A riveting device for leaf spring in locomotive brake system

Abstract

The utility model discloses a riveting processing equipment for the leaf spring in locomotive brake system, including punch, the storage cavity with the opening towards right side has on punch, the top plate downside of storage cavity has the stamping rod that can reciprocate along the longitudinal direction, the lower end surface of stamping rod is installed with the upper die plate, and the workbench upper end surface of storage cavity bottom is installed with the lower die plate corresponding with upper die plate, high frequency heater is located in the right side of storage cavity and is adjacent, and high frequency heater has the tubular heating assembly extending to the outside of front side, and the tubular heating assembly inside has the heating cavity through both end surfaces, and the length of heating cavity is equal to or greater than the length of rivet on leaf spring twice. When using, only need an operator, save half manpower cost, when high frequency heater is heated to the set temperature length of rivet post, and the length is shortened to 1 / 3 of the length of flame barbecue heating, and the overall temperature of rivet post after heating is uniform, avoids the occurrence of microcrack phenomenon in the process of rivet, and one stamping can realize the riveting of two rivets, improves riveting processing efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of processing equipment for leaf springs in locomotive braking systems, and specifically to a riveting processing equipment for leaf springs in locomotive braking systems. Background Technology

[0002] The train braking system is one of the most important safety devices on a train, and the leaf spring is a component used in the brake assembly of the train braking system. For example... Figure 1 The illustration shows a leaf spring for a locomotive braking system, comprising a leaf spring body A. The leaf spring body A has a longitudinal through hole A-1 penetrating its upper and lower end faces at its right end. The leaf spring body A has vertical side faces A-2 on its front and rear sides at the middle. A mounting seat B is fixedly mounted on its left end. The mounting seat B has a mounting groove B-1 with its opening facing the leaf spring body A. The left end of the leaf spring body A is embedded in the mounting groove B-1 on the mounting seat B. The left end of the leaf spring body A and the mounting seat B are respectively provided with four sets of longitudinal through holes II. The two are fixedly connected together by rivets C that pass through and are riveted into the four sets of longitudinal through holes II.

[0003] Currently, the riveting process for the left end of the blade spring body A and the mounting base B is as follows: the left end of the blade spring body A is embedded in the mounting groove B-1 on the mounting base B, and then the two are laid flat on the worktable of the hydraulic press; the rivet is heated to a certain temperature over a flame, and then the rivet is inserted through the left end of the blade spring body A and the mounting base B into a set of corresponding longitudinal through holes two using clamps; the hydraulic press is started, and the two ends of the rivet are pressed and deformed into rivets C using the press fittings on the hydraulic press and riveted into a set of corresponding longitudinal through holes two. The problems with the above-mentioned riveting method for the blade spring body and the mounting base are as follows: (1) Due to the heating of the rivet on the flame, the rivet heated to the specified temperature has inconsistent internal and external temperatures, that is, poor overall temperature uniformity. This can easily lead to micro-cracks in the rivet during the riveting process, which may cause hidden dangers to the overall service life of the blade spring in the later use process; (2) The time required for heating the rivet on the flame is relatively long, which seriously restricts the overall riveting efficiency of the blade spring; (3) During the operation, at least two operators are required to work together. One operator is responsible for embedding the left end of the blade spring body into the mounting groove on the mounting base and then laying it flat on the worktable of the hydraulic press. The other operator needs to use clamps to hold the rivet and heat it to the specified temperature on the flame. Then, the rivet is inserted into a set of corresponding longitudinal through holes on the left end of the blade spring body and the mounting base. Finally, the hydraulic press is started to perform the riveting process. The amount of manual labor involved is large, resulting in a high processing cost for the blade spring. Therefore, this utility model proposes a riveting processing equipment for blade springs in locomotive braking systems in order to solve the above-mentioned technical problems. Summary of the Invention

