A rail end milling apparatus and method of use thereof

Abstract

The application discloses a kind of steel rail end milling equipment, it is related to track component processing technical field, including rack, the rack is fixedly connected with processing table, the steel rail groove of positioning steel rail is opened in the processing table, the inside of the steel rail groove is connected with clamping conveying assembly, the rack is connected with fixed table, the fixed table is located above the processing table and is connected with tool rest and tool, the bottom of the processing table is connected with liquid tank, the circulation cooling assembly is connected in the liquid tank, the clamping conveying assembly includes multiple conveying units, multiple conveying units in both sides are jointly clamped in the middle part of steel rail, the application also discloses the method using above-mentioned equipment.Advantages are, when milling machining is carried out to the end face of steel rail, the effect of realizing clamping conveying to steel rail is realized, on the one hand, the work of milling cutter is facilitated, on the other hand, the stability of steel rail during processing is improved, and the position of steel rail is circulated cooling, to avoid that the quality of itself is influenced by long time high temperature at processing position.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel rail processing, in particular to a steel rail end milling device and a method thereof. BACKGROUND

[0002] The steel rail is divided into a rail head, a rail waist and a rail bottom.

[0003] In the processing of the steel rail, the end face of the rail bottom needs to be milled. In the prior art, the steel rail is inverted on a processing table, the rail head and the rail waist are limited by a groove, and then the milling cutter is moved or the steel rail is moved by a lifting device for milling. This has the following disadvantages. On the one hand, the length of the steel rail is large in actual processing. When the above-mentioned method is used for processing, the milling cutter needs to be moved for a long distance. After a long distance movement, the position of the cutter changes slightly, thereby reducing the milling precision. When the steel rail is moved manually for processing, it is inconvenient. In the milling process, although the groove can limit the steel rail, the vibration generated during the milling process makes the steel rail unstable during processing, thereby further affecting the milling precision. Therefore, the present application provides a steel rail end milling device and a method thereof. SUMMARY

[0004] The present application aims to solve the problems in the prior art and provides a steel rail end milling device and a method thereof.

[0005] A steel rail end milling device comprises a rack, a processing table fixedly connected to the rack, a steel rail groove for positioning the steel rail in the processing table, a clamping and conveying assembly connected to the inner side of the steel rail groove, a fixed table connected to the rack, a tool holder and a cutter connected to the fixed table above the processing table, a liquid tank connected to the bottom of the processing table, and a circulating cooling assembly connected to the liquid tank.

[0006] In the steel rail end milling device, the clamping and conveying assembly comprises a plurality of conveying units, the conveying units are composed of conveying wheels and friction layers connected to the outer sides of the conveying wheels, the conveying units are arranged on both sides of the steel rail groove, the conveying units on the same side are arranged at equal distances, the conveying units on both sides are jointly clamped at the middle part of the steel rail, a friction wheel is connected to the side of each conveying unit away from the steel rail, the friction wheel is frictionally connected to the conveying unit when the friction wheel and the conveying unit abut on the side, a rotating shaft one is fixedly connected to the center of rotation of each friction wheel, a chain wheel is connected to each rotating shaft one, a plurality of chain wheels are connected by a chain, and a driving motor is connected to one chain wheel.

[0007] In the aforementioned rail end milling equipment, the circulating cooling assembly includes a heat dissipation channel formed on the side of the rail groove. The heat dissipation channel has a square cross-section. Multiple connecting slots are formed on the side of the heat dissipation channel closest to the rail groove. Each connecting slot has a conveying unit connected to it. Two heat dissipation channels are connected to two circulating pipes. Each circulating pipe is connected to a one-way valve. The bottom of each of the two circulating pipes is connected to an inlet pipe and an outlet pipe, respectively. The bottom of both the inlet pipe and the outlet pipe is connected to a liquid tank. Solenoid valves are installed in the inlet pipe and the outlet pipe. The inlet pipe is connected to a liquid pump.

[0008] In the above-mentioned rail end milling equipment, each of the conveying units is connected to a sealing unit. The sealing unit includes a square sleeve. The conveying wheel in the conveying unit is rotatably connected to the square sleeve through a rotating shaft. The square sleeve is slidably connected in the connecting groove. A limiting block is connected to each side of the square sleeve. A limiting groove that mates with the limiting block is opened on each side of the connecting groove. A limiting spring is connected to the part of the limiting block located in the limiting groove. The other end of the limiting spring is connected to the limiting groove.

[0009] In the above-mentioned rail end milling equipment, each of the rotating shafts passes through the processing table and through the top wall of the liquid tank, and a stirring blade is fixedly connected to one end of each rotating shaft located inside the liquid tank.

[0010] In the above-mentioned rail end milling equipment, the friction layer is made of rubber material with a high coefficient of thermal expansion, and the frame is connected to the fixed platform by multiple bolts.

