Rail end heat treatment production line

Abstract

The utility model discloses a rail heel end heat treatment production line, comprising a clamping mechanism, a cooling device, and a heating device arranged in sequence along an X-axis direction. The production line also comprises a loading mechanism and a unloading mechanism arranged along a Y-axis direction. The loading mechanism and the unloading mechanism are respectively located on both sides of the clamping mechanism. The loading mechanism can move back and forth along the Y-axis direction to transport the rail from a loading area to a working area of ​​the clamping mechanism. The clamping mechanism is used to control the rail from the loading area to move back and forth along the X-axis direction so that the heel end of the rail passes through the cooling device and enters the heating device, or exits the heating device and enters the cooling device; the unloading mechanism can move back and forth along the Y-axis direction to transport the rail with the heel end entering the cooling device to the unloading area. The cooling device moves with the rail during the unloading process. The production line can not only improve the efficiency of the heat treatment of the rail heel end, but also improve the heat treatment quality.

Description

Technical Field

[0001] The utility model relates to a rail heat treatment technology, in particular to a rail heel end heat treatment production line. Background Art

[0002] With the rapid development of railways towards high speed and heavy load, the line transportation density is gradually increasing, and the requirements for the smoothness of train operation are becoming higher and higher. In order to further extend the service life of the line rails and improve the safety and reliability of operation, both the turnout and the main line need to use online heat-treated rails. At the same time, the asymmetric section point rails, heart rails and rails for connecting different rail types, which are key components of the turnout that play a guiding and conversion role, are partially hot-forged into another standard rail that can be easily connected to the line. In order to improve the heat treatment quality of the heel end of the rail after forging, the industry currently generally adopts the method of full-section heating and continuous air jet cooling to strengthen the treatment of the heel end of the rail. However, it is difficult for the existing heat treatment production line to achieve continuous production of heating and cooling of the heel end of the rail, resulting in the inability to balance the quality and efficiency of the heat treatment of the heel end of the rail. Utility Model Content

[0003] The utility model provides a rail heel end heat treatment production line to solve the technical problem that the previous rail heel end heat treatment production line cannot well balance the quality and efficiency.

[0004] The utility model provides a rail heel end heat treatment production line, comprising a clamping mechanism, a cooling device, and a heating device arranged in sequence along the X-axis direction, the production line also comprises a loading mechanism and a unloading mechanism arranged along the Y-axis direction, the loading mechanism and the unloading mechanism are respectively located on both sides of the clamping mechanism, the loading mechanism can move back and forth along the Y-axis direction, and is used to transport the rail from the loading area to the working area of ​​the clamping mechanism, the clamping mechanism is used to control the rail from the loading area to move back and forth along the X-axis direction, so that the heel end of the rail passes through the cooling device and enters the heating device, or exits the heating device and enters the cooling device; the unloading mechanism can move back and forth along the Y-axis direction, and is used to transport the rail with the heel end entering the cooling device to the unloading area, and the cooling device moves with the rail during the unloading process.

[0005] Furthermore, distance sensors are installed at the inlet and outlet of the heating device for adjusting the position of the heel end of the rail in the heating device.

[0006] Furthermore, an air nozzle opening downward is provided in the cooling device, and compressed air ejected from the air nozzle acts on the heel end of the cooling rail.

[0007] Furthermore, the cooling device can move back and forth along the X-axis direction to adjust the compressed air ejected from the air nozzle to be aligned with the heel end of the rail (the position and distance of the heel end of the rail).

[0008] Furthermore, the cooling device can return to the initial position along the Y-axis direction to cool the heel end of the next rail.

[0009] Furthermore, the movement of the cooling device in the X-axis or Y-axis direction is driven by a driving motor.

[0010] Furthermore, the cooling device is driven by a driving motor to move along the slide slot in the X-axis or Y-axis direction.

[0011] Furthermore, a loading rack is fixed in the loading area for supporting the rails before heat treatment.

[0012] Furthermore, the X-axis direction also includes a support frame for supporting the rails during the heat treatment process.

[0013] Furthermore, the unloading area is fixed with an unloading rack for supporting the heat-treated rails.