[0004] The purpose of this invention is to overcome the deficiencies in the existing technology and provide a riveting processing device for leaf springs in locomotive braking systems. This device includes a punch press riveting element and a high-frequency heating element. Only one operator is needed to coordinate the loading of the leaf spring body and mounting base onto the punch press, as well as the loading of the rivet into the heating chamber of the high-frequency heater. Compared to the traditional riveting method using a hydraulic press and flame heating, this method saves half the labor cost, thus reducing labor expenses. The high-frequency heater heats the rivet to a set temperature (e.g., 60°C). At 50℃, the time required to heat the rivet to the set temperature is reduced to 1 / 3 of the time required for flame heating, significantly improving the heating efficiency of the rivet. Furthermore, the rivet heated to the set temperature by high frequency has a uniform overall temperature, effectively preventing the occurrence of micro-cracks on the rivets during the riveting process. This helps ensure the blade spring is firmly and stably used in the later stages, and also helps extend the overall service life of the blade spring. The heating chamber of the high-frequency heater can heat two rivets at the same time, that is, two rivets can be riveted in one stamping, further improving the riveting efficiency of both the blade spring body and the mounting base.

[0005] To achieve the above objectives, the technical solution of this utility model is to design a riveting processing equipment for leaf springs in a locomotive braking system, including a punch press, an upper die assembly, a lower die, and a high-frequency heater. The punch press has a storage cavity with an opening facing the right side. The lower side of the top plate of the storage cavity has a punching rod that can reciprocate along the longitudinal direction. The lower end face of the punching rod is equipped with an upper die for pressing the upper end face of the rivet on the leaf spring. The lower end of the punch press has a worktable extending to the bottom of the storage cavity. The upper end face of the worktable is equipped with a lower die for pressing the lower end face of the rivet on the leaf spring, and the upper die and the lower die correspond to each other.

[0006] The high-frequency heater is located adjacent to the right side of the storage cavity on the punch press. The high-frequency heater has two heating electrodes extending to the front exterior. The free ends of the two heating electrodes are equipped with a tubular heating assembly in the horizontal direction. The tubular heating assembly has a heating cavity that runs through both end faces, and the length of the heating cavity is greater than or equal to twice the length of the rivet on the leaf spring.

[0007] This utility model discloses a riveting processing equipment for leaf springs in locomotive braking systems, comprising a punch press riveting element and a high-frequency heating element. During operation, only one operator is required to efficiently coordinate the loading of the leaf spring body and mounting base onto the punch press, as well as the loading of the rivet into the heating chamber of the high-frequency heater. Compared to the traditional riveting method using a hydraulic press and flame heating, this method saves half the labor cost, thus reducing labor expenses. The high-frequency heater heats the rivet to the set temperature (e.g., 650℃) in just a few seconds, reducing the heating time to one-third that of flame heating, significantly improving the heating efficiency. Furthermore, the high-frequency heater ensures uniform overall temperature of the rivet, effectively preventing micro-cracks on the rivets during the riveting process. This helps ensure the leaf spring's stability and longevity during later use, extending its overall service life. The high-frequency heater's heating chamber can simultaneously heat two rivets, meaning two rivets can be riveted in a single press, further improving the riveting efficiency of both the leaf spring body and the mounting base.

[0008] A preferred technical solution further includes an upper mold assembly, which includes a base plate. The upper end face of the base plate is vertically fixed to the lower end face of the stamping rod. The upper template is fixedly installed on the lower end face of the base plate. Guide posts extending downwards are also fixed at both ends of the base plate. The lower template has guide holes penetrating the plate body at both ends. During the process of the upper and lower templates closing and pressing the rivet onto the leaf spring, the lower ends of the guide posts movably pass through the corresponding guide holes. The upper mold assembly has a clever and reasonable structural design. During the downward movement of the upper template and the closing process of the lower template, the lower ends of the guide posts are inserted into the guide holes of the lower template, thus limiting the closing process of the upper and lower templates and further ensuring good vertical correspondence between the upper and lower templates and the rivet to be pressed, which helps to ensure the quality of rivet forming.

[0009] A further preferred technical solution includes four circular grooves (I) on the lower end face of the upper template and four circular grooves (II) on the upper end face of the lower template. Each of the four circular grooves (I and II) corresponds to a rivet on the leaf spring. Furthermore, the top surface of the circular groove (I) and the bottom surface of the circular groove (II) are both designed as concave arc surfaces with the concave side facing the open end. This design ensures that both ends of the formed rivet have rounded, convex end caps, improving the grip comfort and aesthetics of the left end of the leaf spring.

