Quenching device for workpieces with variable-diameter blind holes

Abstract

The application provides a workpiece quenching device with variable-diameter blind holes, and relates to the technical field of heat treatment equipment. The application discloses a workpiece quenching device with variable-diameter blind holes, and relates to the technical field of heat treatment equipment. The application discloses a workpiece quenching device with variable-diameter blind holes, and relates to the technical field of heat treatment equipment. The application discloses a workpiece quenching device with variable-diameter blind holes, and relates to the technical field of heat treatment equipment. The application discloses a workpiece quenching device with variable-diameter blind holes, and relates to the technical field of heat treatment equipment. The application discloses a workpiece quenching device with variable-diameter blind holes, and relates to the technical field of heat treatment equipment. The application discloses a workpiece quenching device with variable-diameter blind holes, and relates to the technical field of heat treatment equipment. The application discloses a workpiece quenching device with variable-diameter blind holes, and relates to the technical field of heat treatment equipment. The application discloses a workpiece quenching device with variable-diameter blind holes, and relates to the technical field of heat treatment equipment. The application discloses a workpiece quenching device with variable-diameter blind holes, and relates to the technical field of heat treatment equipment. The application discloses a workpiece quenching device with variable-diameter blind holes, and relates to the technical field of heat treatment equipment. The application discloses a workpiece quenching device with variable-diameter blind holes, and relates to the technical field of heat treatment equipment. The application discloses a workpiece quenching device with variable-diameter blind holes, and relates to the technical field of heat treatment equipment. The application discloses a workpiece quenching device with variable-diameter blind holes, and relates to the technical field of heat treatment equipment. The application discloses a workpiece quenching device with variable-diameter blind holes, and relates to the technical field of heat treatment equipment. The application discloses a workpiece quenching device with variable-diameter blind holes, and relates to the technical field of heat treatment equipment. The application discloses a workpiece quenching device with variable-diameter blind holes, and relates to the technical field of heat treatment equipment. The application discloses a workpiece quenching device with variable-diameter blind holes, and relates to the technical field of heat treatment equipment. The application discloses a workpiece quenching device with variable-diameter blind holes, and relates to the technical field of heat treatment equipment. The application discloses a workpiece quenching device with variable-diameter blind

Description

Technical Field

[0001] This application relates to the technical field of heat treatment equipment, and more particularly to a quenching device for workpieces with variable diameter blind holes. Background Technology

[0002] Quenching equipment typically utilizes a trough-shaped container filled with quenching medium. During quenching, a high-temperature workpiece is hoisted and immersed inside the trough-shaped container. The workpiece is cooled rapidly by shaking or stirring the cooling medium to remove heat from its surface.

[0003] In some existing technologies, water can be injected into the blind holes of a workpiece to cool it by placing the workpiece horizontally in a trough-shaped container. However, due to uneven water injection, it is difficult to meet the requirement of uniform metallographic structure of the inner and outer surfaces of the workpiece with variable diameter blind holes after quenching. Summary of the Invention

[0004] This application provides a quenching device for workpieces with variable diameter blind holes, which can improve or solve the problem of uneven water injection and meet the requirement of uniform metallographic structure of inner and outer surfaces of workpieces with variable diameter blind holes after quenching.

[0005] This application provides a quenching device for workpieces with variable diameter blind holes, comprising: a quenching system, wherein the quenching system includes:

[0006] Main support frame;

[0007] A rotary drive mechanism includes at least two sets of rollers for supporting a workpiece with a variable diameter blind hole. The rollers are mounted on the main support. Each set of rollers is arranged along the axial direction of the workpiece with the variable diameter blind hole. Each set of rollers includes rollers distributed on both sides of the workpiece with the variable diameter blind hole. Each set of rollers is used to drive the workpiece with the variable diameter blind hole to rotate circumferentially along its own axis.

[0008] A spray cooling mechanism includes at least one outer spray pipe and one inner spray pipe, both of which are connected to the main support. The outer spray pipe is positioned on the outside of the workpiece with the variable diameter blind hole, and the inner spray pipe extends into the interior of the workpiece. The outer and inner spray pipes are respectively connected to an external coolant source via water pipes, and are used to spray coolant onto the outer and inner surfaces of the workpiece with the variable diameter blind hole.

