A quenching system for large stepped shaft forgings
By designing a quenching system that combines a pallet and a transfer trolley, the problems of bending deformation and low efficiency in the quenching and hoisting process of large stepped shaft forgings were solved, achieving a highly efficient and stable quenching process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DAYE SPECIAL STEEL CO LTD
- Filing Date
- 2025-08-05
- Publication Date
- 2026-07-21
Smart Images
Figure CN224530963U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heat treatment equipment technology, specifically a quenching system for large stepped shaft forgings. Background Technology
[0002] Metal quenching is a key step in heat treatment. The principle is to heat the metal to above the critical temperature (such as the austenitizing temperature of steel) to transform its internal structure into uniform austenite, and then cool it rapidly to form a high-hardness martensite structure.
[0003] In existing technologies, metal workpieces, after being heated in a quenching furnace, are typically transferred to a quenching tank for cooling using a hoisting method. For example, chains or clamps are used to hold the workpiece, and an overhead crane is used for the transfer. However, for large stepped shaft forgings, due to their large size and stepped shaft shape, their strength decreases after austenitizing heating in the quenching furnace. If traditional chains or clamps are used for hoisting, bending deformation and clamping damage are likely to occur. After tempering, straightening and recovery are impossible, or the clamping depth exceeds the standard, leading to scrapping. Furthermore, existing quenching transfer systems are too inefficient, severely limiting production output. Therefore, there is an urgent need to design a quenching system specifically for large stepped shaft forgings to avoid damage during quenching and hoisting, while simultaneously improving production efficiency. Summary of the Invention
[0004] The purpose of this invention is to provide a quenching system for large stepped shaft forgings, in order to solve the problems mentioned in the background art, such as the tendency of traditional hoisting methods to cause bending deformation of large stepped shaft forgings and the low efficiency of quenching and transportation.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A quenching system for a large stepped shaft forging, comprising:
[0007] The large stepped shaft forging is placed on the pallet;
[0008] At least two sets of quenching mechanisms are arranged side by side along a first direction. Each set of quenching mechanisms includes a quenching tank and a heating furnace arranged along a second direction. In each set of quenching mechanisms, the heating furnace has a lateral opening facing the quenching tank, and an openable and closable furnace door is provided on the outside of the lateral opening. A liftable quenching machine is provided in the quenching tank so that the quenching machine can be exposed or immersed in the quenching tank.
[0009] The transfer mechanism, the number of which corresponds to the number of quenching mechanisms, includes a first ground rail and a transfer trolley in each group of transfer mechanisms. In each group of transfer mechanisms, the first ground rail is located on both sides of the quenching tank, with the first end of the first ground rail extending toward the lateral opening of the heating furnace and the second end extending away from the lateral opening of the heating furnace. The transfer trolley is movably mounted on the first ground rail, and the pallet is placed on the transfer trolley. This allows the transfer trolley to cooperate with the quenching machine to place the pallet on or remove the pallet from the quenching machine, and to cooperate with the heating furnace to place the pallet inside or remove the pallet from the heating furnace.
[0010] The loading and unloading mechanism is used in conjunction with the transfer trolley to load and unload pallets and large stepped shaft forgings. By setting up the transfer trolley and pallet, the large stepped shaft forgings are placed on the pallet, and the transfer trolley moves the pallet to realize the transfer of the large stepped shaft forgings during the heating and quenching process. There is no need to directly clamp the large stepped shaft forgings, which effectively avoids damage to the large stepped shaft forgings during hoisting.
[0011] Furthermore, the loading and unloading mechanism includes a second ground rail and a transfer trolley. The second ground rail extends along a first direction and is located near the second end of the first ground rail. The transfer trolley is movably mounted on the second ground rail and has a first track extending along a second direction. When the first track aligns with the first ground rail, the transfer trolley can reciprocate along the first track and the first ground rail. The first direction is perpendicular to the second direction. Through this configuration, the transfer trolley can be moved onto the transfer trolley, which then transfers it to a suitable area for pallet loading and unloading.