[0010] A further preferred technical solution includes a workpiece support plate mounted on the upper surface of the workbench. From left to right, the upper surface of the workpiece support plate is sequentially fixed with the lower template, positioning block one, and positioning block two. Positioning block one has an upward-opening positioning groove at its upper end for embedding and positioning the vertical side of the leaf spring. Positioning block two has a threaded blind hole coaxially corresponding to the longitudinal through hole on the leaf spring and a locking pin screwed into the threaded blind hole. In use, the leaf spring body is placed on the lower template, positioning block one, and positioning block two. The positioning groove on positioning block one corresponds to the middle of the leaf spring body for embedding and positioning, and the locking pin fixes and locks the right end of the leaf spring body to positioning block two. This effectively prevents displacement of the leaf spring body during the stamping and riveting process of the mounting base and the left end of the leaf spring body together, helping to improve the accuracy of the riveting connection between the mounting base and the left end of the leaf spring body.

[0011] A preferred technical solution is that the tubular heating assembly includes a spiral heating copper tube and a quartz tube inserted inside the spiral heating copper tube, with the heating cavity formed inside the quartz tube. The tubular heating assembly has a clever and reasonable structural design, effectively avoiding uneven heating of the rivet post by using the quartz tube for high-frequency heating.

[0012] A further preferred technical solution includes a temperature monitoring component, which comprises a bracket and an infrared temperature controller. The bracket has a figure-seven shape, with its lower end vertically fixed to the front of the upper end of the high-frequency heater and its upper end extending above the spiral heating copper tube. The infrared temperature controller is installed on the lower side of the upper end of the bracket. The temperature monitoring component has a clever and reasonable structural design, good compatibility with the spiral heating copper tube, and enables real-time and accurate monitoring of the spiral heating copper tube, thus helping to improve the precise control of the working temperature of the spiral heating copper tube.

[0013] The advantages and beneficial effects of this utility model are as follows:

[0014] 1. This utility model discloses a riveting processing equipment for leaf springs in locomotive braking systems, comprising a punch press riveting element and a high-frequency heating element. Only one operator is required to coordinate the loading of the leaf spring body and mounting base onto the punch press, as well as the loading of the rivet into the heating chamber of the high-frequency heater. Compared to the traditional riveting method using a hydraulic press and flame heating, this method saves half the labor cost, thus reducing labor expenses. The high-frequency heater heats the rivet to the set temperature (e.g., 650℃) in just a few seconds, reducing the heating time to one-third that of flame heating, significantly improving the heating efficiency. Furthermore, the high-frequency heater ensures uniform overall temperature of the rivet, effectively preventing micro-cracks on the rivets during the riveting process. This helps ensure the leaf spring's stability and extends its overall service life. The high-frequency heater's heating chamber can simultaneously heat two rivets, meaning two rivets can be riveted in a single press, further improving the riveting efficiency of both the leaf spring body and the mounting base.

[0015] 2. The upper mold assembly has a clever and reasonable structural design. During the downward movement of the upper mold plate and the closing process of the lower mold plate, the lower end of the guide post is inserted into the guide through hole of the lower mold plate, which plays a limiting role in the closing process of the upper and lower mold plates. This further ensures that the upper and lower mold plates are perpendicularly aligned with the rivet to be pressed, which helps to ensure the quality of rivet forming.

[0016] 3. The upper template has four circular grooves (I) on its lower end face, and the lower template has four circular grooves (II) on its upper end face. Each of the four circular grooves (I and II) corresponds to a rivet on the leaf spring. The top surface of circular groove I and the bottom surface of circular groove II are both concave arc surfaces with the concave side facing the open end. This design ensures that both ends of the formed rivet have rounded, convex end caps, improving the grip comfort and aesthetics of the left end of the leaf spring.