[0009] In the above-mentioned optional technical solution of the quenching device for a workpiece with a variable diameter blind hole, the length of the outer spray pipe is greater than the axial length of the workpiece with a variable diameter blind hole, and the outer spray pipe is provided with at least one row of outer spray nozzles evenly distributed along the axial direction of the outer spray pipe, and all the outer spray nozzles are facing the workpiece with a variable diameter blind hole.

[0010] The length of the inner spray pipe is less than the depth of the blind hole of the workpiece with the variable diameter blind hole. The inner spray pipe is provided with multiple rows of circumferentially evenly distributed inner spray nozzles. Each row of inner spray nozzles includes multiple inner spray nozzles evenly distributed along the axial direction of the inner spray pipe.

[0011] In the above-mentioned optional technical solution of a quenching device for workpieces with variable diameter blind holes, both the outer spray pipe and the inner spray pipe have open ends, and each open end is provided with a hollow external threaded pipe. The hollow external threaded pipe passes through the main support and is connected to a connecting nut, and the connecting nut abuts against the main support.

[0012] In the above-mentioned optional technical solution of a workpiece quenching device with variable diameter blind hole, the main support is provided with a spray pipe waist-shaped hole, and the hollow external threaded pipe passes through the spray pipe waist-shaped hole.

[0013] In the above-mentioned optional technical solution of the quenching device for a workpiece with a variable diameter blind hole, a stop is provided on the peripheral wall of the idler roller, and the stop abuts against the end face of the workpiece with the variable diameter blind hole.

[0014] In the above-mentioned optional technical solution of a quenching device for workpieces with variable diameter blind holes, the rotary drive mechanism further includes at least one drive motor, which is mounted on the main support and is poweredly connected to each group of idler rollers. The drive motor is used to drive the idler rollers to rotate.

[0015] In the above-mentioned optional technical solution of a quenching device for workpieces with variable diameter blind holes, the rotary drive mechanism further includes a mounting frame for mounting the idler roller. The mounting frame is set on the main support, and all the mounting frames are provided with idler roller waist-shaped holes. A mounting slider is slidably arranged in the idler roller waist-shaped holes, and the corresponding idler roller is rotatably mounted on the mounting slider.

[0016] A universal coupling for transmitting power is provided between the drive motor and the idler roller.

[0017] In the above-mentioned optional technical solution of a quenching device for workpieces with variable diameter blind holes, the extension directions of the waist-shaped holes of the rollers on adjacent mounting frames are different.

[0018] In the above-mentioned optional technical solution of a quenching device for workpieces with variable diameter blind holes, the following is also included:

[0019] A heating furnace is used to heat the workpiece with the variable diameter blind hole;

[0020] The transmission system includes:

[0021] A support bracket is used to support the workpiece with the variable diameter blind hole;

[0022] A pneumatic lifting mechanism is used to drive the support bracket to rise and fall;

[0023] A chain conveyor system is used to drive the support bracket to reciprocate laterally between the heating furnace and the quenching system.

[0024] In the above-mentioned optional technical solution of a quenching device for workpieces with variable diameter blind holes, the following is also included:

[0025] The ground rail extends parallel to the quenching system and the conveying system;

[0026] A sealing cover is slidably mounted on the ground rail. The sealing cover is used to seal the quenching system and the conveying system. An inert gas is passed through the sealing cover.

[0027] This application provides a quenching device for a workpiece with a variable diameter blind hole, including a quenching system. The quenching system includes a main support, a rotary drive mechanism, and a spray cooling mechanism. Both the rotary drive mechanism and the spray cooling mechanism are mounted on the main support. The rotary drive mechanism is used to drive the workpiece with the variable diameter blind hole to rotate circumferentially along its own axis. The spray cooling mechanism is used to spray coolant onto the outer and inner surfaces of the workpiece with the variable diameter blind hole.

[0028] When performing formal heat treatment quenching, the quenching system is first adjusted according to the shape of the workpiece with variable diameter blind hole. Each set of rollers drives the workpiece with variable diameter blind hole to rotate circumferentially along its own axis. At the same time, the outer spray pipe and the inner spray pipe spray coolant to simultaneously cool and quench the inner and outer surfaces of the workpiece with variable diameter blind hole.

[0029] This application provides a quenching device for workpieces with variable diameter blind holes, which can simultaneously and rapidly inject water evenly onto the inner and outer surfaces of the workpieces with variable diameter blind holes, thereby improving or solving the problem of uneven water injection and ensuring the uniformity of the metallographic structure inside and outside the workpieces with variable diameter blind holes. Attached Figure Description

[0030] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0031] Figure 1 A schematic diagram of a quenching device for a workpiece with a variable diameter blind hole provided in this application embodiment;

[0032] Figure 2 This application provides a schematic diagram of the conveying system in a quenching device for workpieces with variable diameter blind holes.

