagonal structure inside the support column achieve an extremely high surface area-to-volume ratio, meaning that each heat conduction path is separated by more air. This solves the technical problem in existing technologies where multiple welding torches working synchronously in adjacent or nearby zones create a local ultra-high temperature field, leading to thermal deformation of the workpiece.

[0014] This invention blocks part of the radial heat flow through honeycomb holes, combined with gradient heat dissipation, from the heat-absorbing plate to the heat-conducting copper pipe to the heat dissipation fins. It can quickly capture residual axial heat and direct the heat away from the sensitive area, converting the heat into controllable thermal radiation release. The air inlet side of the first air duct is conical and expanding, while the air outlet side is constricted and narrow. The air outlet side of the first air duct and the second air duct are fixedly installed through a sealing flange to form a collecting air channel. The arc-shaped convex surface of the air guide plate concentrates and guides the airflow to the central area of ​​the converging inlet, blowing it towards the heat dissipation fins. The heat dissipation fins have a periodic corrugated curved surface, and their extension direction forms a small angle of attack with the natural airflow direction, which helps to guide the airflow to penetrate deeper into the interior of the fin assembly, reducing dead zones in corners and the bottom layer, and improving the overall fin utilization rate. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall appearance and structure of the present invention; Figure 2 This is a schematic diagram of the back structure of the present invention; Figure 3 This is a schematic cross-sectional view of the adjustment mechanism of the present invention; Figure 4 This is a schematic diagram of the guide groove and its related structures of the present invention; Figure 5 This is a schematic diagram of the external structure of the heat dissipation mechanism of the present invention; Figure 6This is a schematic diagram of the air duct and its related structures according to the present invention.

[0016] In the diagram: 1. Slide rail; 2. Adjustment mechanism; 21. Motor; 22. Threaded rod; 23. Adjustment frame; 24. Guide slide; 25. Support column; 26. Honeycomb hole; 27. Guide column; 28. Limiting column; 3. Heat dissipation mechanism; 31. Heat absorption plate; 32. Heat-conducting copper pipe; 33. Heat-conducting plate; 34. Heat dissipation fins; 35. Air duct one; 36. Air duct two; 37. Air guide plate; 4. Sliding frame; 5. Welding gun body. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments: Example 1: A multi-wire zoned synchronous surfacing welding device, see [link / reference] Figures 1 to 6 A multi-wire zoned synchronous cladding welding device includes: a slide rail 1, a sliding frame 4 slidably mounted on the outer side of the slide rail 1, an adjustment mechanism 2 on the front of the sliding frame 4, a heat dissipation mechanism 3 on the front of the adjustment mechanism 2, and a welding gun body 5 at the bottom of the adjustment mechanism 2; the adjustment mechanism 2 includes an adjustment frame 23 and a guide groove 24 formed on its surface; a support column 25 slidably mounted on the inner side of the sliding frame 4; a limiting column 28 slidably assembled in the guide groove 24; honeycomb holes 26 disposed inside the support column 25 to block the heat generated by the welding gun body 5 from being conducted to the top of the support column 25; and a heat dissipation mechanism 3 including multiple heat dissipation fins 34 with periodic corrugated surfaces whose extension direction forms a small angle of attack with the natural airflow direction. This invention uses a motor 21 to drive a threaded rod 22 to move an adjusting frame 23, and forces a limiting post 28 to slide synchronously along a guide groove 24. This achieves precise linkage adjustment of the spatial distribution of multiple welding torches, fundamentally solving the problem of multiple heat source accumulation, effectively dispersing the accumulation of heat in space, avoiding concentration at a single point, dispersing the spatial distribution of welding heat sources on the workpiece, reducing local heat density, and eliminating the cause of thermal deformation from the source. The honeycomb holes 26 inside the support post 25 and the hexagonal structure achieve an extremely high surface area-to-volume ratio, meaning that each heat conduction path is separated by more air. This solves the technical problem in the prior art where multiple welding torches working synchronously in adjacent or similar zones form a local ultra-high temperature field, leading to thermal deformation of the workpiece.

[0018] Furthermore, the adjustment mechanism 2 also includes a motor 21, which is fixedly installed on the front of the sliding frame 4. A threaded rod 22 is fixedly installed on the output end of the motor 21. The adjustment frame 23 is threadedly installed on the outside of the threaded rod 22. A guide column 27 is fixedly installed on the front of the sliding frame 4. The welding gun body 5 is assembled at the bottom of the support column 25 through a welding bracket, so that the position of the welding gun body 5 can be adjusted synchronously when the position of the support column 25 is adjusted.

[0019] Furthermore, the adjustment frame 23 is slidably installed on the outside of the guide column 27, and the adjustment frame 23 moves axially along the guide column 27 through the guide hole; the limiting column 28 is fixedly installed on the back of the support column 25, so that the limiting column 28 can be forced to slide synchronously along the guide groove 24, so as to realize the precise linkage adjustment of the spatial distribution of multiple welding guns, fundamentally solve the problem of multiple heat source accumulation, and effectively disperse the accumulation of heat in space.