[0012] Furthermore, it also includes a third ground rail and a loading / unloading area. The loading / unloading area is used to place pallets and is arranged along a first direction with the quenching mechanism. The third ground rail extends along a second direction, with its first end near the loading / unloading area and its second end near the second ground rail. When the transfer trolley carrying the transfer carriage docks with the third ground rail, the transfer carriage can move back and forth along the first and third ground rails. Through the above configuration, the transfer trolley can deliver the transfer carriage to the third ground rail, and the transfer carriage travels along the third ground rail to the loading / unloading area for loading and unloading pallets and large stepped shaft forgings.
[0013] Furthermore, the number of the third ground rails is at least two sets to accommodate at least two transfer trolleys loading and unloading pallets simultaneously. This configuration improves work efficiency.
[0014] Furthermore, the transfer trolley includes a first traveling mechanism, through which the transfer trolley can reciprocate along a second ground track.
[0015] Furthermore, the transfer trolley includes a support arm and a support arm lifting assembly; the support arm is mounted on the transfer trolley via the support arm lifting assembly, and the support arm is used to place a pallet.
[0016] Furthermore, the transfer trolley includes a second traveling mechanism, which allows the transfer trolley to reciprocate along a first track, a first ground track, and a third ground track.
[0017] Furthermore, the distance between the quenching tank and the heating furnace is 200–400 mm. This system can shorten the distance between the quenching tank and the heating furnace, effectively reducing heat loss after the workpiece is heated.
[0018] Furthermore, the quenching tank is provided with a quenching lifting component and a second track; the second track is arranged vertically on the inner wall of the quenching tank, the quenching machine is movably arranged on the second track, and the quenching lifting component is used to drive the quenching machine to rise and fall.
[0019] Furthermore, the quenching machine includes a quenching carriage and a bracket; the quenching carriage is connected to a second track, and the bracket is located on top of the quenching carriage to support the pallet.
[0020] Furthermore, the number of quenching lifting components is two sets, distributed on both sides of the heating furnace. Each set of quenching lifting components includes a hydraulic cylinder, a reversing pulley, and a steel wire rope. A reversing pulley is installed at the corner of the quenching tank near the heating furnace. The output ends of the hydraulic cylinders are distributed along a second direction and connected to the steel wire rope. The steel wire rope passes around the reversing pulley and connects to the quenching trolley. The hydraulic cylinder outputs a pulling force along the second direction, and after the steel wire rope is reversed by the reversing pulley, it drives the quenching trolley to move vertically.
[0021] Furthermore, the first traveling mechanism includes a first motor, a first reducer, a drive shaft, and first traveling wheels; the transfer trolley is connected to the second ground rail through multiple first traveling wheels, the first motor is fixed to the bottom of the transfer trolley, the output end of the first motor is connected to the first reducer, and the first reducer is connected to one of the first traveling wheels through the drive shaft.
[0022] Furthermore, the first reducer is a dual-shaft reducer, and both output ends of the first reducer are connected to the corresponding first traveling wheels via drive shafts.
[0023] Furthermore, the second traveling mechanism includes a second motor, a first transmission gear, a second transmission gear, and a second traveling wheel; the bottom of the transfer trolley is provided with multiple second traveling wheels, the second motor is mounted on the transfer trolley, the output end of the second motor is connected to the first transmission gear, the second transmission gear is coaxially connected to one of the second traveling wheels, and the second transmission gear is meshed with the first transmission gear, so that under the drive of the second motor, the transfer trolley is driven to reciprocate along the first track and the first ground track.
[0024] Furthermore, the lifting arm assembly includes a lifting cylinder, a third track, a fixed plate, and a lifting plate; the fixed plate is disposed on a transfer trolley, and a third track distributed vertically is disposed on the side of the fixed plate near the side opening of the heating furnace; the lifting plate is connected to the third track via rollers; the lifting cylinder is used to push the lifting plate to distribute vertically; and the lifting plate is connected to the lifting arm.
