A heat treatment device for steel castings and a method of using the same

Abstract

The present invention relates to the technical field of heat treatment devices, and discloses a heat treatment device for steel castings and a method for using the same, including a quenching box, wherein a slide rail is fixedly installed obliquely in the interior of the quenching box near the middle position thereof, the top end of the slide rail is arranged through the outer surface of the quenching box, a slide groove is penetrated through the outer surface of the slide rail, a slider is slidably installed on the inner wall of the slide groove, a rotating hole is provided at the top end of the slider, a rotating shaft is rotatably installed on the inner wall of the rotating hole, a quenching disk is fixedly installed on the top end of the rotating shaft, a plurality of through holes are evenly penetrated on the upper surface of the quenching disk, and a translation mechanism is installed between the slide rail and the slide rail. The present invention makes the workpiece slide obliquely into the quenching liquid along the slide rail, so that the workpiece can be evenly cooled in different areas of the quenching liquid, thereby avoiding uneven cooling effect caused by local temperature accumulation when quenching at a fixed position, and ensuring the uniformity and effect of the quenching process.

Description

Technical Field

[0001] The present invention relates to the technical field of heat treatment devices, and in particular to a heat treatment device for steel castings and a method for using the same. Background Art

[0002] Steel castings refer to parts made of cast steel, which have similar properties to cast iron, but are stronger than cast iron. Steel castings need to be quenched during the production process. The purpose of quenching is to transform the supercooled austenite into martensite or bainite to obtain martensite or bainite structure, and then temper it at different temperatures to greatly improve the rigidity, hardness, wear resistance, fatigue strength and toughness of the steel, so as to meet the different use needs of various mechanical parts and tools. At present, in the process of quenching steel castings, calipers are generally used to transfer steel castings to the quenching pool for quenching operations. An existing automated quenching device for steel casting processing (Announcement No.: CN217103995U) has at least the following disadvantages:

[0003] The above patent controls the quenching plate of the quenching device to move up and down, so that the steel casting placed on the quenching plate moves up and down in the quenching solution in the quenching pool, thereby achieving quenching of the steel casting; since the quenching position of the workpiece in the quenching solution is relatively fixed, it is easy for the local temperature of the quenching liquid to accumulate, resulting in uneven cooling effect, affecting the uniformity and effect of the quenching process. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a steel casting heat treatment device and a method of using the same.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A heat treatment device for steel castings comprises a quenching box, wherein a slide rail is fixedly installed obliquely inside the quenching box near the middle position thereof, the top end of the slide rail passes through the outer surface of the quenching box, a slide groove is penetrated through the outer surface of the slide rail, a slider is slidably installed on the inner wall of the slide groove, a rotating hole is provided at the top end of the slider, a rotating shaft is rotatably installed on the inner wall of the rotating hole, a quenching disk is fixedly installed on the top end of the rotating shaft, a plurality of through holes are evenly penetrated on the upper surface of the quenching disk, a translation mechanism is installed between the slide rail and the slider, and a rotation mechanism is installed between the quenching disk and the slide rail.

[0007] As a further solution of the present invention, the translation mechanism includes a transmission screw rotatably installed between the inner walls at opposite ends of the slide groove, the transmission screw penetrates the outer surface of the slider and is threadedly connected thereto, and the top end of the transmission screw penetrates the end of the slide rail.

[0008] As a further solution of the present invention, the rotating mechanism includes a transmission gear rotatably mounted on the outer surface of one side of the slider, a transmission rack is fixedly mounted on the outer surface of the slide rail close to the transmission gear, the transmission rack is meshed with the transmission gear, an end face gear ring is fixedly mounted on the lower surface of the quenching plate, the end face gear ring is sleeved on the outer side of the slider, and the transmission gear is meshed with the end face gear ring.