[0017] 4. In use, the blade spring body is placed on the lower template, positioning block one, and positioning block two. The positioning groove on positioning block one corresponds to the middle of the blade spring body and plays a role in embedding and positioning. The locking pin fixes and locks the right end of the blade spring body to positioning block two. Thus, during the process of stamping and riveting the mounting base and the left end of the blade spring body together, the displacement of the blade spring body is effectively prevented, which helps to improve the accuracy of the riveting connection between the mounting base and the left end of the blade spring body.

[0018] 5. The tubular heating assembly includes a spiral heating copper tube and a quartz tube inserted inside the spiral heating copper tube, with the heating cavity formed inside the quartz tube. The tubular heating assembly has a clever and reasonable structural design, effectively avoiding uneven heating of the rivet post by using the quartz tube for high-frequency heating. Attached Figure Description

[0019] Figure 1 This is a three-dimensional view of a leaf spring used in a locomotive braking system, as described in the background art.

[0020] Figure 2 This is a perspective view from the right front side of the riveting equipment for leaf springs in locomotive braking systems according to this utility model.

[0021] Figure 3 This is a top-down 3D view of the upper mold component;

[0022] Figure 4 This is a three-dimensional view of the upper mold component from an upward angle;

[0023] Figure 5 This is an assembly diagram of the lower template, positioning block one, and positioning block two on the workpiece support plate;

[0024] Figure 6 This is an assembly diagram of the high-frequency heater and the temperature monitoring component;

[0025] Figure 7 yes Figure 6 A magnified view of a section at point H in the middle;

[0026] Figure 8 This is one of the usage state diagrams of a riveting processing equipment for leaf springs in a locomotive braking system according to this utility model;

[0027] Figure 9 This is the second usage diagram of a riveting processing equipment for leaf springs in a locomotive braking system according to this utility model.

[0028] Figure 10 yes Figure 9 A magnified view of the area at point S in the middle.

[0029] In the diagram: A. Leaf spring body; A-1. Longitudinal through hole one; A-2. Vertical side; B. Mounting base; B-1. Mounting groove; C. Rivet; 1. Punch press; 2. Upper die assembly; 3. Workpiece support plate; 4. Lower die plate; 5. Positioning block one; 6. Positioning block two; 7. High-frequency heater; 8. Temperature monitoring assembly; 1-1. Storage cavity; 1-2. Top plate; 1-3. Punch rod; 1-4. Worktable; 2-1. Seat plate; 2-2. Upper... Template; 2-2a, Circular Groove I; 2-3, Guide Post; 4-1, Circular Groove II; 4-2, Guide Through Hole; 5-1, Positioning Groove; 6-1, Threaded Blind Hole; 6-2, Locking Pin; 6-2a, Stud; 6-2b, End Cap; 7-1, Heating Electrode; 7-2, Tubular Heating Assembly; 7-2a, Spiral Heating Copper Tube; 7-2b, Quartz Tube; 7-3, Heating Chamber; 8-1, Support; 8-2, Infrared Temperature Controller. Detailed Implementation

[0030] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0031] Example

[0032] like Figures 2-7 As shown, a riveting processing device for leaf springs in a locomotive braking system includes a punch press 1, an upper die assembly 2, a lower die plate 4, and a high-frequency heater 7. The punch press 1 has a storage cavity 1-1 with an opening facing the right side. The top plate 1-2 of the storage cavity 1-1 has a punching rod 1-3 that can reciprocate along the longitudinal direction on its lower side. An upper die plate 2-2 for pressing the upper end face of the rivet C on the leaf spring is installed on the lower end face of the punching rod 1-3. The lower end of the punch press 1 has a worktable 1-4 extending to the bottom of the storage cavity 1-1. A lower die plate 4 for pressing the lower end face of the rivet C on the leaf spring is installed on the upper end face of the worktable 1-4, and the upper die plate 2-2 and the lower die plate 4 correspond to each other.

[0033] The high-frequency heater 7 is located adjacent to the right side of the storage cavity 1-1 on the punch press 1. The high-frequency heater 7 has two heating electrodes 7-1 extending to the front exterior. A horizontally oriented tubular heating assembly 7-2 is mounted on the free ends of the two heating electrodes 7-1. The tubular heating assembly 7-2 has a heating cavity 7-3 penetrating both end faces, and the length of the heating cavity 7-3 is greater than or equal to twice the length of the rivet C on the leaf spring. Specifically, it also includes two positioning pins, which are adapted to a set of corresponding longitudinal through holes on the left end of the leaf spring body A and the mounting base B.