[0025] Furthermore, the support arm includes multiple first support bars, which are arranged side by side and all extend along a second direction, with a first interval between adjacent first support bars.
[0026] Furthermore, a plurality of guide blocks are arranged at intervals in the lateral opening of the heating furnace along the first direction, and the guide blocks are arranged corresponding to the first interval.
[0027] Furthermore, the bracket includes multiple second support bars, all of which extend along a second direction and are arranged side by side along a first direction. There is a second interval between two adjacent second support bars, and the first interval and the second interval are staggered so that the first support bar can extend into the second interval, which facilitates the arm to pick up or place the tray.
[0028] Furthermore, it also includes a shim, which is disposed between the pallet and the small-diameter section of the large stepped shaft forging, for supporting the small-diameter section of the large stepped shaft forging.
[0029] This invention has the following advantages over the prior art:
[0030] 1. This utility model discloses a quenching system for large stepped shaft forgings, comprising a pallet, a loading and unloading mechanism, at least two sets of quenching mechanisms, and a transfer mechanism corresponding to the number of quenching mechanisms. Each quenching mechanism includes a quenching tank and a heating furnace arranged along a second direction. The transfer mechanism includes a first ground rail laid along the second direction, and a transfer trolley movably mounted on the first ground rail. The transfer trolley passes through the first ground rail and reaches the quenching tank and heating furnace respectively. During operation, the loading and unloading mechanism places the pallet carrying the large stepped shaft forging onto the transfer trolley. The transfer trolley transfers the pallet to the heating furnace for heating. After heating, it is sent to the quenching tank for quenching. After quenching, it is removed from the quenching machine and then transferred to a designated area by the loading and unloading mechanism. This system uses a transfer trolley in conjunction with a pallet to transport large stepped shaft forgings, eliminating the need for chains or clamps to be used with an overhead crane for lifting after heating. This effectively avoids bending of the workpiece during lifting or damage to the heated steel by clamps. This system is also equipped with two or more quenching mechanisms and transfer trolleys that work in conjunction with the quenching mechanisms. Two or more transfer trolleys can work simultaneously, effectively improving production efficiency.
[0031] 2. The loading and unloading mechanism of this utility model includes a second ground rail, a transfer trolley, a third ground rail, and a loading and unloading area. The loading and unloading area is used to place pallets. The second ground rail extends along a first direction. The first end of the third ground rail is close to the loading and unloading area, and its second end is close to the second ground rail. The transfer trolley can move on the second ground rail. The transfer trolley is provided with a first track for the transfer trolley to travel on, which can transfer the transfer trolley from the first ground rail to the third ground rail. During operation, the workpieces requiring quenching are placed on a pallet (which can be transported by hoisting). The transfer trolley moves along the third track to remove the pallet carrying the workpieces, returning to the main transfer trolley. The main transfer trolley then moves to the first ground track, where the transfer trolley moves along it for heating and quenching. At this point, the main transfer trolley returns to the next third ground track to transfer the next transfer trolley to the next first ground track. After the workpieces on the first ground track have completed quenching, the main transfer trolley returns the transfer trolley to the third track, and the transfer trolley places the quenched pallet in the loading / unloading area. The quenched workpieces are manually removed, and a new pallet requiring quenching is placed on it. The transfer trolley then removes this pallet and returns to the main transfer trolley to proceed to the first ground track for heating and quenching, repeating this process continuously. This system can simultaneously complete automatic loading / unloading and automatic quenching processes, effectively preventing bending deformation and clamping damage to large stepped shaft forgings, and improving the efficiency of the quenching stage. Attached Figure Description
[0032] Figure 1 This is a side view of the quenching system for the large stepped shaft forging in this embodiment of the present invention.
[0033] Figure 2This is a top view of the quenching system for the large stepped shaft forging in this embodiment of the present invention.