[0033] Figure 3This is a schematic diagram of the quenching system in a quenching device for a workpiece with a variable diameter blind hole, provided in an embodiment of this application.

[0034] Figure 4 This application provides a schematic diagram of the main support structure in a quenching device for workpieces with variable diameter blind holes.

[0035] Figure 5 This application provides a schematic diagram of the rotary drive mechanism in a quenching device for workpieces with variable diameter blind holes.

[0036] Figure 6 This is a schematic diagram of the structure of one type of idler roller in a workpiece quenching device with a variable diameter blind hole provided in an embodiment of this application;

[0037] Figure 7 This is a schematic diagram of the spray cooling mechanism in a quenching device for a workpiece with a variable diameter blind hole, provided in an embodiment of this application.

[0038] Explanation of reference numerals in the attached figures:

[0039] 100 - Heating Furnace;

[0040] 200 - Conveying system;

[0041] 210 - Support bracket;

[0042] 220 - Pneumatic lifting mechanism;

[0043] 230 - Chain conveyor system;

[0044] 300-Quenching system;

[0045] 400 - Main support frame;

[0046] 410 - Spray pipe waist-shaped hole;

[0047] 510-Idler Roller;

[0048] 511-Stop section;

[0049] 520 - Mounting bracket;

[0050] 521 - Idler roller slotted hole;

[0051] 522 - Install slider;

[0052] 530 - Drive motor;

[0053] 531 - Drive sprocket;

[0054] 532 - Drive chain;

[0055] 533 - Driven sprocket;

[0056] 534 - Tensioner sprocket;

[0057] 540 - Universal coupling;

[0058] 600 - Spray cooling mechanism;

[0059] 610 - External spray pipe;

[0060] 611 - External spray nozzle;

[0061] 620 - Internal spray pipe;

[0062] 621-Internal spray nozzle;

[0063] 630 - Hollow external threaded pipe;

[0064] 631 - Connecting nut;

[0065] 700 - Sealing Cover;

[0066] 710-Ground Rail;

[0067] 800 - Workpiece with variable diameter blind hole.

[0068] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0069] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0070] As described in the background section, quenching equipment generally utilizes a trough-shaped container filled with quenching medium. During quenching, a high-temperature workpiece is hoisted and immersed inside the trough-shaped container. The workpiece is cooled rapidly by shaking or stirring the cooling medium to remove heat from its surface.

[0071] In some existing technologies, water can be injected into the blind holes of a workpiece to cool it by placing the workpiece horizontally in a trough-shaped container. However, due to uneven water injection, it is difficult to meet the requirement of uniform metallographic structure of the inner and outer surfaces of the workpiece with variable diameter blind holes after quenching.

[0072] To address the aforementioned technical problems, this application provides a quenching device for a workpiece with a variable diameter blind hole, including a quenching system. The quenching system includes a main support, a rotary drive mechanism, and a spray cooling mechanism. Both the rotary drive mechanism and the spray cooling mechanism are mounted on the main support. The rotary drive mechanism is used to drive the workpiece with the variable diameter blind hole to rotate circumferentially, and the spray cooling mechanism is used to spray coolant onto the outer and inner surfaces of the workpiece with the variable diameter blind hole.

[0073] When the formal heat treatment quenching operation is carried out, the rotary drive mechanism drives the workpiece with the variable diameter blind hole to rotate circumferentially, while the spray cooling mechanism sprays coolant to simultaneously cool and quench the inner and outer surfaces of the workpiece with the variable diameter blind hole.

[0074] This application provides a quenching device for workpieces with variable diameter blind holes, which can simultaneously and rapidly and uniformly cool the inner and outer surfaces of the workpieces with variable diameter blind holes with water injection, improve or solve the problem of uneven water injection, and ensure the uniformity of the metallographic structure inside and outside the workpieces with variable diameter blind holes.