[0011] A method of using the above-mentioned equipment includes the following steps: The rail is lifted as a whole by a lifting device and loaded onto the side end of the rail groove on the processing table away from the cutting tool, with the bottom end face of the rail portion positioned below the cutting tool. Then, the cutting tool, drive motor, and hydraulic pump are started, causing the cutting tool to mill the bottom end face of the rail. When the rail enters the rail groove of the processing table, it squeezes the conveyor wheels in the conveying units on both sides, causing multiple conveyor wheels to move to both sides until they abut against friction wheels. This chain drive structure, including the chain and sprockets, drives multiple friction wheels to rotate, thereby achieving the function of moving the rail through the rotation of multiple conveyor wheels. The hydraulic pump delivers liquid from the tank upwards to the circulation pipe through the inlet pipe. The annular liquid flow channel, composed of two circulation pipes, two heat dissipation channels, and multiple one-way valves, achieves the function of circulating heat dissipation during the rail processing.

[0012] Compared with existing technologies, the advantages of this invention are:

[0013] 1. In use, this invention can feed and transport the rail while the end face of the rail is being milled by the milling cutter through multiple conveying units. This allows for the milling of long rails without changing the position of the cutting tool, improving machining accuracy and facilitating operation.

[0014] 2. During use, friction drive is adopted. The conveying function is achieved through the friction layer on both sides of the rail web and the conveying wheel. Since the friction layer is made of rubber material with a high coefficient of thermal expansion, the multiple conveying units on the milling cutter working surface will increase the contact pressure with the rail web under the effect of thermal expansion during processing. This improves the stability of the rail during milling and avoids the problem of workpiece shaking that is easily caused when the rail is positioned by simply using the rail groove, thus improving the processing accuracy.

[0015] 3. In use, this invention provides two heat dissipation channels at the rail web of the rail groove, which are connected by two circulation pipes and form a circulation path under the action of a one-way valve. This allows the rail web to be circulated and cooled by the liquid pump, improving the cooling effect during milling. The multiple rotating shafts in the chain drive mechanism drive the connected stirring blades to rotate in the liquid tank, which can increase the cooling speed of the liquid in the tank, improve the circulation cooling effect, and facilitate use. Attached Figure Description

[0016] Figure 1 This is a first-view structural schematic diagram of a rail end milling device proposed in this invention.

[0017] Figure 2 This is a schematic diagram of the structure from a second perspective in a rail end milling device proposed in this invention.

[0018] Figure 3 This is a cross-sectional view of a rail processed in a rail end milling device proposed in this invention.

[0019] Figure 4 This is a cross-sectional view of a heat dissipation channel in a rail end milling device proposed in this invention.

[0020] Figure 5 This is a schematic diagram of the chain drive structure in a rail end milling device proposed in this invention.

[0021] In the diagram: 1. Frame, 2. Processing table, 3. Rail groove, 31. Rail head, 32. Rail web, 33. Rail bottom, 4. Clamping and conveying assembly, 41. Conveying unit, 411. Conveying wheel, 412. Friction layer, 42. Friction wheel, 43. Rotating shaft one, 44. Sprocket, 45. Chain, 46. Drive motor, 5. Fixed platform, 6. Tool holder, 7. Tool, 8. Liquid tank, 9. Circulating cooling assembly, 911. Heat dissipation channel, 92. Connecting groove, 93. Circulating pipe, 94. Liquid outlet pipe, 95. Liquid inlet pipe, 96. Liquid pump, 10. Sealing unit, 101. Square sleeve, 102. Limiting block, 103. Limiting groove, 104. Limiting spring, 11. Stirring blade. Detailed Implementation

[0022] Reference Figures 1-5 A rail end milling device includes a frame 1, a processing table 2 fixedly connected to the frame 1, and a rail groove 3 for positioning the rail in the processing table 2. The processed rail is as follows: Figure 3 As shown, it is divided into rail head 31, rail web 32 and rail bottom 33. During end face processing, the rail bottom 33 needs to be upside down in the rail groove 3 to process the lower end face of the rail bottom 33. The inner side of the rail groove 3 is connected to the clamping and conveying assembly 4. The frame 1 is connected to the fixed platform 5. The fixed platform 5 is located above the processing table 2 and is connected to the tool holder 6 and the cutting tool 7. The bottom of the processing table 2 is connected to the liquid tank 8, and the liquid tank 8 is connected to the circulating cooling assembly 9.