[0034] Figure 3 for Figure 1 Side view of the combined use of large and small transfer vehicles;
[0035] Figure 4 for Figure 1 Side view of the intermediate quenching tank;
[0036] Figure 5 for Figure 2 A schematic diagram showing the combination of the intermediate quenching tank and the quenching lifting assembly;
[0037] In the diagram: 1. Pallet; 2. Large stepped shaft forging; 3. Quenching tank; 301. Quenching machine; 302. Second track; 303. Quenching trolley; 304. Bracket; 305. Hydraulic cylinder; 306. Reversing pulley; 307. Wire rope; 4. Heating furnace; 401. Side opening; 402. Furnace door; 5. First ground track; 6. Transfer trolley; 601. Support arm; 6011. First support bar; 602. Lifting cylinder; 603. Fixed plate; 604. Lifting plate; 605. Second traveling mechanism; 7. Second ground track; 8. Transfer trolley; 801. First track; 802. First reducer; 803. Drive shaft; 804. First traveling wheel; 9. Third ground track; 10. Loading / unloading area; 11. Shim; 12. Limit block. Detailed Implementation
[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0039] It should be noted that in the description of this utility model, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.
[0040] Furthermore, it should be understood that, for ease of description, the dimensions of the various components shown in the accompanying drawings are not drawn to actual scale.
[0041] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined or described in one figure, it will not need to be further discussed and described in the description of the subsequent figures.
[0042] Example:
[0043] The workpieces mentioned in this application include, but are not limited to, large stepped shaft forgings. The quenching system for this large stepped shaft forging is not limited to large stepped shaft forgings, but can also be applied to other workpieces that need to be heated and quenched.
[0044] refer to Figure 1 and Figure 2 A quenching system for a large stepped shaft forging includes: a tray 1, a loading and unloading mechanism, at least two sets of quenching mechanisms, and a transfer mechanism corresponding to the number of quenching mechanisms. The large stepped shaft forging 2 is placed on the tray 1. The quenching mechanisms are arranged side-by-side along a first direction, and each set of quenching mechanisms includes a quenching tank 3 and a heating furnace 4 arranged along a second direction. In each set of quenching mechanisms, the heating furnace 4 has a lateral opening 401 facing the quenching tank 3, and an openable and closable furnace door 402 is provided on the outer side of the lateral opening 401. A liftable quenching machine 301 is provided inside the quenching tank 3, so that the quenching machine 301 can be exposed above or immersed in the quenching tank 3.
[0045] Each set of the transfer mechanisms includes a first ground rail 5 and a transfer trolley 6. In each set of transfer mechanisms, the first ground rail 5 is located on both sides of the quenching tank 3, with the first end of the first ground rail 5 extending towards the lateral opening 401 of the heating furnace 4, and the second end of the first ground rail 5 extending away from the lateral opening 401 of the heating furnace. The transfer trolley 6 is movably mounted on the first ground rail 5, and the pallet 1 is placed on the transfer trolley 6 so that the transfer trolley 6 and the pallet 1 cooperate to transfer the large stepped shaft forging 2. (Reference) Figure 2 The first end of the first ground rail 5 extends to both sides of the heating furnace 4. The transfer trolley 6 moves along the first ground rail 5 and can pass through the quenching tank 3 and the side opening 401 of the heating furnace. When the transfer trolley 6 approaches the quenching tank 3, the transfer trolley 6 cooperates with the quenching machine 301 to place the pallet 1 on the quenching machine 301 or remove the pallet 1 from the quenching machine 301. When the transfer trolley 6 approaches the side opening of the heating furnace 4, the transfer trolley 6 can place the pallet 1 in the heating furnace 4 or remove the pallet 1 from the heating furnace 4.
[0046] The loading and unloading mechanism is used in conjunction with the transfer trolley 6 to load and unload the pallet 1 and the large stepped shaft forging 2.