[0009] As a further solution of the present invention, a stirring mechanism is installed on the lower surface of the quenching disk, and the stirring mechanism includes a plurality of supporting shafts evenly and fixedly installed on the lower surface of the quenching disk in a circumferential direction, and an arc-shaped rotating plate is rotatably installed on the outer surface of each of the supporting shafts, and a plurality of the arc-shaped rotating plates can form an annular encirclement structure, and a limiting component for limiting the arc-shaped rotating plate is installed on the lower surface of the quenching disk, and a closing component for closing the arc-shaped rotating plate is installed on the inner wall of the quenching box close to the top of the slide rail.

[0010] As a further solution of the present invention, the limit assembly includes an outward stop column and a closing stop column fixedly installed on the lower surface of the quenching plate, and the outward stop column and the closing stop column are both located on the inner side of the arc-shaped rotating plate, and the outward stop column and the closing stop column are respectively arranged on both sides of the support shaft.

[0011] As a further solution of the present invention, the closing assembly includes an arc-shaped support plate fixedly installed on the inner wall of the quenching box near the top of the slide rail, and the outer surface of the arc-shaped support plate is penetrated by a rectangular opening for the slide rail to pass through, and guide plates opened outward are fixedly installed at both ends of the arc-shaped support plate.

[0012] As a further solution of the present invention, a stepper motor is fixedly mounted on the top end of the slide rail, and the output end of the stepper motor is fixedly mounted to the rotation center of the transmission screw.

[0013] As a further solution of the present invention, a limiting ring is fixedly installed on the periphery of the top of the quenching plate, and support blocks are fixedly installed on the upper surfaces of the two opposite sides of the sliding block, and the support blocks are slidably installed with the upper surface of the slide rail.

[0014] A method for using a steel casting heat treatment device comprises the following steps:

[0015] S1: Place the workpiece to be quenched on the quenching plate, and drive the transmission screw to rotate forward through the stepper motor, so that the transmission screw drives the quenching plate to slide along the slide rail into the quenching box through the slider threaded with the transmission screw, so that the workpiece placed on the quenching plate can be immersed in the quenching liquid in the quenching box for quenching operation;

[0016] S2: When the slider moves downward along the slide rail, the transmission gear installed on the slider will roll on the transmission rack, so that the transmission gear can drive the quenching plate to rotate through the end face gear ring meshing with it, so that the workpiece placed on the quenching plate can be immersed in the quenching liquid in a slowly rotating state;

[0017] S3: After quenching is completed, the stepper motor drives the transmission screw to reverse, so that the slider and the quenching plate drive the workpiece to rise and float out of the quenching liquid, and the quenched workpiece is taken out.

[0018] The beneficial effects of the present invention are:

[0019] 1. By sliding the workpiece into the quenching liquid along the slide rail, the workpiece can be evenly cooled in different areas of the quenching liquid, avoiding local temperature concentration during quenching at a fixed position, resulting in uneven cooling effect, and ensuring the uniformity and effect of the quenching process;

[0020] 2. When the slider moves downward along the slide rail, the transmission gear installed on the slider will roll on the transmission rack, so that the transmission gear can drive the quenching plate to rotate through the end face gear ring meshing with it, so that the workpiece placed on the quenching plate can be immersed in the quenching liquid in a slowly rotating state, so that the entire workpiece can be evenly contacted with the quenching liquid, further improving the uniformity of the workpiece quenching process;

[0021] 3. When the quenching plate rotates in the opposite direction and floats up, the multiple arc-shaped rotating plates installed at the bottom of the quenching plate will expand outwards under the resistance of the quenching liquid to form stirring blades, and resist against the outward stop column. At this time, the quenching plate will drive the arc-shaped rotating plates to rotate when it rotates, so that the expanded arc-shaped rotating plates can stir the quenching liquid in the quenching box, so that the heat adsorbed by the quenching liquid can be quickly dissipated, and the cooling speed of the quenching liquid is accelerated for the next quenching use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of a heat treatment device for steel castings proposed by the present invention;

[0023] Figure 2 A schematic diagram of the internal structure of a heat treatment device for steel castings proposed by the present invention;