[0034] Preferably, the assembly further includes an upper mold assembly 2, which includes a base plate 2-1. The upper end face of the base plate 2-1 is vertically fixed to the lower end face of the stamping rod 1-3. The upper template 2-2 is fixedly installed on the lower end face of the base plate 2-1. The front and rear ends of the base plate 2-1 are also fixed with guide posts 2-3 extending downward. The front and rear ends of the lower template 4 have guide holes 4-2 penetrating the plate body. During the process of the upper template 2-2 and the lower template 4 closing and pressing the rivet C on the leaf spring, the lower end of the guide post 2-3 moves through the corresponding guide hole 4-2.

[0035] More preferably, the lower end face of the upper template 2-2 has four circular grooves 2-2a, and the upper end face of the lower template 4 has four circular grooves 4-1. The four circular grooves 2-2a and the four circular grooves 4-1 correspond one-to-one with the rivets C on the leaf spring. The top surface of the circular groove 2-2a and the bottom surface of the circular groove 4-1 are both designed as concave arc surfaces with the concave side facing the opening end.

[0036] More preferably, a workpiece support plate 3 is also installed on the upper surface of the workbench 1-4. The lower template 4, positioning block 1 5, and positioning block 2 6 are fixedly fixed on the upper surface of the workpiece support plate 3 from left to right at corresponding intervals. The upper end of positioning block 1 5 has a positioning groove 5-1 with an upward opening for embedding the positioning groove at the position of the vertical side A-2 on the leaf spring. The upper surface of positioning block 2 6 has a threaded blind hole 6-1 coaxial with the longitudinal through hole 1 A-1 on the leaf spring and a locking pin 6-2 screwed into the threaded blind hole 6-1. Specifically, the locking pin 6-2 includes a stud 6-2a that is screwed into the threaded blind hole 6-1 and an end cap 6-2b vertically fixed to the upper end of the stud 6-2a, and the outer diameter of the end cap 6-2b is greater than the inner diameter of the longitudinal through hole 1 A-1 on the leaf spring.

[0037] Preferably, the tubular heating assembly 7-2 includes a spiral heating copper tube 7-2a and a quartz tube 7-2b inserted inside the spiral heating copper tube 7-2a, wherein the heating cavity 7-3 is formed inside the quartz tube 7-2b.

[0038] More preferably, it also includes a temperature monitoring component 8, which includes a bracket 8-1 and an infrared temperature controller 8-2. The bracket 8-1 has a "7"-shaped structure, and the lower end of the bracket 8-1 is vertically fixed to the front side of the upper end of the high-frequency heater 7, and the upper end extends to the top of the spiral heating copper tube 7-2a. The infrared temperature controller 8-2 is installed on the lower side of the upper end of the bracket 8-1.

[0039] The working principle of the riveting processing equipment for leaf springs in locomotive braking systems according to this utility model is as follows:

[0040] Step 1: Set the working temperature of the tubular heating component 7-2 on the high-frequency heater 7 and start the heating button. Take two rivets (the outer diameter of the rivet is slightly less than the inner diameter of the corresponding longitudinal through hole 2 on the left end of the leaf spring body A and the mounting base B). Insert one rivet into one end of the heating cavity 7-3 on the high-frequency heater 7 and insert the other rivet into the other end of the heating cavity 7-3 on the high-frequency heater 7.