[0047] refer to Figure 1A shim 11 can also be placed on the tray 1. The shim 11 is located below the small diameter section of the large stepped shaft forging and is used to support the small diameter section of the large stepped shaft forging. The shim 11 is selected according to the actual situation. For example, when the workpiece on the tray 1 is cylindrical, there is no need to set up a shim.
[0048] During operation, the loading and unloading mechanism places the pallet 1 carrying the large stepped shaft forging 2 onto the transfer trolley 6. The transfer trolley 6 travels along the first ground rail 5, transferring the pallet 1 to the heating furnace 4 for heating. After heating, the transfer trolley removes the pallet 1 from the heating furnace 4 and sends it to the quenching tank 3. The quenching machine 301 in the quenching tank 3 rises, and the transfer trolley 6 transfers the pallet 1 to the quenching machine 301. Subsequently, the quenching machine 301, carrying the pallet 1, is immersed in the quenching tank 3. After quenching is completed, the transfer trolley 6 removes the pallet 1 from the quenching machine 301. Finally, the loading and unloading mechanism transfers the quenched pallet 1 and the large stepped shaft forging 2 to the designated area. Throughout the heating and quenching process, the large stepped shaft forging 2 remains on the pallet 1. The large stepped shaft forging 2 is transferred to the pallet 1 via a transfer trolley 6 during the heating and quenching process. The large stepped shaft forging 2 is placed directly on the pallet 1 without the need for direct clamping, effectively avoiding damage to the large stepped shaft forging during hoisting. Moreover, this embodiment sets up two or more quenching mechanisms and transfer trolleys 6 that cooperate with the quenching mechanisms, enabling at least two transfer trolleys to work simultaneously, effectively improving work efficiency.
[0049] refer to Figure 1 In this embodiment, the loading and unloading mechanism includes a second ground rail 7 and a transfer trolley 8. The second ground rail 7 extends along a first direction and is located near the second end of the first ground rail 5. The transfer trolley 8 is movably mounted on the second ground rail 7. A first track 801 extending along a second direction is provided on the transfer trolley 8. When the first track 801 connects with the first ground rail 5, the transfer trolley 6 can reciprocate along the first track 801 and the first ground rail 5. The first direction is perpendicular to the second direction. By providing the first track on the transfer trolley 8, the transfer trolley 6 can move along the first ground rail to the transfer trolley 8, and then the transfer trolley 8 can move along the second ground rail 7 to transfer the transfer trolley 6 to a suitable area for loading and unloading pallets. To enable the transfer trolley 6 to move from the first ground rail 5 to the first track 801, the height of the first ground rail 5 is higher than that of the second ground rail 7, and the first ground rail 5 can be flush with and connected to the first track 801.
[0050] Specifically, refer to Figure 2The loading and unloading mechanism also includes a third ground rail 9 and a loading and unloading area 10. The loading and unloading area 10 is used to place the pallet 1. The loading and unloading area 10 and the quenching mechanism are arranged along a first direction. The third ground rail 9 extends along a second direction. The first end of the third ground rail 9 is close to the loading and unloading area 10, and the second end of the third ground rail 9 is close to the second ground rail 7. When the transfer trolley 8 carrying the transfer trolley 6 docks with the third ground rail 9, the transfer trolley 6 can move back and forth along the first rail 801 and the third ground rail 9. In order for the transfer trolley 6 to move from the first rail 801 to the third ground rail 9, the third ground rail 9 needs to be flush with and docked with the first rail 801. With the above settings, the transfer trolley 8 can send the transfer trolley 6 to the third ground rail 9. The transfer trolley 6 travels along the third ground rail 9 to the loading and unloading area 10 to load and unload the pallet 1 and the large stepped shaft forging 2. The loading and unloading area 10 is equipped with an existing overhead crane hoisting system to hoist heavy workpieces and pallets. Lighter workpieces and pallets can be handled manually. The appendix of this embodiment Figure 2 Only one set of third ground rails 9 is shown in the image. In actual use, the number of third ground rails 9 can be two or more sets to allow two or more transfer trolleys to load and unload pallets simultaneously, thereby improving loading and unloading efficiency.