[0014] The utility model has the following beneficial effects:

[0015] The feeding mechanism of the rail heel end heat treatment production line provided by the utility model can transport the rail from the feeding area to the working area of ​​the clamping mechanism, return to the initial position after the feeding mechanism is completed, and transport the next rail, the clamping mechanism clamps the rail and advances along the X-axis direction, so that the heel end enters the heating device and starts heating, after the heating is completed, the clamping mechanism clamps the rail and returns along the X-axis direction, so that the heel end exits the heating device and enters the cooling device, after the clamping mechanism is completed, returns to the initial position to meet the next rail transported by the feeding mechanism, at this time, the cooling device sprays air to cool the heel end, the unloading mechanism transports the rail with the heel end entering the cooling device to the unloading area, the cooling device moves with the rail during the unloading process, and continuously keeps cooling the heel end, the cooling device and the unloading mechanism both return to the initial position after completion, and meet the next rail, this reciprocating cycle action method can not only significantly improve the efficiency of the off-line heat treatment of the heel end of the rail, but also can shorten the cooling time after heating, reduce the slow diffusion of heat, improve the temperature gradient per unit distance per unit time, so as to reduce the width of the heat affected zone of the local heel end heat treatment, that is, efficiency and quality are achieved at the same time.

[0016] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0018] Figure 1 It is a schematic diagram of a rail heel end heat treatment production line according to a preferred embodiment of the utility model.

[0019] Legend: 1. Loading rack; 2-loading mechanism; 3-clamping mechanism; 4-cooling device; 5-heating device; 6-chute; 7-unloading mechanism; 8-unloading rack; 9-distance sensor; 10-support frame. DETAILED DESCRIPTION

[0020] In order to make the invention purpose, technical scheme and beneficial technical effect of the utility model clearer, the utility model is further described in detail in combination with the embodiments below. It should be understood that the embodiments described in this specification are only for explaining the utility model, not for limiting the utility model.

[0021] For simplicity, only some numerical ranges are explicitly disclosed herein. However, any lower limit can be combined with any upper limit to form an unambiguous range; and any lower limit can be combined with other lower limits to form an unambiguous range, and any upper limit can be combined with any other upper limit to form an unambiguous range. In addition, although not explicitly stated, each point or single value between the range endpoints is included in the range. Thus, each point or single value can be combined with any other point or single value as its own lower limit or upper limit or with other lower limits or upper limits to form an unambiguous range.

[0022] In the description of this article, it should be noted that, unless otherwise specified, “above” and “below” are inclusive of the number, and the “multiple” in “one or more” means two or more, and the “multiple” in “one or more” means two or more.

[0023] like Figure 1 As shown, an embodiment of the present application provides a rail heel end heat treatment production line, comprising a clamping mechanism 3, a cooling device 4, and a heating device 5 arranged in sequence along the X-axis direction, the production line also comprising a loading mechanism 2 and a unloading mechanism 7 arranged along the Y-axis direction, the loading mechanism 2 and the unloading mechanism 7 are respectively located on both sides of the clamping mechanism 3, the loading mechanism 2 can move back and forth along the Y-axis direction, and is used to transport the rail from the loading area to the working area of ​​the clamping mechanism 3, the clamping mechanism 3 is used to control the rail from the loading area to move back and forth along the X-axis direction, so that the heel end of the rail passes through the cooling device 4 and enters the heating device 5, or exits the heating device 5 and enters the cooling device 4; the unloading mechanism 7 can move back and forth along the Y-axis direction, and is used to transport the rail with the heel end entering the cooling device 4 to the unloading area, and the cooling device 4 moves with the rail during the unloading process.

[0024] In the embodiment of the present application, the clamping mechanism 3 can complete the clamping of the rail in its working area and control the rail to move back and forth along the X-axis direction, so the feeding mechanism 2 needs to transport the rail from the feeding area to the working area of ​​the clamping mechanism 3.

[0025] In the embodiment of the present application, both ends of the cooling device 4 along the X-axis direction are designed to be open, the inlet and outlet of the heating device 5 face the cooling device 4, and the heel end of the rail can pass through the cooling device 4 and enter the heating device 5 from the inlet and outlet.

[0026] In the embodiment of the present application, the cooling device 4 moves with the rail during the unloading process. The cooling device 4 can stop at any position on the way to the unloading area following the steel pipe, or it can stop only after following the steel pipe to the unloading area. The specific position can be designed according to the actual cooling needs. For example, when the required cooling time is longer, the stop position of the cooling device 4 can be set in the unloading area. When the required cooling time is shorter, the stop position of the cooling device 4 can be set in the middle of the unloading area. After the cooling device 4 stops, it returns to the initial position to prepare for cooling the next rail, and the unloading device will return to the initial position to meet the next rail after sending the cooled rail to the unloading area.