[0041] Step 2: In the initial state, the upper template 2-2 is located on the upper side and is separated from the lower template 4. Loosen and remove the locking pin 6-2. Place the leaf spring body A on the lower template 4, positioning block 1 5, and positioning block 2 6. Place the mounting base B on the lower template 4, and insert the left end of the leaf spring body A into the mounting groove B-1 of the mounting base B. Insert the vertical side A-2 of the middle of the leaf spring body A into the positioning groove 5-1 on the positioning block 1 5. Insert the stud 6-2 on the locking pin 6-2. A. Passing through the longitudinal through hole A-1 at the right end of the blade spring body A and screwed into the threaded blind hole 6-1 on the positioning block 6, so that the right end of the blade spring body A is fixed to the upper end face of the positioning block 6 by the locking pin 6-2. Take two positioning pins, insert one positioning pin into the corresponding set of longitudinal through holes 2 on the left rear side of both the left end of the blade spring body A and the mounting base B, and insert the other positioning pin into the corresponding set of longitudinal through holes 2 on the right front side of both the left end of the blade spring body A and the mounting base B (see Appendix). Figure 8 );

[0042] Step 3: When the infrared temperature controller 8-2 on the temperature monitoring component 8 detects that the temperature of the spiral heating copper tube 7-2a has reached the set working temperature, the high-frequency heater 7 stops heating and issues a prompt signal. At this time, the operator uses pliers to remove one rivet from one end of the heating chamber 7-3 and insert it into the left end of the leaf spring body A and the mounting base B, which are located in the corresponding longitudinal through holes on the left front side. Similarly, the operator uses pliers to remove the other rivet from the other end of the heating chamber 7-3 and insert it into the left end of the leaf spring body A and the mounting base B, which are located in the corresponding longitudinal through holes on the right rear side.

[0043] Step 4: Activate the working button of punch press 1. The punching rod 1-3 extends downwards, driving the upper die assembly 2 downwards. First, the guide posts 2-3 at the front and rear ends are inserted into the corresponding guide holes 4-2 on the lower die plate 4. Then, the punching rod 1-3 continues to extend downwards, causing the upper die plate 2-2 and the lower die plate 4 to close, pressing and deforming the two rivet posts at their upper and lower ends to form rivets C (see Appendix). Figures 9-10After the set stamping time is reached, the stamping rod 1-3 retracts upward to reset. During this stamping and riveting process, the operator uses clamps to reposition two rivet pins inside the heating chamber 7-3 of the high-frequency heater 7. During the stamping and riveting process, the two positioning pins limit the left end of the leaf spring body A and the mounting seat B, effectively preventing the two from shifting positions and ensuring good correspondence between the two after riveting.

[0044] Step 5: Remove the two positioning pins. When the infrared temperature controller 8-2 on the temperature monitoring component 8 detects that the temperature of the spiral heating copper tube 7-2a has reached the set working temperature, the high-frequency heater 7 stops heating and issues a prompt signal. The operator uses pliers to remove one rivet from one end of the heating chamber 7-3 and inserts it into the corresponding longitudinal through hole two on the left rear side of both the left end of the leaf spring body A and the mounting seat B. Similarly, the operator uses pliers to remove the other rivet from the other end of the heating chamber 7-3 and inserts it into the corresponding longitudinal through hole two on the right front side of both the left end of the leaf spring body A and the mounting seat B. Start the working button of the punch press 1 to press the two rivets into the corresponding rivets C. After the set punching time is reached, the punching rod 1-3 retracts upward to reset, completing a complete riveting cycle of the leaf spring body A and the mounting seat B.

[0045] This utility model discloses a riveting processing equipment for leaf springs in locomotive braking systems, comprising a punch press riveting element and a high-frequency heating element. During operation, only one operator is required to efficiently coordinate the loading of the leaf spring body and mounting base onto the punch press, as well as the loading of the rivet into the heating chamber of the high-frequency heater. Compared to the traditional riveting method using a hydraulic press and flame heating, this method saves half the labor cost, thus reducing labor expenses. The high-frequency heater heats the rivet to the set temperature (e.g., 650℃) in just a few seconds, reducing the heating time to one-third that of flame heating, significantly improving the heating efficiency. Furthermore, the high-frequency heater ensures uniform overall temperature of the rivet, effectively preventing micro-cracks on the rivets during the riveting process. This helps ensure the leaf spring's stability and longevity during later use, extending its overall service life. The high-frequency heater's heating chamber can simultaneously heat two rivets, meaning two rivets can be riveted in a single press, further improving the riveting efficiency of both the leaf spring body and the mounting base.