[0020] Furthermore, the heat dissipation mechanism 3 also includes a heat absorption plate 31, which is fixedly installed inside the support column 25. A heat-conducting copper pipe 32 is fixedly installed on the front of the heat absorption plate 31, and a heat-conducting plate 33 is fixedly installed at the end of the heat-conducting copper pipe 32 away from the heat absorption plate 31. The present invention blocks part of the radial heat flow through the honeycomb holes 26 and combines gradient heat dissipation. From the heat absorption plate 31 to the heat-conducting copper pipe 32 to the heat dissipation fins 34, residual axial heat can be quickly captured and directed away from the sensitive area, and the heat can be converted into controllable thermal radiation release.

[0021] Furthermore, the heat dissipation fins 34 are arrayed on the surface of the heat conduction plate 33; an air guide duct 35 is fixedly installed on the air inlet side of the heat conduction plate 33, and an air guide plate 37 is fixedly installed inside the air guide duct 35. The air inlet side of the air guide duct 35 is conical and expanding, and the air outlet side is constricted and narrow. The air outlet side of the air guide duct 35 is fixedly installed with the air guide duct 36 through a sealing flange to form a collecting air channel. The arc-shaped convex surface of the air guide plate 37 concentrates and guides the airflow to the central area of ​​the converging inlet, blowing it toward the heat dissipation fins 34. The heat dissipation fins 34 are periodically corrugated curved surfaces, and their extension direction forms a small angle of attack with the natural airflow direction, which helps to guide the airflow to penetrate deeper into the interior of the fin assembly, reduce dead zones in corners and the bottom layer, and improve the overall fin utilization rate.

[0022] Furthermore, the air inlet side of the air duct 35 is conical and expanding, while the air outlet side is constricted and narrow. The air outlet side of the air duct 35 and the air duct 36 are fixedly installed through a sealing flange to form a collection air duct. The purpose is to draw in a larger area of ​​ambient airflow in the low-pressure zone, which facilitates the collection of natural wind and can then passively accelerate the airflow to maximize the utilization of the natural wind pressure difference.

[0023] Furthermore, the air guide plate 37 has an arc-shaped curved surface that protrudes towards the heat dissipation fins 34, forming an accelerating airflow channel. The air guide plate 37 is located at the outlet of the air guide duct 35 and is used to concentrate and guide the airflow to the surface of the heat dissipation fins 34. This facilitates the concentration and guidance of a large range of oncoming airflow towards the central area of ​​the convergence inlet.

[0024] Example 2: A method for suppressing thermal deformation in a multi-wire zoned synchronous surfacing welding device, comprising the following steps: S100, Adjusting the spacing: Start the motor 21. The output end of the motor 21 drives the threaded rod 22 to rotate, which in turn drives the adjustment frame 23, which is threaded on the outside of the threaded rod 22, to move downward under the guidance of the guide column 27. This causes the support column 25 to be adjusted inside the guide groove 24 opened in the adjustment frame 23, so that the spacing between the welding gun bodies 5 set at the bottom of the support column 25 is adjusted. S200, heat conduction suppression: During the welding operation, the heat generated by the welding gun body 5 enters the support column 25. First, the honeycomb holes 26 inside the support column 25 reduce heat conduction and heat convection, thereby improving the heat insulation capacity. The residual axial heat is captured by the heat absorption plate 31 and directionally transported to the heat conduction plate 33 away from the heat source through the heat conduction copper pipe 32. After the heat absorption plate 31 absorbs the heat, it is conducted to the heat conduction plate 33 by the heat conduction copper pipe 32, and the heat dissipation fins 34 perform heat dissipation operation. S300, Airflow Enhancement: Natural airflow is collected, constrained and guided by air duct 2 36 to efficiently pass through the heat dissipation fin 34 area. After being guided by air duct 2 36, the natural airflow passes through air duct 1 35 and is then concentrated and guided by air guide plate 37 to the central area of ​​the convergence inlet, i.e. the heat dissipation fin 34 area, thereby increasing the heat dissipation efficiency of heat dissipation fin 34, which can reduce the temperature in this area, reduce the temperature gradient and thermal deformation along the length of the column, and maintain its dimensional stability.

[0025] The embodiments disclosed in this invention are preferred embodiments, but are not limited thereto. Those skilled in the art can easily understand the spirit of this invention based on the above embodiments and make different extensions and variations, but as long as they do not depart from the spirit of this invention, they are all within the protection scope of this invention.

