Normalizing device for flute welds

Abstract

This invention relates to the field of rail processing equipment, specifically to a normalizing device for grooved rail frog welds. The device includes a mounting bracket, a crossbeam, an induction electrode, and an induction coil. The crossbeam is rotatably connected to the mounting bracket, and the induction electrode is connected to the crossbeam. The induction coil is connected to the induction electrode and is used to be fitted onto the weld joint between the connecting rail and the frog core, and is used to heat the connecting rail and the frog core. This normalizing device for grooved rail frog welds can reduce the labor intensity of workers, improve the heating quality after welding, and avoid uneven heating. It can thus increase the heating temperature, avoid poor weld grain size and reduced toughness, and also prevent uneven surface hardness near the grooved rail frog weld due to uneven heating.

Description

Technical Field

[0001] This invention relates to the field of rail processing equipment, and more specifically, to a normalizing device for the weld seam of a grooved rail frog. Background Technology

[0002] Currently, flash welding is used for welding the frogs of trough-shaped rails in urban trams. This process generates significant welding stress, and the excessively high heating temperature leads to coarse grains in the microstructure near the weld. To reduce welding stress and refine the weld microstructure, post-weld normalizing is necessary. Due to the small space between the two welds and the complex structure of the trough-shaped rail frogs, existing technologies often use acetylene (or acetone) + O2, with two people simultaneously using a heating torch to heat and maintain the temperature on both sides of the weld after welding. However, this method has the following drawbacks:

[0003] The small space between the two channel rails makes it difficult to heat the welding torch and measure the heating temperature, which can easily lead to uneven heating. The heating is done manually, which is labor-intensive and the weld quality is greatly affected by human factors. The post-weld heating temperature is low, resulting in poor weld grain size and low toughness. Moreover, uneven heating can easily lead to uneven surface hardness near the channel rail frog weld. Summary of the Invention

[0004] The purpose of this invention is to provide a normalizing device for the weld seam of a flute, which can reduce the labor intensity of workers, improve the heating quality after welding, and avoid uneven heating; thereby increasing the heating temperature, avoiding poor weld grain size and reduced toughness, and also avoiding uneven surface hardness near the flute weld seam due to uneven heating.

[0005] The embodiments of the present invention are implemented as follows:

[0006] In a first aspect, the present invention provides a normalizing device for a flute weld, the flute weld normalizing device comprising a mounting bracket, a crossbeam, an induction electrode and an induction coil.

[0007] The crossbeam is rotatably connected to the mounting bracket, and the induction electrode is connected to the crossbeam; the induction coil is connected to the induction electrode, and the induction coil is used to be sleeved at the welding joint between the connecting rail and the fork core, and is used to heat the connecting rail and the fork core.

[0008] In an alternative embodiment, the induction coil has a profile adapted to the outer surface of the connecting rail and the fork, and is clearance-fitted with the connecting rail and the fork.

[0009] In an optional embodiment, the induction coil includes a first part and a second part, which are detachably connected.

[0010] Along the extension direction of the connecting rail, the opposite sides of the connecting rail and the fork core are respectively fitted with the first split body and the second split body with clearance.

[0011] In an optional implementation, the first sub-body includes a first sub-body and a second sub-body, and the second sub-body includes a third sub-body and a fourth sub-body;

[0012] The first sub-body and the second sub-body are spaced apart along the extension direction of the connecting rail, and the first sub-body and the second sub-body are respectively used to contact one side of the connecting rail and one side of the fork.

[0013] The third and fourth sub-body are spaced apart along the extension direction of the connecting rail; the third and fourth sub-body are respectively used to contact the other side of the connecting rail and the other side of the fork.

[0014] In an alternative implementation, the sensing electrode is slidably connected to the crossbeam.

[0015] In an optional embodiment, the sensing electrode is provided with a sliding hole that slidably engages with the crossbeam.

[0016] In an optional embodiment, the sensing electrode includes a first portion and a second portion, which are detachably connected.

[0017] Both the first section and the second section are provided with connecting grooves. The connecting groove of the first section is used to form a sliding hole together with the connecting groove of the second section.

[0018] In an optional implementation, the first portion is connected to the first split body, and the second portion is connected to the second split body.