[0075] The technical solution of this application and how it solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The following will be combined with the appendix... Figure 1 To be continued Figure 7 The embodiments of this application will be described below. Figure 1 A schematic diagram of a quenching device for a workpiece with a variable diameter blind hole provided in this application embodiment; Figure 2 This application provides a schematic diagram of the conveying system in a quenching device for workpieces with variable diameter blind holes. Figure 3 This is a schematic diagram of the quenching system in a quenching device for a workpiece with a variable diameter blind hole, provided in an embodiment of this application. Figure 4 This application provides a schematic diagram of the main support structure in a quenching device for workpieces with variable diameter blind holes.

[0076] Figure 5 This application provides a schematic diagram of the rotary drive mechanism in a quenching device for workpieces with variable diameter blind holes. Figure 6 This is a schematic diagram of the structure of one type of idler roller in a workpiece quenching device with a variable diameter blind hole provided in an embodiment of this application; Figure 7 This is a schematic diagram of the spray cooling mechanism in a quenching device for a workpiece with a variable diameter blind hole, provided in an embodiment of this application.

[0077] Please refer to Figure 1 , Figure 2 and Figure 3This application provides a quenching device for a workpiece 800 with a variable diameter blind hole, which includes, in sequence: a heating furnace 100, a conveying system 200, a quenching system 300 and a sealing cover 700, wherein the heating furnace 100, the conveying system 200, the quenching system 300 and the sealing cover 700 are located in the same row.

[0078] The heating furnace 100 is used to heat the workpiece 800 with a variable diameter blind hole.

[0079] The conveying system 200 is used to transport the workpiece 800 with a variable diameter blind hole from the heating furnace 100 to the quenching system 300. After quenching, the quenched workpiece 800 with a variable diameter blind hole is then transported out of the quenching system 300.

[0080] The sealing cover 700 is used to seal the quenching system 300 and the conveying system 200. An inert gas is passed through the sealing cover 700. A ground rail 710 is provided parallel to the quenching system 300 and the conveying system 200. The sealing cover 700 is slidably mounted on the ground rail 710.

[0081] The quenching system 300 includes a main support 400, a rotary drive mechanism, and a spray cooling mechanism 600. Both the rotary drive mechanism and the spray cooling mechanism 600 are mounted on the main support 400. The rotary drive mechanism is used to drive the workpiece 800 with a variable diameter blind hole to rotate circumferentially along its own axis. The spray cooling mechanism 600 is used to spray coolant onto the outer and inner surfaces of the workpiece 800 with the variable diameter blind hole.

[0082] Specifically, during the formal heat treatment quenching operation, the conveyor system 200 first extends into the heating furnace 100 to transport the heated workpiece 800 with the variable diameter blind hole out and transfer it to the quenching system 300, which is adjusted according to the shape of the workpiece 800. The rotary drive mechanism drives the workpiece 800 to rotate circumferentially, while the spray cooling mechanism 600 sprays coolant to simultaneously cool and quench the inner and outer surfaces of the workpiece 800. After quenching, the conveyor system 200 then transports the quenched workpiece 800 out of the quenching system 300. This process is repeated continuously.

[0083] This quenching device for workpieces with variable diameter blind holes (800) enables simultaneous, rapid, and uniform cooling of both the inner and outer surfaces. It improves or resolves the problem of uneven cooling within the blind holes, ensuring the uniformity of the metallographic structure. Quenching in an inert gas protective environment also prevents surface oxidation of the workpiece.

[0084] Please refer to Figure 1 and Figure 2In some embodiments provided in this application, the conveying system 200 includes, by way of example, a support bracket 210, a pneumatic lifting mechanism 220, and a chain conveying system 230.

[0085] The support bracket 210 is horizontally positioned and located at the top of the conveying system 200. The support bracket 210 is used to support the workpiece 800 with a variable diameter blind hole.

[0086] The chain conveyor system 230 is located at the top of the conveyor system 200 and at the bottom of the support bracket 210. The chain conveyor system 230 is used to drive the support bracket 210 to reciprocate laterally between the heating furnace 100 and the quenching system 300.

[0087] The pneumatic lifting mechanism 220 is located at the bottom of the support bracket 210 and is used to drive the support bracket 210 to move up and down.