[0027] According to the embodiment of the present application, the feeding mechanism 2 of the rail heel end heat treatment production line can transport the rail from the feeding area to the working area of ​​the clamping mechanism 3. After the feeding mechanism 2 completes the action, it returns to the initial position and transports the next rail. The clamping mechanism 3 clamps the rail and moves forward along the X-axis direction, so that the heel end enters the heating device 5 and starts heating. After the heating is completed, the clamping mechanism clamps the rail and returns along the X-axis direction, so that the heel end exits the heating device 5 and enters the cooling device 4. After the clamping mechanism 3 completes the action, it returns to the initial position to meet the next rail transported by the feeding mechanism 2. At this time, the cooling device 4 sprays air on the heel end. Cooling, the unloading mechanism 7 transports the rail with the heel end entering the cooling device 4 to the unloading area, and the cooling device 4 moves together with the rail during the unloading process to continuously keep the cooling of the heel end. After completion, the cooling device 4 and the unloading mechanism 7 return to the initial position to greet the next rail. This reciprocating cycle action method can not only significantly improve the efficiency of offline heat treatment of the heel end of the rail, but also shorten the cooling time after heating and reduce the slow diffusion of heat, thereby increasing the temperature gradient per unit distance per unit time, so as to reduce the width of the heat affected zone of the local heel end heat treatment, that is, efficiency and quality are achieved simultaneously.

[0028] In the embodiment of the present application, the inlet and outlet of the heating device 5 are equipped with a distance sensor 9 for adjusting the position of the heel end of the rail in the heating device 5. According to the embodiment of the present application, the distance sensor 9 first detects the distance between the heel end of the rail and the inlet and outlet of the heating device 5, and then compares it with the preset value, and finally selects whether to adjust the heel end position according to the comparison result, and if adjustment is required, controls the clamping mechanism 3 to make corresponding adjustments.

[0029] In the embodiment of the present application, the cooling device 4 is provided with an air jet opening facing downward, and the compressed air ejected from the air jet acts on the heel end of the cooling rail. According to the embodiment of the present application, the air jet cooling method is not only low in cost, but also can achieve cooling of the heel end at a faster speed. In the embodiment of the present application, the air jet device can also include an air box, an air duct, upper and lower guide rods, a guide sleeve, a ball screw, a guide rail and a slide 6, a bracket, a frame, a cylinder, a servo motor, etc., to achieve the extraction and compression of air, and finally eject it at a preset angle.

[0030] In an embodiment of the present application, the cooling device 4 can move back and forth along the X-axis direction to adjust the compressed air ejected from the air jet to align with the heel of the rail. According to an embodiment of the present application, the displacement of the cooling device 4 in the X-axis direction can be used to adjust the compressed air to align with the heel of the rail to ensure a better cooling effect.

[0031] In the embodiment of the present application, the cooling device 4 can return to the initial position along the Y-axis direction to cool the heel end of the next rail. According to the embodiment of the present application, the cooling device 4 moves to the unloading area along with the rail during the unloading process to continuously cool the heel end, and thereafter, the cooling device 4 returns to the initial position along the Y-axis direction to cool the heel end of the next rail to ensure that the production line does not stop.

[0032] In an embodiment of the present application, the movement of the cooling device 4 in the X-axis or Y-axis direction is driven by a driving motor. In an embodiment of the present application, a driving motor is provided in the cooling device 4 to drive it to move along a preset track to ensure timely and effective cooling of the heel end. In an embodiment of the present application, the cooling device 4 is driven by a driving motor to move along the slide 6 in the X-axis or Y-axis direction.

[0033] In the embodiment of the present application, the loading area is fixed with a loading rack 1 for supporting the rails before heat treatment. The length of the rails can be long or short, and the number of loading racks 1 fixed in the loading area can be multiple, for supporting rails of different lengths.

[0034] In the embodiment of the present application, the X-axis direction also includes a support frame 10 for supporting the rail during the heat treatment process. The support frame 10 during the heat treatment process can support the rail during the operation of the clamping mechanism 3, the heating device 5 or the cooling device 4 to ensure the smooth progress of the heat treatment. Similarly, multiple support frames 10 can be set according to the length of the rail.

[0035] In the embodiment of the present application, the unloading area is fixed with an unloading rack 8 for supporting the heat-treated rails. The unloading rack 8 fixed in the unloading area is used to support the cooled rails, and the number of the unloading racks 8 can also be set in multiples according to the length of the rails.