Claims

1. A multi-wire zoned synchronous surfacing welding device, characterized in that, include: A slide rail (1) is slidably mounted on the outside of the slide rail (1). An adjustment mechanism (2) is provided on the front of the slide frame (4). A heat dissipation mechanism (3) is provided on the front of the adjustment mechanism (2). A welding gun body (5) is provided at the bottom of the adjustment mechanism (2). The adjustment mechanism (2) includes an adjustment frame (23) and a guide groove (24) formed on its surface; The support column (25) is slidably installed inside the sliding frame (4); A limiting post (28) is slidably mounted in a guide groove (24); Honeycomb holes (26) are set inside the support column (25) to block the heat generated by the welding gun body (5) from being conducted to the top of the support column (25); The heat dissipation mechanism (3) includes multiple heat dissipation fins (34) with periodic corrugated surfaces, the extension direction of which forms a small angle of attack with the natural airflow direction.

2. The multi-wire zoned synchronous surfacing welding equipment according to claim 1, characterized in that, The adjustment mechanism (2) also includes a motor (21), which is fixedly installed on the front of the sliding frame (4). A threaded rod (22) is fixedly installed at the output end of the motor (21). The adjustment frame (23) is threadedly installed on the outside of the threaded rod (22). A guide column (27) is fixedly installed on the front of the sliding frame (4). The welding gun body (5) is assembled at the bottom of the support column (25) via a welding bracket.

3. The multi-wire zoned synchronous surfacing welding equipment according to claim 2, characterized in that, The adjusting frame (23) is slidably mounted on the outside of the guide post (27), and the adjusting frame (23) moves axially along the guide post (27) through the guide hole; The limiting post (28) is fixedly installed on the back of the support post (25).

4. The multi-wire zoned synchronous surfacing welding equipment according to claim 1, characterized in that, The heat dissipation mechanism (3) also includes a heat absorption plate (31), which is fixedly installed inside the support column (25). A heat-conducting copper pipe (32) is fixedly installed on the front of the heat absorption plate (31), and a heat-conducting plate (33) is fixedly installed at the end of the heat-conducting copper pipe (32) away from the heat absorption plate (31).

5. The multi-wire zoned synchronous surfacing welding equipment according to claim 4, characterized in that, The heat dissipation fins (34) are arrayed on the surface of the heat-conducting plate (33); The heat-conducting plate (33) has an air duct (35) fixedly installed on the air inlet side, and an air guide plate (37) is fixedly installed inside the air duct (35).

6. The multi-wire zoned synchronous surfacing welding equipment according to claim 5, characterized in that, The air inlet side of the air duct (35) is conical and expanding, while the air outlet side is constricted and narrow. The air outlet side of the first air duct (35) and the second air duct (36) are fixedly installed through a sealing flange to form a collection air duct.

7. The multi-wire zoned synchronous surfacing welding equipment according to claim 5, characterized in that, The air guide plate (37) is an arc-shaped curved surface that protrudes towards the heat dissipation fins (34) to form an acceleration air duct; The air guide plate (37) is located at the outlet of the air guide pipe (35) and is used to concentrate the airflow to the surface of the heat dissipation fins (34).

8. A multi-wire zoned synchronous surfacing welding device and its method for suppressing thermal deformation, applicable to the multi-wire zoned synchronous surfacing welding device as described in claim 7, characterized in that... Includes the following steps: S100, Adjusting the spacing: Start the motor (21), the output end of the motor (21) drives the threaded rod (22) to rotate, which in turn drives the adjustment frame (23) with the thread installed on the outside of the threaded rod (22) to move downward under the guidance of the guide column (27), so that the support column (25) can be adjusted inside the guide groove (24) opened in the adjustment frame (23), so that the spacing between the welding gun bodies (5) set at the bottom of the support column (25) is adjusted; S200, heat conduction suppression: During the welding operation, the heat generated by the welding gun body (5) enters the support column (25). First, the honeycomb holes (26) inside the support column (25) reduce heat conduction and heat convection, thereby improving the heat insulation capacity. The residual axial heat is captured by the heat absorption plate (31) and transported in a directional manner to the heat conduction plate (33) far away from the heat source through the heat conduction copper pipe (32). After the heat absorption plate (31) absorbs the heat, it is conducted to the heat conduction plate (33) by the heat conduction copper pipe (32), and the heat dissipation operation is performed by the heat dissipation fins (34). S300, airflow field enhancement: The natural airflow is collected, constrained and guided by the second air duct (36) to efficiently pass through the heat dissipation fin (34) area. After being guided by the second air duct (36), the natural airflow passes through the first air duct (35) and then through the air guide plate (37) to concentrate and guide the large-scale airflow towards the central area of ​​the convergence inlet, namely the heat dissipation fin (34) area, thereby increasing the heat dissipation efficiency of the heat dissipation fin (34), thereby reducing the temperature in this area, reducing the temperature gradient and thermal deformation along the length of the column, and maintaining its dimensional stability.

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