[0088] Specifically, during the formal heat treatment quenching operation, the chain conveyor system 230 drives the support bracket 210 into the heating furnace 100, and the pneumatic lifting mechanism 220 lifts the support bracket 210 to support the workpiece 800 with the variable diameter blind hole. The chain conveyor system 230 drives the support bracket 210, carrying the workpiece 800 with the variable diameter blind hole, out of the heating furnace 100 and into the quenching system 300. The pneumatic lifting mechanism 220 then drives the support bracket 210 to descend and leave the workpiece 800 with the variable diameter blind hole. After the blind hole workpiece 800 with a variable diameter hole completes quenching, the pneumatic lifting mechanism 220 drives the support bracket 210 to rise and support the blind hole workpiece 800. The chain conveyor system 230 drives the support bracket 210 to carry the blind hole workpiece 800 out of the quenching system 300. The operator then moves the quenched blind hole workpiece 800 to the stacking area. This completes one quenching cycle for the blind hole workpiece 800 with a variable diameter hole. This process is then repeated.

[0089] Please refer to Figure 3 and Figure 4 In some embodiments provided in this application, the rotary drive mechanism, exemplarily, includes at least two sets of rollers 510 for supporting a workpiece 800 with a variable diameter blind hole. In this embodiment, for example... Figure 3 As shown, there are two sets of rollers 510. Each set of rollers is arranged side by side along the axial direction of the workpiece 800 with the variable diameter blind hole. Each set of rollers includes one roller 510 distributed on both sides of the workpiece 800 with the variable diameter blind hole. Each set of rollers is used to drive the workpiece 800 with the variable diameter blind hole to rotate circumferentially along its own axis.

[0090] Please refer to Figure 1 and Figure 3In some embodiments provided in this application, the spray cooling mechanism 600, exemplarily speaking, includes at least one outer spray pipe 610 and one inner spray pipe 620. In this embodiment, for example... Figure 3 As shown, the spray cooling mechanism 600 includes two outer spray pipes 610 and one inner spray pipe 620. The two outer spray pipes 610 are respectively arranged on the left and right sides of the workpiece 800 with a variable diameter blind hole along the axial direction. Both the outer spray pipes 610 and the inner spray pipe 620 are detachably connected to the main support 400 and are arranged laterally. Both the outer spray pipes 610 and the inner spray pipe 620 are parallel to the axial direction of the workpiece 800 with a variable diameter blind hole. The outer spray pipes 610 are located outside the workpiece 800 with a variable diameter blind hole, and the inner spray pipe 620 extends into the interior of the workpiece 800 with a variable diameter blind hole. The outer spray pipes 610 and the inner spray pipe 620 are respectively connected to an external coolant source through water pipes. The outer spray pipes 610 and the inner spray pipe 620 are used to spray coolant onto the outer and inner surfaces of the workpiece 800 with a variable diameter blind hole.

[0091] Specifically, during heat treatment quenching, two sets of support rollers 510 jointly drive the workpiece 800 with the variable diameter blind hole to rotate circumferentially. Simultaneously, the outer spray pipe 610 and the inner spray pipe 620 spray coolant to synchronously cool and quench the inner and outer surfaces of the workpiece 800 with the variable diameter blind hole. This enables rapid and uniform cooling of both the inner and outer surfaces of the workpiece 800 with the variable diameter blind hole, improving or solving the problem of uneven cooling within the blind hole and ensuring the uniformity of the metallographic structure inside and outside the workpiece 800 with the variable diameter blind hole.

[0092] Please refer to Figure 3 and Figure 5 In some embodiments provided in this application, the rotary drive mechanism, by way of example, further includes at least one drive motor 530. In this embodiment, there are two drive motors 530, which are used to drive two sets of idler rollers 510 to rotate respectively. The drive motors 530 are fixedly connected to the bottom surface of the main support 400, and the drive motors 530 are poweredly connected to the corresponding sets of idler rollers 510.

[0093] Specifically, please refer to Figure 3 and Figure 5The output shaft of the drive motor 530 is coaxially fixedly connected to a drive sprocket 531; a mounting plate is bolted to each corresponding idler roller 510 on the main support 400, and a driven sprocket 533 is rotatably connected to each mounting plate. A tensioning plate is provided between two driven sprockets 533, and the tensioning plate is bolted to the main support 400. A tensioning sprocket 534 is rotatably connected to the tensioning plate. The drive sprocket 531, the two driven sprockets 533, and the tensioning sprocket 534 are all located in the same vertical plane, and the drive sprocket 531, the two driven sprockets 533, and the tensioning sprocket 534 are all meshed with a transmission chain 532; a universal coupling 540 is connected between the driven sprocket 533 and the corresponding idler roller 510.