[0019] In an optional embodiment, the normalizing device for the flute weld also includes a coil fixing beam and stiffening plates;

[0020] The coil fixing beam is connected to the mounting bracket, and the stiffening plate is insulated from the coil fixing beam and the induction coil.

[0021] In an optional embodiment, the mounting bracket has a slotted section, and the crossbeam is slidably connected to the slotted section, which is perpendicular to the extension direction of the fork.

[0022] The beneficial effects of the embodiments of the present invention include:

[0023] The normalizing device for the weld seam of a flute includes a mounting bracket, a crossbeam, an induction electrode, and an induction coil. The crossbeam is rotatably connected to the mounting bracket, and the induction electrode is connected to the crossbeam. The induction coil is connected to the induction electrode and is used to be fitted onto the weld joint between the connecting rail and the fork core, and is used to heat the connecting rail and the fork core. Therefore, when normalizing a flute, this normalizing device can heat the connecting rail and the fork core at the weld joint by fitting the induction coil onto the weld joint. This heating method ensures uniform heating of the connecting rail and the fork core at the weld joint, thereby improving the heating quality after welding and avoiding uneven heating. It also increases the heating temperature, preventing poor weld grain size and reduced toughness, and avoids uneven surface hardness near the weld seam due to uneven heating. Moreover, this heating method can maintain the relative position of the induction coil with respect to the slotted rail frog by installing brackets and crossbeams, thereby maintaining the heating state of the connecting rail and fork core, which can reduce the labor intensity of workers and improve the heating efficiency. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a first-view structural schematic diagram of the normalizing device for the grooved rail frog weld in an embodiment of the present invention.

[0026] Figure 2 This is a schematic diagram of the normalizing device for the grooved rail frog weld in an embodiment of the present invention from a second perspective.

[0027] Figure 3 This is a cross-sectional view of the normalizing device for the weld seam of the flute in an embodiment of the present invention;

[0028] Figure 4 This is a structural schematic diagram of the normalizing device for the grooved rail frog weld in an embodiment of the present invention from a third-view perspective.

[0029] Figure 5 This is a schematic diagram of the installation of the normalizing device for the grooved rail frog weld in an embodiment of the present invention from a first-view perspective.

[0030] Figure 6 This is a schematic diagram of the installation of the normalizing device for the grooved rail frog weld in an embodiment of the present invention from a second perspective.

[0031] Icons: 100-Slotted rail fork weld normalizing device; 110-Mounting bracket; 120-Crossbeam; 130-Induction electrode; 140-Induction coil; 10-Connecting rail; 20-Fork core; 141-First sub-body; 142-Second sub-body; 143-First sub-body; 144-Second sub-body; 145-Third sub-body; 146-Fourth sub-body; 131-Sliding hole; 132-First section; 133-Second section; 150-Coil fixing beam; 160-Firming plate; 111-Strip groove. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0034] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0035] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0036] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0037] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] Currently, flash welding is used for welding the frogs of trough-shaped rails in urban trams. This process generates significant welding stress, and the excessively high heating temperature leads to coarse grains in the microstructure near the weld. To reduce welding stress and refine the weld microstructure, post-weld normalizing is necessary. Due to the limited space between the two welds and the complex structure of the trough-shaped rail frogs, existing technologies often use acetylene (or acetone) + O2, with two people simultaneously using a heating torch to heat and maintain the temperature on both sides of the weld. While the rail web and rail base are relatively thin, and the heating torch can reach the required temperature quickly, the limited space between the two welds in the triangular areas of the rail web and rail base hinders post-weld heating on one side. Furthermore, the rail head is more than four times thicker than the rail web and rail base, resulting in a significant temperature difference between the core and surface of the rail head, leading to substantial temperature variations between the rail head, rail web, and rail base of the trough-shaped rail.

[0039] Therefore, the existing heating method using a heating torch has the following disadvantages: the space between the two channel rails is small, which is not conducive to heating the torch and measuring the heating temperature, and is prone to uneven heating; heating is done manually, which is labor-intensive, and the weld quality is greatly affected by human factors; the post-weld heating temperature is low, the weld grain size is poor, the toughness is low, and uneven heating can easily lead to uneven surface hardness near the channel rail frog weld.