[0023] The clamping and conveying assembly 4 includes multiple conveying units 41, each consisting of a conveying wheel 411 and a friction layer 412 connected to the outside of the conveying wheel 411. The multiple conveying units 41 are located on both sides of the rail groove 3, with the conveying units 41 on the same side arranged at equal distances. The multiple conveying units 41 on both sides are clamped together in the middle of the rail. Each conveying unit 41 has a friction wheel 42 connected to the side away from the rail. When the friction wheel 42 and the conveying unit 41 are in contact on the side, they are connected by friction transmission. The rotation center of each friction wheel 42 is fixedly connected to a rotating shaft 43. Each rotating shaft 43 is connected to a sprocket 44. The multiple sprockets 44 are connected by a chain 45. One sprocket 44 is connected to a drive motor 46.

[0024] The circulating cooling assembly 9 includes a heat dissipation channel 91 opened on the side of the rail groove 3. The heat dissipation channel 91 has a square cross-section. Multiple connecting slots 92 are opened on the side of the heat dissipation channel 91 near the rail groove 3. Each connecting slot 92 has a conveying unit 41 connected to it. The two heat dissipation channels 91 are connected to two circulating pipes 93. Each circulating pipe 93 is connected to a one-way valve. The bottom of the two circulating pipes 93 is connected to an inlet pipe 95 and an outlet pipe 94, respectively. The bottom of the inlet pipe 95 and the outlet pipe 94 are connected to the liquid tank 8. Solenoid valves are installed in the inlet pipe 95 and the outlet pipe 94. The inlet pipe 95 is connected to a liquid pump 96.

[0025] Each conveying unit 41 is connected to a sealing unit 10. The sealing unit includes a square sleeve 101. The conveying wheel 411 in the conveying unit 41 is rotatably connected to the square sleeve 101 through a rotating shaft 413. The square sleeve 101 is slidably connected to the connecting groove 92. A limiting block 102 is connected to each side of the square sleeve 101. A limiting groove 103 that cooperates with the limiting block 102 is opened on each side of the connecting groove 92. A limiting spring 104 is connected to the part of the limiting block 102 located in the limiting groove 103. The other end of the limiting spring 104 is connected to the limiting groove 103. Each rotating shaft 43 passes through the processing table 2 and through the top wall of the liquid tank 8. A stirring blade 11 is fixedly connected to one end of each rotating shaft 43 located in the liquid tank 8. The friction layer 412 is made of rubber material with a high coefficient of thermal expansion. The frame 1 is connected to the fixed table 5 by multiple bolts.

[0026] The method of using the above-mentioned equipment in this invention is as follows: the entire rail is lifted by a hoist and loaded onto the side end of the rail groove 3 away from the cutting tool 7 on the processing table 2. The rail web 32 is in contact with multiple conveying units 41 on both sides, and the lower end face of the rail bottom is located below the cutting tool 7, that is, the entire rail is inverted in the rail groove 3. Then, the cutting tool 7, drive motor 46 and hydraulic pump 96 are started, so that the cutting tool 7 uses a milling cutter to mill the lower end face of the rail. Before the rail enters the rail groove 3, the conveying units 41 on both sides are disengaged from the friction wheel 42. At this time, no friction transmission occurs. This reduces the problem of the conveying units 41 being squeezed and worn in the storage state, which is beneficial to improving the service life of the conveying units 41. As the rail enters the rail groove 3 of the processing table 2, it squeezes the conveyor wheels 411 in the conveyor units 41 on both sides, causing multiple conveyor wheels 411 to move to both sides until they come into contact with the friction wheels 42. Thus, under the rotation of the drive motor 46 and the operation of the chain drive structure including the chain 45 and the sprocket 44, multiple friction wheels 42 are driven to rotate. The multiple friction wheels 42 are connected to the conveyor unit 41 by friction transmission, and the conveyor unit 41 is squeezed by the rail. Therefore, multiple conveyor wheels 411 will rotate in the same direction, driving the rail to move in the rail groove 3. A drive motor 46 is set on each side, and the rotation direction of the drive motor 46 is opposite, so that the conveyor units 41 on both sides jointly drive the rail to move.

[0027] The liquid pump 96 pumps the liquid in the liquid tank 8 upwards through the inlet pipe 95 to the circulation pipe 93. The annular liquid flow channel, formed by the two circulation pipes 93, two heat dissipation channels 91, and multiple one-way valves, effectively cools the rails in the rail groove 3 during processing. Furthermore, since the heat dissipation channels 91 are connected to the conveying unit 41 and the friction wheel 42, the flowing liquid also dissipates heat from the clamping and conveying assembly 4. This prevents the rail web 32 from overheating due to friction during conveying, which could negatively impact rail performance. Meanwhile, during milling... During the milling process, the cutting heat generated by the cutting will make the temperature of the machined part higher than that of other parts. Therefore, the temperature of the conveying unit 41 at the machined surface is relatively high. Furthermore, since the friction layer 412 is made of rubber material with a high coefficient of thermal expansion, the multiple conveying units near the working position of the tool 7 will increase the contact pressure with the rail web 32 under the action of thermal expansion during the machining process. This will increase the pressure on the rail during milling, thereby improving the stability of the machining process and avoiding the problem of workpiece shaking during machining when the rail is positioned solely by the rail groove 3. This will also improve the machining accuracy.