[0094] Specifically, the drive motor 530 drives the drive sprocket 531 to rotate, the drive sprocket 531 drives the transmission chain 532 to rotate, the transmission chain 532 drives the driven sprocket 533 to rotate, the driven sprocket 533 drives the universal coupling 540 to move, and the universal coupling 540 drives the idler roller 510 to rotate continuously, thereby driving the workpiece 800 with the variable diameter blind hole to rotate circumferentially along its own axis; during the operation of the transmission chain 532, the tension sprocket 534 can maintain the tension of the transmission chain 532, and maintain the stable meshing of the transmission chain 532 with the drive sprocket 531 and the driven sprocket 533.

[0095] Please refer to Figure 3 and Figure 5 In some embodiments provided in this application, the rotary drive mechanism, by way of example, further includes a mounting bracket 520 for mounting the idler roller 510. The mounting bracket 520 is fixedly connected to the main support 400 by bolts. All mounting brackets 520 are provided with idler roller slot holes 521. A mounting slider 522 is slidably connected in the idler roller slot hole 521, and the corresponding idler roller 510 is rotatably connected to the mounting slider 522.

[0096] For example, please refer to Figure 3 and Figure 5 The extension directions of the roller waist-shaped holes 521 on the two sets of mounting brackets 520 are different. Specifically, the extension directions of the two roller waist-shaped holes 521 near the open end of the workpiece 800 with the variable diameter blind hole are inclined and intersecting each other, while the extension directions of the two roller waist-shaped holes 521 near the closed end of the workpiece 800 with the variable diameter blind hole are both vertical.

[0097] Specifically, the position of each roller 510 can be adjusted according to the diameter of the workpiece 800 with variable diameter blind hole to expand the application range of the quenching device. In addition, the workpiece 800 with variable diameter blind hole can be tilted appropriately towards its own blind hole opening end as needed to allow the coolant in the blind hole to be discharged more quickly.

[0098] Please refer to Figure 3 and Figure 6 In some embodiments provided in this application, exemplarily, a stop portion 511 is integrally formed on the peripheral wall of the idler roller 510 near the open end of the workpiece 800 with a variable diameter blind hole. The stop portion 511 rotatably abuts against the open side end face of the workpiece 800 with a variable diameter blind hole. Specifically, the stop portion 511 can prevent the workpiece 800 with a variable diameter blind hole from moving axially, effectively limiting the axial movement of the workpiece 800 with a variable diameter blind hole during rotation.

[0099] Please refer to Figure 3 and Figure 7 In some embodiments provided in this application, for example, the open ends of the outer spray pipe 610 and the inner spray pipe 620 are integrally formed with hollow external threaded pipes 630. The main body support 400 is provided with a spray pipe waist-shaped hole 410. The hollow external threaded pipe 630 passes through the spray pipe waist-shaped hole 410 and is connected with a connecting nut 631. The connecting nut 631 abuts against the main body support 400.

[0100] Specifically, the threaded engagement between the hollow external threaded tube 630 and the connecting nut 631 enables a detachable connection between the outer spray pipe 610 and the inner spray pipe 620 and the main support 400. By replacing the outer spray pipe 610 and inner spray pipe 620 with different lengths depending on the length of the workpiece 800 with a variable diameter blind hole, the application range of the quenching device can be expanded. The waist-shaped hole 410 in the spray pipe allows for adjustable positions of the outer spray pipe 610 and inner spray pipe 620 relative to the main support 400. The positions of the outer spray pipe 610 and inner spray pipe 620 can be adjusted according to the actual diameter of the workpiece 800 with a variable diameter blind hole, thus adapting to different workpieces 800 with variable diameter blind holes and expanding the application range of the quenching device.

[0101] Please refer to Figure 3 and Figure 7 In some embodiments provided in this application, exemplarily, the length of the outer spray pipe 610 is greater than the length of the workpiece 800 with the variable diameter blind hole. At least one row of outer spray nozzles 611 is integrally formed on the outer spray pipe 610 and uniformly distributed along the axial direction of the outer spray pipe 610. The outer spray nozzles 611 communicate with the interior of the outer spray pipe 610, and all outer spray nozzles 611 face the workpiece 800 with the variable diameter blind hole. The length of the inner spray pipe 620 is shorter than the depth of the blind hole in the workpiece 800 with the variable diameter blind hole. The inner spray pipe 620 is provided with multiple rows of circumferentially uniformly distributed inner spray nozzles 621. The inner spray nozzles 621 communicate with the interior of the inner spray pipe 620, and each row of inner spray nozzles 621 includes multiple inner spray nozzles 621 uniformly distributed along the axial direction of the inner spray pipe 620.