[0040] For the reasons mentioned above, please refer to Figures 1-6 , Figures 1-4 The structure of the normalizing device for the rail frog weld in an embodiment of the present invention is shown. Figure 5 and Figure 6 The structure of the normalizing device for the weld seam of the flute rail, the connecting rail, and the fork core in an embodiment of the present invention is shown.

[0041] This embodiment provides a normalizing device 100 for the weld seam of a slotted rail frog. The normalizing device 100 for the weld seam of a slotted rail frog includes a mounting bracket 110, a crossbeam 120, an induction electrode 130, and an induction coil 140.

[0042] The crossbeam 120 is rotatably connected to the mounting bracket 110, and the induction electrode 130 is insulated from the crossbeam 120; the induction coil 140 is connected to the induction electrode 130, and the induction coil 140 is used to be sleeved on the welding joint of the connecting rail 10 and the fork 20, and is used to heat the connecting rail 10, the fork 20 and their weld.

[0043] The working principle of the normalizing device 100 for the weld seam of the flute is as follows:

[0044] Please refer to Figures 1-6 The normalizing device 100 for the weld seam of the flute includes a mounting bracket 110, a crossbeam 120, an induction electrode 130, and an induction coil 140. The crossbeam 120 is rotatably connected to the mounting bracket 110, and the induction electrode 130 is insulated from the crossbeam 120. The induction coil 140 is connected to the induction electrode 130, and the induction coil 140 is used to be sleeved on the weld seam between the connecting rail 10 and the fork core 20, and is used to heat the connecting rail 10, the fork core 20, and their weld seam. Therefore, when normalizing the grooved rail frog weld seam, the normalizing device 100 can heat the connecting rail 10 and the fork core 20 at the weld joint by placing the induction coil 140 on the weld joint of the connecting rail 10 and the fork core 20. This heating method can uniformly heat the connecting rail 10 and the fork core 20 at the weld joint, thereby improving the heating quality after welding and avoiding uneven heating. It can also increase the heating temperature, avoid poor weld grain size and reduced toughness, and prevent uneven surface hardness near the weld seam of the grooved rail frog due to uneven heating. Moreover, this heating method can maintain the relative position of the induction coil 140 with respect to the grooved rail frog by using the mounting bracket 110 and the crossbeam 120, thereby maintaining the heating state of the connecting rail 10 and the fork core 20, reducing the labor intensity of the workers and improving the heating efficiency.

[0045] It should be noted that the induction electrode 130 is insulated from the crossbeam 120; and as described above, the function of the flute weld normalizing device 100 is to perform post-weld normalizing on the weld. Therefore, during operation, the induction electrode 130 is electrically connected to an external power source, and the induction coil 140 heats the connecting rail 10 and the fork core 20 at the weld joint. Thus, the area covered by the induction coil 140 is the connecting rail 10 and the fork core 20 at the weld joint. Furthermore, to improve the uniformity of heating, when the induction coil 140 is fitted over the connecting rail 10 and the fork core 20, a clearance fit can be made between the induction coil 140 and the connecting rail 10 and the fork core 20 at the weld joint, and the distance between the induction coil 140 and the connecting rail 10 and the fork core 20 at the weld joint is uniform, thereby improving the uniformity of weld heating. This improves the efficiency of heat conduction and avoids uneven heating.

[0046] Please refer to Figures 1-6 In this embodiment, when setting the induction coil 140, in order to improve the uniformity of heating, the induction coil 140 is fitted with the connecting rail 10 and the fork 20 at the welding point with a gap, and the spacing at each position is uniform. Therefore, in order to increase the uniformity of the gap between the induction coil 140 and the connecting rail 10 and the fork 20, the induction coil 140 has a contour that is adapted to the outer surface of the connecting rail 10 and the fork 20, and is fitted with the connecting rail 10 and the fork 20 with a gap.

[0047] Further, please refer to Figures 1-6 As can be seen from the above, due to the small space between the two welds and the complex structure of the grooved rail welded frog, in order to facilitate the installation of the induction coil 140 and its cooperation with the connecting rail 10 and the fork core 20, and to ensure uniform spacing at each position, the induction coil 140 may include a first part 141 and a second part 142, which are detachably connected; along the extension direction of the connecting rail 10, the opposite sides of the connecting rail 10 and the fork core 20 are respectively clearance-fitted with the first part 141 and the second part 142.