[0036] In some embodiments, the working process of the rail heel end heat treatment production line is as follows: first, the feeding mechanism 2 moves horizontally to one side of the upper material rack 1 and grabs a rail, and then moves in the opposite direction to the working area of ​​the clamping mechanism 3. At this time, the feeding mechanism 2 stops moving, and the clamping mechanism 3 clamps the rail along the X-axis direction to enter the specified position of the induction heating furnace to start heating. The distance between the inner wall of the induction heating furnace and the surface of the rail can be detected by the distance sensor 9 preset at the furnace mouth and automatically adjusted to the appropriate position according to the set requirements. After the heating is completed, when the heated rail exits the furnace of the induction heating furnace along the X-axis direction driven by the clamping mechanism 3, the air jet cooling device 4 located in front of the induction heating furnace mouth can start cooling according to the instruction, and when the clamping mechanism 3 exits and stops along the X-axis direction, the heated part (heel end) of the heated rail is completely placed under the air jet cooling device 4, and the clamping mechanism 3 is released at this time. At the same time, the air-cooled rail and the air jet cooling device 4 move along the slide 6 to the direction of the lower material rack 8 driven by the unloading mechanism 7 along the Y direction to the designated position and stop (the designated position here can be either the unloading area or the midway position to the unloading area, which can be set according to the actual cooling needs). During the process, the heel end of the rail is continuously cooled.

[0037] After that, the feeding mechanism 2 moves horizontally to the side of the upper material rack 1 again and grabs a rail and then moves in the opposite direction to the working area of ​​the clamping mechanism 3. At this time, the feeding mechanism 2 stops moving, and the clamping mechanism 3 clamps the rail and enters the specified position of the induction heating furnace along the X-axis direction to start heating. Before the heating is finished, the air jet cooling device 4 completes the air jet cooling of the previous rail, stops cooling and moves along the Y-axis direction along the slide 6 to the upper front position of the induction heating furnace mouth again to wait for the heated rail to finish heating and then exit the furnace for cooling. After the previous rail is unloaded, the unloading mechanism 7

[0038] The rails are returned to be ready for air jet cooling. This reciprocating cycle method can not only significantly improve the efficiency of offline heat treatment of the heel end of the rails, but also shorten the air cooling time after heating, reduce the slow diffusion of heat, increase the temperature gradient per unit distance per unit time, and reduce the width of the heat affected zone of the local heel end heat treatment, that is, efficiency and quality are achieved simultaneously.

[0039] In some embodiments, the components of the feeding mechanism 2 and the unloading mechanism 7 are the same, mainly composed of a patrol trolley, a bracket, a guide rail, a drag chain, a cylinder, a pallet, and a servo motor. The clamping mechanism 3 is mainly composed of a U-shaped frame, a central pallet, a cylinder, hydraulic clamps on both sides, a guide rail, a base, a drag chain, and a servo motor. The feeding mechanism 2 is staggered with the feeding rack 1 and the clamping mechanism 3 in the horizontal and vertical positions. The highest position of the loading and unloading mechanism 7 is lower than the guide rail plane of the loading and unloading rack 8 when the patrol trolley pallet is not raised. At the same time, when the material search trolley pallet lifts the rail, the pallet height is greater than the U-shaped frame of the clamping mechanism 3 and the driven rollers arranged in front and behind the clamping mechanism 3.

[0040] First, the steel rails to be heat treated are placed on the loading rack 1. The patrol trolley on the bracket of the loading mechanism 2 is driven by the servo motor and moves horizontally along the guide rail to the side of the upper material rack 1. When the pallet of the material-seeking trolley coincides with the bottom position of the rail of the loading rack 1, the patrol trolley stops moving. At this time, the pallet above the material-seeking trolley is driven by the cylinder to lift the rail away from the guide rail contact surface of the loading rack 1, and then the pallet stops. At this time, the material-seeking trolley is driven by the servo motor to support the first rail and move horizontally along the guide rail to the clamping mechanism 3 on the other side. When the front and rear positions of the pallet of the patrol trolley coincide with the center of the U-shaped frame of the clamping mechanism 3, the patrol trolley stops, the pallet falls back, and the rail is placed on the front and rear rollers. At this time, the central pallet of the clamping mechanism 3 is driven by the cylinder to lift and drag the bottom of the rail, and the hydraulic clamps on both sides extend toward the center to buckle the rail limbs of the rail. At the same time, the material-seeking trolley of the feeding mechanism 2 moves toward the upper material rack 1 to support the next rail.