[0051] In this embodiment, each group of first ground rail 5, second ground rail 7, and third ground rail 9 includes two rails to improve operational stability.
[0052] In existing technologies, because overhead cranes are used to transfer heated workpieces, a trolley length of approximately 6 meters is required between the quenching tank and the heating furnace. The trolley needs to move out of the heating furnace, and then the overhead crane lifts the workpiece from the trolley into the quenching tank. In this embodiment, by setting a first ground rail 5, the transfer trolley 6 travels along the first ground rail 5 to the quenching tank 3 and the heating furnace 4, reducing the distance between the quenching tank 3 and the heating furnace 4 to 200-400 mm. This has the following beneficial effects:
[0053] (1) Reduce heat loss: The workpiece needs to be kept at a high temperature during quenching. The close distance between the quenching tank and the heating furnace can shorten the transportation path, reduce the heat dissipation during transportation, ensure that the temperature of the workpiece meets the quenching requirements when it enters the tank, and ensure the quenching effect (such as hardness, wear resistance, etc.).
[0054] (2) Improve production efficiency: shorten transportation time, avoid repeated heating or process delays caused by temperature drop, make the quenching process more continuous, and improve overall production efficiency.
[0055] (2) Reduce process risks: The long distance between the quenching tank and the heating furnace results in a long transfer time for the heated workpiece. If the workpiece temperature drops significantly during the transfer, it may affect the cooling effect of the quenching medium (such as oil or water), and may even lead to problems such as quenching cracking and deformation. A closer distance can reduce such risks and ensure the stability of workpiece quality.
[0056] The following describes the structure of the transfer trolley, transfer carriage, and quenching tank, but does not limit their structure. In specific implementation, other structures with the same effect can be used as substitutes.
[0057] In this embodiment, reference Figure 3 The transfer trolley 8 includes a first traveling mechanism, which allows it to reciprocate along a second ground track 7. The first traveling mechanism includes a first motor, a first reducer 802, a drive shaft 803, and first traveling wheels 804. The transfer trolley 8 is connected to the second ground track 7 via multiple first traveling wheels 804. The first motor is fixed to the bottom of the transfer trolley 8, and its output end is connected to the first reducer 802. The first reducer 802 is connected to one of the first traveling wheels 804 via the drive shaft 803. The first reducer 802 can also be a dual-shaft reducer, with both output ends connected to the corresponding first traveling wheels 804 via the drive shaft 803. The transfer trolley 8 can be a flatbed type, with a first track 801 on its upper surface and the first traveling mechanism mounted below. In another embodiment, the bottom of the transfer trolley 8 is provided with multiple sets of first traveling mechanisms. Each set of traveling mechanisms includes a first motor, a dual-shaft reducer, two drive shafts 803, and two first traveling wheels 804. The first motors in each set of traveling mechanisms work synchronously to jointly drive the transfer trolley 8 to move along the second ground rail 7. Limit blocks 12 are provided on the first rail 804 to prevent the transfer trolley 6 from falling off the first rail 804.
[0058] The transfer trolley 6 includes a support arm 601 and a support arm lifting assembly; the support arm 601 is mounted on the transfer trolley 6 via the support arm lifting assembly, and the support arm 601 is used to place the pallet 1. The transfer trolley 6 includes a second traveling mechanism, and the transfer trolley 6 can reciprocate along the first track 801, the first ground track 5, and the third ground track 9 via the second traveling mechanism.
[0059] The second traveling mechanism 605 (not shown in the figure) includes a second motor, a first transmission gear, a second transmission gear, and a second traveling wheel; the bottom of the transfer trolley is provided with multiple second traveling wheels, the second motor is mounted on the transfer trolley, the output end of the second motor is connected to the first transmission gear, the second transmission gear is coaxially connected to one of the second traveling wheels, and the second transmission gear is meshed with the first transmission gear, so that under the drive of the second motor, the transfer trolley is driven to reciprocate along the first track and the first ground track.