[0048] Therefore, when installing the induction coil 140, the first part 141 and the second part 142 of the induction coil 140 can be respectively positioned on both sides of the connecting rail 10 along its extension direction. After the first part 141 and the second part 142 are respectively fitted with the connecting rail 10 and the fork 20 with clearance, the first part 141 and the second part 142 located on both sides of the connecting rail 10 are connected by bolts or other connections to complete the installation of the induction coil 140. This arrangement facilitates the installation and disassembly of the induction coil 140, and requires little operating space during the installation and disassembly process, thereby improving the efficiency of the installation and disassembly of the induction coil 140. In addition, this arrangement also makes it easier to manufacture the first part 141 and the second part 142 according to the contours of the connecting rail 10 and the fork 20, thereby reducing the manufacturing cost of the induction coil 140.

[0049] Further, please refer to Figures 1-6 In order to enable the first part 141 to be able to fit with one side of the connecting rail 10 and the fork 20 along the extension direction of the connecting rail 10 and maintain a uniform gap, and to enable the second part 142 to fit with the other side of the connecting rail 10 and the fork 20 along the extension direction of the connecting rail 10 and maintain a uniform gap, the first part 141 includes a first sub-body 143 and a second sub-body 144, and the second part 142 includes a third sub-body 145 and a fourth sub-body 146.

[0050] The first sub-body 143 and the second sub-body 144 are spaced apart along the extension direction of the connecting rail 10. The first sub-body 143 and the second sub-body 144 are respectively used to make clearance fit with one side of the connecting rail 10 and one side of the fork 20 and maintain a uniform spacing. The third sub-body 145 and the fourth sub-body 146 are spaced apart along the extension direction of the connecting rail 10. The third sub-body 145 and the fourth sub-body 146 are respectively used to make clearance fit with the other side of the connecting rail 10 and the other side of the fork 20 and maintain a uniform spacing.

[0051] Thus, through this arrangement, the outer peripheral surface of the connecting rail 10 can be fitted with the first sub-body 143 and the third sub-body 145 with a clearance and maintain a uniform spacing, while the outer peripheral surface of the fork core 20 can be fitted with the second sub-body 144 and the fourth sub-body 146 with a clearance and maintain a uniform spacing. In this way, the connecting rail 10 and the fork core 20 can be heated evenly.

[0052] Further, please refer to Figures 1-6 In this embodiment, when installing the sensing electrode 130, since the sensing coil 140 is connected to the sensing electrode 130, the position of the sensing coil 140 can be adjusted by adjusting the position of the sensing electrode 130. Since the crossbeam 120 connected to the sensing electrode 130 is rotatably connected to the mounting bracket 110, when the crossbeam 120 rotates to the correct position relative to the mounting bracket 110, the position of the sensing coil 140 can be adjusted by the movement of the sensing electrode 130 relative to the crossbeam 120. Thus, the sensing electrode 130 can be slidably insulatedly connected to the crossbeam 120. In addition, in order to adjust the position of the induction coil 140 by the movement of the crossbeam 120 relative to the mounting bracket 110, the mounting bracket 110 can also be provided with a strip groove 111. The crossbeam 120 and the strip groove 111 are slidably connected. The strip groove 111 is perpendicular to the extension direction of the fork core 20. Thus, the position adjustment range of the induction coil 140 can be expanded by the sliding of the crossbeam 120 relative to the strip groove 111, thereby expanding the applicability of the groove-type rail fork weld normalizing device 100.

[0053] To allow the sensing electrode 130 to be slidably connected to the crossbeam 120, the sensing electrode 130 is provided with a sliding hole 131 that slidably engages with the crossbeam 120. Simultaneously, similar to the principle of the induction coil 140, to simplify the installation steps of the sensing electrode 130, in this embodiment, the sensing electrode 130 includes a first portion 132 and a second portion 133, which are detachably connected. Both the first portion 132 and the second portion 133 have connecting grooves, with the connecting groove of the first portion 132 forming the sliding hole 131 together with the connecting groove of the second portion 133. Furthermore, the first portion 132 is connected to the first body 141, and the second portion 133 is connected to the second body 142. This simplifies the installation steps and reduces the installation difficulty of the flute weld normalizing device 100.