[0028] As is known from common technical knowledge, this invention can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not the only ones. All modifications within the scope of this invention or its equivalents are included in this invention.

Claims

1. A rail end milling device, comprising a frame (1), characterized in that: The frame (1) is fixedly connected to a processing table (2), and the processing table (2) has a rail groove (3) for positioning rails. The inner side of the rail groove (3) is connected to a clamping and conveying assembly (4). The frame (1) is connected to a fixed platform (5). The fixed platform (5) is located above the processing table (2) and is connected to a tool holder (6) and a cutting tool (7). The bottom of the processing table (2) is connected to a liquid tank (8), and a circulating cooling assembly (9) is connected to the liquid tank (8). The clamping and conveying assembly (4) includes multiple conveying units (41). Each of the multiple conveying units (41) consists of a conveying wheel (411) and a friction layer (412) connected to the outside of the conveying wheel (411). The multiple conveying units (41) are located on both sides of the rail groove (3). The conveying units (41) on the same side are arranged at equal distances. The multiple conveying units (41) on both sides are clamped together in the middle of the rail. Each conveying unit (41) is connected to a friction wheel (42) on the side away from the rail. When the friction wheel (42) and the conveying unit (41) are in contact on the side, they are connected by friction transmission. The rotation center of each friction wheel (42) is fixedly connected to a rotating shaft (43). Each rotating shaft (43) is connected to a sprocket (44). The multiple sprockets (44) are connected by a chain (45). One of the sprockets (44) is connected to a drive motor (46). The circulating cooling assembly (9) includes a heat dissipation channel (91) opened on the side of the rail groove (3). The cross-section of the heat dissipation channel (91) is set as a square structure. Multiple connecting slots (92) are opened on the side of the heat dissipation channel (91) near the rail groove (3). Each connecting slot (92) has a conveying unit (41) connected to it. The two heat dissipation channels (91) are connected to two circulating pipes (93). Each circulating pipe (93) is connected to a one-way valve. The bottom of the two circulating pipes (93) is respectively connected to an inlet pipe (95) and an outlet pipe (94). The bottom of the inlet pipe (95) and the outlet pipe (94) are connected to the liquid tank (8). Solenoid valves are provided in the inlet pipe (95) and the outlet pipe (94). The inlet pipe (95) is connected to a liquid pump (96). Each of the conveying units (41) is connected to a sealing unit (10), the sealing unit includes a square sleeve (101), the conveying wheel (411) in the conveying unit (41) is rotatably connected to the square sleeve (101) through a rotating shaft (413), the square sleeve (101) is slidably connected to the connecting groove (92), a limiting block (102) is connected to each side of the square sleeve (101), a limiting groove (103) that cooperates with the limiting block (102) is opened on each side of the connecting groove (92), a limiting spring (104) is connected to the part of the limiting block (102) located in the limiting groove (103), and the other end of the limiting spring (104) is connected to the limiting groove (103); The friction layer (412) is made of rubber material with a high coefficient of thermal expansion, and the frame (1) is connected to the fixed platform (5) by multiple bolts.

2. The rail end milling equipment according to claim 1, characterized in that: Each of the said rotating shafts (43) passes through the processing table (2) and through the top wall of the liquid tank (8), and each of the said rotating shafts (43) is fixedly connected to a stirring blade (11) at one end inside the liquid tank (8).

3. A method of using the device according to any one of claims 1-2, characterized in that, The process includes the following steps: The rail is lifted as a whole by a hoist and loaded onto the side end face of the rail groove (3) away from the cutter (7) on the processing table (2), with the bottom end face of the rail portion positioned below the cutter (7). Then, the cutter (7), drive motor (46), and hydraulic pump (96) are activated, causing the cutter (7) to mill the bottom end face of the rail on the lower side. When the rail enters the rail groove (3) of the processing table (2), it squeezes the conveyor wheels (411) in the conveying units (41) on both sides, causing multiple conveyor wheels (411) to... The two sides move to contact the friction wheel (42), and the chain drive structure including the chain (45) and sprocket (44) will drive the multiple friction wheels (42) to rotate, thereby realizing the function of driving the rail to move by rotating the multiple conveying wheels (411). The liquid pump (96) transports the liquid in the liquid tank (8) upward to the circulation pipe (93) through the liquid inlet pipe (95). Through the two circulation pipes (93), the two heat dissipation channels (91) and the annular liquid flow channel formed by multiple one-way valves, the function of circulating heat dissipation during the rail processing is realized.

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