[0060] refer to Figure 4 and Figure 5The quenching tank 3 is equipped with a quenching lifting assembly and a second track 302. The second track 302 is vertically arranged on the inner wall of the quenching tank 3. The quenching machine 301 is movably arranged on the second track 302. The quenching lifting assembly is used to drive the quenching machine 301 to rise and fall. The quenching machine 301 includes a quenching carriage 303 and a bracket 304. The quenching carriage 303 is connected to the second track 302, and the bracket 304 is arranged on the top of the quenching carriage 303 to support the tray 1.
[0061] The quenching lifting assembly consists of two sets, distributed on both sides of the heating furnace 4. Each set includes a hydraulic cylinder 305, a reversing pulley 306, and a wire rope 307. The reversing pulley 306 is installed at the corner of the quenching tank 3 near the heating furnace 4. The output ends of the hydraulic cylinders 305 are distributed along a second direction and connected to the wire rope 307. The wire rope 307 passes around the reversing pulley 306 and connects to the quenching carriage 303. The hydraulic cylinders 305 output tension along the second direction, and the wire rope 307, after being reversed by the reversing pulley 306, drives the quenching carriage 303 to move vertically. (Reference) Figure 5 Each hydraulic cylinder 305 can correspond to two reversing fixed pulleys 306, which improves the lifting stability of the quenching carriage 303.
[0062] The lifting arm assembly includes a lifting cylinder 602, a third track, a fixing plate 603, and a lifting plate 604. The fixing plate 603 is mounted on the transfer trolley 6. A third track, distributed vertically, is located on the side of the fixing plate 603 closest to the heating furnace side opening. The lifting plate 604 is connected to the third track via rollers. The lifting cylinder 602 pushes the lifting plate 604 vertically. The lifting plate 604 connects to the support arm 601. Specifically, the support arm 601 includes multiple first support bars 6011, arranged side-by-side and extending along a second direction, with a first interval between adjacent first support bars 6011.
[0063] Multiple guide blocks are arranged at intervals along a first direction within the lateral opening of the heating furnace, with each guide block corresponding to a first interval. These guide blocks provide guidance for the first support bar of the support arm 601, facilitating its entry and exit from the heating furnace.
[0064] The bracket 304 of the quenching trolley 303 includes multiple second support bars. The multiple second support bars extend along a second direction and are arranged side by side along a first direction. There is a second interval between two adjacent second support bars. The first interval and the second interval are staggered so that the first support bar can extend into the second interval, which facilitates the support arm 601 to pick up or place the tray.
[0065] In practice:
[0066] Pallets 1 are placed in loading / unloading area 10, and workpieces requiring quenching are placed on pallets 1. Transfer trolley 6 travels along the third ground rail 9 to loading / unloading area 10. The lifting arm assembly on transfer trolley 6 lowers the lifting arm 601 via lifting cylinder 602, thus picking up pallets 1. Transfer trolley 6 then carries the pallets back along the third ground rail 9 to transfer trolley 8, following trolley 8 to the first ground rail 5. Transfer trolley 6 travels along the first ground rail 5. At this time, transfer trolley 8 returns to loading / unloading area 10 to transfer the second transfer trolley 6; the first transfer trolley... 6. First, place the tray 1 into the heating furnace 4. After heating is completed, transfer the tray 1 to the quenching trolley 303. The quenching trolley 303 moves up and down in the quenching tank 3 to quench the workpiece. After quenching, the transfer trolley 6 returns to the transfer trolley 8 along the first ground rail 5. The transfer trolley 8 takes the transfer trolley 6 back to the loading and unloading area 10. The support arm 601 on the transfer trolley 6 lowers and puts down the quenched tray 1 and workpiece. The overhead crane takes away the quenched workpiece and places another workpiece to be quenched. Then the transfer trolley 6 picks up the tray 1 to carry out the next quenching process.