[0054] Further, please refer to Figures 1-6 In this embodiment, the outline of the induction coil 140 can be adapted to the outer outline of the connecting rail 10 and the fork 20. In other embodiments of the present invention, in order to expand the applicability of the flute weld normalizing device 100 and improve the installation efficiency, the top of the induction coil 140 can be left with a margin of movement. That is, after the induction coil 140 is connected to the connecting rail 10 and the fork 20, it can move vertically relative to the connecting rail 10, thereby reducing the difficulty of installing the induction coil 140 and expanding the applicability of the flute weld normalizing device 100. Therefore, after the position of the induction coil 140 is adjusted to the correct position, the induction coil 140 needs to be fixed. Therefore, the flute weld normalizing device 100 also includes a coil fixing beam 150 and a stiffener 160. The coil fixing beam 150 is connected to the mounting bracket 110, and the stiffener 160 is insulated from the coil fixing beam 150 and the induction coil 140. This configuration allows the induction coil 140 to be fixed relative to the mounting bracket 110 after the position of the induction coil 140 is adjusted to the correct position, through the connection between the stiffener 160 and the coil fixing beam 150 and the induction coil 140.

[0055] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A normalizing device for the weld seam of a grooved rail frog, characterized in that: The normalizing device (100) for the grooved rail fork weld seam includes a mounting bracket (110), a crossbeam (120), an induction electrode (130), and an induction coil (140). The crossbeam (120) is rotatably connected to the mounting bracket (110), and the sensing electrode (130) is connected to the crossbeam (120); the sensing coil (140) is connected to the sensing electrode (130), and the sensing coil (140) is used to be sleeved at the welding joint of the connecting rail (10) and the fork (20), and is used to heat the connecting rail (10) and the fork (20). The induction coil (140) has a profile that conforms to the outer surface of the connecting rail (10) and the fork (20), and is clearance-fitted with the connecting rail (10) and the fork (20); The induction coil (140) includes a first part (141) and a second part (142), the first part (141) and the second part (142) being detachably connected; Along the extending direction of the connecting rail (10), the opposite sides of the connecting rail (10) and the fork (20) respectively have clearance fit with the first split body (141) and the second split body (142); The first sub-body (141) includes a first sub-body (143) and a second sub-body (144), and the second sub-body (142) includes a third sub-body (145) and a fourth sub-body (146). The first sub-body (143) and the second sub-body (144) are spaced apart along the extension direction of the connecting rail (10), and the first sub-body (143) and the second sub-body (144) are respectively used to make clearance fit with one side of the connecting rail (10) and one side of the fork (20); The third sub-body (145) and the fourth sub-body (146) are spaced apart along the extension direction of the connecting rail (10); the third sub-body (145) and the fourth sub-body (146) are respectively used to make clearance fit with the other side of the connecting rail (10) and the other side of the fork (20); The sensing electrode (130) is slidably connected to the crossbeam (120); The sensing electrode (130) is provided with a sliding hole (131) that can slidably engage with the crossbeam (120). The sensing electrode (130) includes a first portion (132) and a second portion (133), the first portion (132) and the second portion (133) being detachably connected; Both the first portion (132) and the second portion (133) are provided with connecting grooves. The connecting groove of the first portion (132) is used to form the sliding hole (131) together with the connecting groove of the second portion (133). The mounting bracket (110) has a strip groove (111), and the crossbeam (120) is slidably connected to the strip groove (111). The strip groove (111) is perpendicular to the extension direction of the fork (20).

2. The normalizing device for the weld seam of the grooved rail frog according to claim 1, characterized in that: The first part (132) is connected to the first part (141), and the second part (133) is connected to the second part (142).

3. The normalizing device for the weld seam of the grooved rail frog according to claim 1, characterized in that: The grooved rail fork weld normalizing device (100) also includes a coil fixing beam (150) and a stiffening plate (160). The coil fixing beam (150) is connected to the mounting bracket (110), and the stiffening plate (160) is insulated from the coil fixing beam (150) and the induction coil (140).

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