[0041] The base below the U-shaped frame of the clamping mechanism 3 moves forward along the longitudinal guide rail under the drive of the servo motor. At this time, one end of the rail is extended into the induction heating furnace for static heating. After the heating is completed, the clamping mechanism 3 drives one end of the rail to withdraw from the furnace cavity, and the air spray cooling device 4 (mainly composed of an air box, an air duct, upper and lower guide rods, a guide sleeve, a ball screw, a guide rail and a slide 6, a bracket, a frame, a cylinder, a servo motor, etc.) arranged above one end of the rail along the length direction of the rail begins to spray compressed air to continuously cool the heel end of the heated rail. When the rail stops withdrawing from the furnace, the central tray of the clamping mechanism 3 and the hydraulic clamps on both sides are retracted, and the material-seeking trolley of the unloading mechanism 7 moves to the front and rear coaxial positions of the U-shaped frame of the clamping mechanism 3. At this time, the pallet of the patrol trolley rises to completely disengage the rail from the U-shaped frame and drives the rail to move together in the direction of the lower material rack 8. At the same time, the air spray cooling device 4 is driven by the servo motor and moves horizontally to the lower material rack 8 along the ball screw and the slide 6 together with the rail in the direction of the lower material rack 8, and stops for continuous cooling when it moves horizontally to one end of the lower material rack 8 synchronously with the rail. At this time, the feeding mechanism 2 on the other side obtains another rail at the feeding rack 1 and repeats the above steps to put the heel end of the rail into the furnace to heat. When the heating of the second rail has not yet ended and the continuous cooling of the first rail has ended, the air jet cooling device 4 is closed and driven by the servo motor to move to the upper rack along the ball screw and the slide groove 6 and stop above the furnace mouth, waiting for the second rail that has finished heating to withdraw for cooling. At this time, the first rail is placed on the unloading rack 8 by the unloading mechanism 7 patrol trolley, and the patrol trolley moves along the guide rail toward the clamping mechanism 3, ready to obtain the second rail for synchronous and continuous cooling, and then repeat the above actions.

[0042] In some embodiments, the cross section of the air box is a cap-shaped structure, and an air duct is provided at the upper end of the air box for providing compressed air. At the same time, the air box is connected to the frame through a bracket, and a ball screw that rotates laterally is installed at both ends of the frame. One end of the guide rod is connected to the ball screw and the bracket respectively, and the ball screw is installed on one side of the guide rail and the frame. The other end of the guide rod is installed on a beam with a drag chain slide rail. The slide groove 6 is opened on one side of the guide rail to play an auxiliary guiding role. When the air jet cooling mechanism needs to move laterally, the bracket together with the air jet box can move left and right along the ball screw driven by the servo motor.

[0043] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A rail heel end heat treatment production line, characterized in that: It comprises a clamping mechanism (3), a cooling device (4), and a heating device (5) which are arranged in sequence along the X-axis direction. The production line further comprises a loading mechanism (2) and a unloading mechanism (7) arranged along the Y-axis direction. The loading mechanism (2) and the unloading mechanism (7) are respectively located on both sides of the clamping mechanism (3). The loading mechanism (2) can move back and forth along the Y-axis direction to transport the rail from the loading area to the working area of ​​the clamping mechanism (3). The clamping mechanism (3) is used to control the rail from the loading area to move back and forth along the X-axis direction so that the heel end of the rail passes through the cooling device (4) and enters the heating device (5), or exits the heating device (5) and enters the cooling device (4); the unloading mechanism (7) can move back and forth along the Y-axis direction to transport the rail whose heel end enters the cooling device (4) to the unloading area. The cooling device (4) moves with the rail during the unloading process.

2. The rail heel end heat treatment production line according to claim 1, characterized in that: The inlet and outlet of the heating device (5) are equipped with distance sensors (9) for adjusting the position of the heel end of the rail in the heating device (5).

3. The rail heel end heat treatment production line according to claim 1, characterized in that: The cooling device (4) is provided with an air jet opening facing downward, and the compressed air ejected from the air jet opening acts on the heel end of the cooling rail.

4. The rail heel end heat treatment production line according to claim 3, characterized in that: The cooling device (4) can move back and forth along the X-axis direction to adjust the compressed air ejected from the air jet to be aligned with the heel end of the rail.

5. The rail heel end heat treatment production line according to claim 1, characterized in that: The cooling device (4) can return to the initial position along the Y-axis direction to cool the heel end of the next steel rail.

6. The rail heel end heat treatment production line according to claim 1, characterized in that: The movement of the cooling device (4) in the X-axis or Y-axis direction is driven by a driving motor.

7. The rail heel end heat treatment production line according to claim 6, characterized in that: The cooling device (4) is driven by a driving motor to move along the slide groove (6) in the X-axis or Y-axis direction.

8. The rail heel end heat treatment production line according to claim 1, characterized in that: The loading area is fixed with a loading rack (1) for supporting the steel rails before heat treatment.

9. The rail heel end heat treatment production line according to claim 1, characterized in that: The X-axis direction also includes a support frame (10) for supporting the rail during the heat treatment process.

10. The rail heel end heat treatment production line according to claim 1, characterized in that: The unloading area is fixed with an unloading rack (8) for supporting the heat-treated steel rails.

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