[0067] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A quenching system for large stepped shaft forgings, characterized in that, include: The large stepped shaft forging is placed on the pallet; At least two sets of quenching mechanisms are arranged side by side along a first direction. Each set of quenching mechanisms includes a quenching tank and a heating furnace arranged along a second direction. In each set of quenching mechanisms, the heating furnace has a lateral opening facing the quenching tank, and an openable and closable furnace door is provided on the outside of the lateral opening. A liftable quenching machine is provided in the quenching tank so that the quenching machine can be exposed or immersed in the quenching tank. The transfer mechanism, the number of which corresponds to the number of quenching mechanisms, includes a first ground rail and a transfer trolley in each group of transfer mechanisms. In each group of transfer mechanisms, the first ground rail is located on both sides of the quenching tank, with the first end of the first ground rail extending toward the lateral opening of the heating furnace and the second end extending away from the lateral opening of the heating furnace. The transfer trolley is movably mounted on the first ground rail, and the pallet is placed on the transfer trolley. This allows the transfer trolley to cooperate with the quenching machine to place the pallet on or remove the pallet from the quenching machine, and to cooperate with the heating furnace to place the pallet inside or remove the pallet from the heating furnace. The loading and unloading mechanism is used in conjunction with the transfer trolley to load and unload pallets and large stepped shaft forgings.
2. The quenching system for large stepped shaft forgings according to claim 1, characterized in that: The loading and unloading mechanism includes a second ground rail and a transfer trolley. The second ground rail extends along a first direction and is close to the second end of the first ground rail. The transfer trolley is movably mounted on the second ground rail and is provided with a first track extending along a second direction. When the first track is connected to the first ground rail, the transfer trolley can move back and forth along the first track and the first ground rail. The first direction is perpendicular to the second direction.
3. The quenching system for large stepped shaft forgings according to claim 2, characterized in that: It also includes a third ground rail and a loading / unloading area. The loading / unloading area is used to place the pallet. The loading / unloading area and the quenching mechanism are arranged along a first direction. The third ground rail extends along a second direction. The first end of the third ground rail is close to the loading / unloading area, and the second end of the third ground rail is close to the second ground rail. When the transfer trolley carrying the transfer carriage docks with the third ground rail, the transfer carriage can move back and forth along the first rail and the third ground rail.
4. The quenching system for large stepped shaft forgings according to claim 3, characterized in that: The number of the third ground rails is at least two sets, to allow at least two transfer trolleys to load and unload pallets simultaneously.
5. The quenching system for large stepped shaft forgings according to claim 2, characterized in that: The transfer trolley includes a first traveling mechanism, which allows the transfer trolley to move back and forth along a second ground track.
6. The quenching system for large stepped shaft forgings according to claim 3, characterized in that: The transfer trolley includes a support arm and a support arm lifting assembly; the support arm is mounted on the transfer trolley via the support arm lifting assembly, and the support arm is used to place a pallet.
7. The quenching system for large stepped shaft forgings according to claim 6, characterized in that: The transfer trolley includes a second traveling mechanism, which allows the transfer trolley to move back and forth along a first track, a first ground track, and a third ground track.
8. The quenching system for large stepped shaft forgings according to claim 1, characterized in that: The distance between the quenching tank and the heating furnace is 200-400 mm.
9. The quenching system for large stepped shaft forgings according to claim 8, characterized in that: The quenching tank is equipped with a quenching lifting component and a second track; the second track is arranged vertically on the inner wall of the quenching tank, and the quenching machine is movably arranged on the second track. The quenching lifting component is used to drive the quenching machine to rise and fall.
10. The quenching system for large stepped shaft forgings according to claim 9, characterized in that: The quenching machine includes a quenching carriage and a bracket; the quenching carriage is connected to a second track, and the bracket is located on top of the quenching carriage to support the pallet.