[0046] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A riveting processing device for leaf springs in a locomotive braking system, characterized in that, The assembly includes a punch press (1), an upper die assembly (2), a lower die plate (4), and a high-frequency heater (7). The punch press (1) has a storage cavity (1-1) with an opening facing the right side. The top plate (1-2) of the storage cavity (1-1) has a punching rod (1-3) that can reciprocate along the longitudinal direction. The lower end face of the punching rod (1-3) is equipped with an upper die plate (2-2) for pressing the upper end face of the rivet (C) on the leaf spring. The lower end of the punch press (1) has a worktable (1-4) extending to the bottom of the storage cavity (1-1). The upper end face of the worktable (1-4) is equipped with a lower die plate (4) for pressing the lower end face of the rivet (C) on the leaf spring. The upper die plate (2-2) and the lower die plate (4) correspond to each other. The high-frequency heater (7) is located adjacent to the right side of the storage cavity (1-1) on the punch press (1). The high-frequency heater (7) has two heating electrodes (7-1) extending to the front side outside. The free ends of the two heating electrodes (7-1) are equipped with tubular heating components (7-2) located in the horizontal direction. The tubular heating components (7-2) have heating cavities (7-3) that penetrate both end faces inside. The length of the heating cavity (7-3) is ≥ twice the length of the rivet (C) on the leaf spring.

2. The riveting equipment for leaf springs in a locomotive braking system as described in claim 1, characterized in that, It also includes an upper mold assembly (2), which includes a base plate (2-1). The upper end face of the base plate (2-1) is vertically fixed to the lower end face of the stamping rod (1-3). The upper template (2-2) is fixedly installed on the lower end face of the base plate (2-1). The front and rear ends of the base plate (2-1) are also fixed with guide posts (2-3) extending downward. The front and rear ends of the lower template (4) have guide through holes (4-2) that penetrate the plate body. During the process of the upper template (2-2) and the lower template (4) closing and pressing the rivet (C) on the leaf spring, the lower end of the guide post (2-3) is movably inserted into the corresponding guide through hole (4-2).

3. The riveting equipment for leaf springs in a locomotive braking system as described in claim 2, characterized in that, The upper template (2-2) has four circular grooves (2-2a) on its lower end face, and the lower template (4) has four circular grooves (4-1) on its upper end face. The four circular grooves (2-2a) and the four circular grooves (4-1) correspond one-to-one with the rivets (C) on the leaf spring. The top surface of the circular groove (2-2a) and the bottom surface of the circular groove (4-1) are both designed as concave arc surfaces with the concave side facing the opening end.

4. The riveting equipment for leaf springs in a locomotive braking system as described in claim 3, characterized in that, The workbench (1-4) is also equipped with a workpiece support plate (3). The workpiece support plate (3) is fixed with the lower template (4), positioning block one (5) and positioning block two (6) at intervals from left to right. The upper end of the positioning block one (5) has a positioning groove (5-1) with an upward opening for embedding the vertical side (A-2) of the positioning leaf spring. The upper end of the positioning block two (6) has a threaded blind hole (6-1) coaxial with the longitudinal through hole one (A-1) on the leaf spring and a locking pin (6-2) screwed into the threaded blind hole (6-1).

5. The riveting equipment for leaf springs in a locomotive braking system as described in any one of claims 1 to 4, characterized in that, The tubular heating assembly (7-2) includes a spiral heating copper tube (7-2a) and a quartz tube (7-2b) passing through the interior of the spiral heating copper tube (7-2a), wherein the heating cavity (7-3) is formed inside the quartz tube (7-2b).

6. The riveting equipment for leaf springs in a locomotive braking system as described in claim 5, characterized in that, It also includes a temperature monitoring component (8), which includes a bracket (8-1) and an infrared temperature controller (8-2). The bracket (8-1) has a "7"-shaped structure, and the lower end of the bracket (8-1) is vertically fixed to the front side of the upper end of the high-frequency heater (7), and the upper end extends to the top of the spiral heating copper tube (7-2a). The infrared temperature controller (8-2) is installed on the lower side of the upper end of the bracket (8-1).

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