[0102] Specifically, by setting multiple rows of circumferentially evenly distributed inner spray nozzles 621, the inner sidewall of the workpiece 800 with variable diameter blind holes can be evenly contacted with the coolant, thereby achieving the effect of uniformly cooling the workpiece 800 with variable diameter blind holes.

[0103] Other embodiments of this application will readily conceive of by those skilled in the art upon consideration of the specification and practice of the technical solutions disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of this application are indicated by the claims.

[0104] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A quenching device for workpieces with variable diameter blind holes, characterized in that, include: The quenching system includes: Main support frame; A rotary drive mechanism includes at least two sets of rollers for supporting a workpiece with a variable diameter blind hole. The roller sets are mounted on the main support. Each set of rollers is arranged along the axial direction of the workpiece with the variable diameter blind hole. Each set of rollers includes rollers distributed on both sides of the workpiece with the variable diameter blind hole. Each set of rollers is used to drive the workpiece with the variable diameter blind hole to rotate circumferentially along its own axis. A spray cooling mechanism includes at least one outer spray pipe and one inner spray pipe, both of which are connected to the main support. The outer spray pipe is positioned on the outside of the workpiece with the variable diameter blind hole, and the inner spray pipe extends into the interior of the workpiece. The outer and inner spray pipes are respectively connected to an external coolant source via water pipes, and are used to spray coolant onto the outer and inner surfaces of the workpiece with the variable diameter blind hole. The rotary drive mechanism further includes at least one drive motor, which is mounted on the main support and is poweredly connected to each group of idler rollers. The drive motor is used to drive the idler rollers to rotate. The rotary drive mechanism also includes a mounting bracket for mounting the idler roller. The mounting bracket is disposed on the main support. All the mounting brackets are provided with idler roller slots. A mounting slider is slidably disposed in the idler roller slot, and the corresponding idler roller is rotatably disposed on the mounting slider. A universal coupling for transmitting power is provided between the drive motor and the idler roller; Also includes: A heating furnace is used to heat the workpiece with the variable diameter blind hole; The transmission system includes: A support bracket is used to support the workpiece with the variable diameter blind hole; A pneumatic lifting mechanism is used to drive the support bracket to rise and fall; A chain conveyor system is used to drive the support bracket to reciprocate laterally between the heating furnace and the quenching system.

2. The quenching device for a workpiece with a variable diameter blind hole according to claim 1, characterized in that, The length of the outer spray pipe is greater than the axial length of the workpiece with the variable diameter blind hole. The outer spray pipe is provided with at least one row of outer spray nozzles that are evenly distributed along the axial direction of the outer spray pipe. All of the outer spray nozzles are facing the workpiece with the variable diameter blind hole. The length of the inner spray pipe is less than the depth of the blind hole of the workpiece with the variable diameter blind hole. The inner spray pipe is provided with multiple rows of circumferentially evenly distributed inner spray nozzles. Each row of inner spray nozzles includes multiple inner spray nozzles evenly distributed along the axial direction of the inner spray pipe.

3. The quenching device for a workpiece with a variable diameter blind hole according to claim 2, characterized in that, Both the outer spray pipe and the inner spray pipe have open ends, and each open end is provided with a hollow external threaded pipe. The hollow external threaded pipe passes through the main support and is connected to a connecting nut, which abuts against the main support.

4. A quenching device for a workpiece with a variable diameter blind hole according to claim 3, characterized in that, The main support has a spray pipe waist-shaped hole, and the hollow external threaded pipe passes through the spray pipe waist-shaped hole.

5. A quenching device for workpieces with variable diameter blind holes according to any one of claims 1-4, characterized in that, The idler roller has a stop on its peripheral wall, and the stop abuts against the end face of the workpiece with the variable diameter blind hole.

6. A quenching device for workpieces with variable diameter blind holes according to any one of claims 1-4, characterized in that, The extension directions of the waist-shaped holes of the idler rollers on adjacent mounting frames are different.

7. A quenching device for workpieces with variable diameter blind holes according to any one of claims 1-4, characterized in that, Also includes: The ground rail extends parallel to the quenching system and the conveying system; A sealing cover is slidably mounted on the ground rail. The sealing cover is used to seal the quenching system and the conveying system. An inert gas is passed through the sealing cover.

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