[0024] Figure 3 A schematic diagram of a slide rail structure of a steel casting heat treatment device proposed by the present invention;

[0025] Figure 4 A schematic diagram of the structure of a quenching plate of a steel casting heat treatment device proposed by the present invention;

[0026] Figure 5 A schematic diagram of the structure of a slider of a heat treatment device for steel castings proposed by the present invention;

[0027] Figure 6 A schematic diagram of the structure of an arc-shaped support plate and a guide plate of a heat treatment device for steel castings proposed by the present invention;

[0028] Figure 7 for Figure 3 A magnified view of the structure in the middle.

[0029] In the figure: 1. quenching box; 2. slide rail; 3. slide groove; 4. slider; 5. rotating shaft; 6. quenching plate; 7. transmission screw; 8. stepping motor; 9. transmission gear; 10. transmission rack; 11. rotating hole; 12. end face gear ring; 13. through hole; 14. support shaft; 15. arc-shaped rotating plate; 16. outward stop column; 17. closing stop column; 18. support block; 19. arc-shaped support plate; 20. guide plate; 21. rectangular opening; 22. limit ring. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] Refer to the attached Figure 1 -Attached Figure 7 A heat treatment device for steel castings includes a quenching box 1, wherein the quenching box 1 contains quenching liquid, and a plurality of heat dissipation fins can be welded on the outside of the quenching box 1 to accelerate the heat dissipation efficiency of the quenching liquid; a slide rail 2 is fixedly installed in an inclined manner near the middle of the quenching box 1, and the top of the slide rail 2 penetrates the outer surface of the quenching box 1, and a slide groove 3 is formed on the outer surface of the slide rail 2, and a slider 4 is slidably installed on the inner wall of the slide groove 3, and a rotating hole 11 is formed on the top of the slider 4, and a rotating shaft 5 is rotatably installed on the inner wall of the rotating hole 11, and the rotating shaft 5 is fixedly installed on the inner wall of the rotating hole 11. A quenching plate 6 is fixedly installed on the top, and a plurality of through holes 13 are evenly opened on the upper surface of the quenching plate 6. A translation mechanism is installed between the slide rail 2 and the slider 4, and a rotation mechanism is installed between the quenching plate 6 and the slide rail 2. A stepper motor 8 is fixedly installed on the top end of the slide rail 2, and the output end of the stepper motor 8 is fixedly installed with the rotation center of the transmission screw 7. A limit ring 22 is fixedly installed on the periphery of the top of the quenching plate 6, and support blocks 18 are fixedly installed on the upper surfaces of the opposite sides of the slider 4, and the support blocks 18 are slidably installed with the upper surface of the slide rail 2.

[0033] In this embodiment, the translation mechanism includes a transmission screw 7 rotatably installed between the inner walls of the opposite ends of the slide groove 3. The transmission screw 7 passes through the outer surface of the slider 4 and is threadedly connected thereto, and the top end of the transmission screw 7 passes through the end of the slide rail 2.

[0034] When in use, the workpiece to be quenched is placed on the quenching plate 6, and the transmission screw 7 is driven by the stepper motor 8 to rotate forward, so that the transmission screw 7 drives the quenching plate 6 to slide obliquely along the slide rail 2 into the quenching box 1 through the slider 4 threadedly connected to it, so that the workpiece placed on the quenching plate 6 can be immersed in the quenching liquid in the quenching box 1 for quenching operation.

[0035] In this embodiment, the rotating mechanism includes a transmission gear 9 rotatably mounted on the outer surface of one side of the slider 4, a transmission rack 10 is fixedly mounted on the outer surface of the slide rail 2 close to the transmission gear 9, the transmission rack 10 is meshed with the transmission gear 9, an end face gear ring 12 is fixedly mounted on the lower surface of the quenching plate 6, the end face gear ring 12 is sleeved on the outer side of the slider 4, and the transmission gear 9 is meshed with the end face gear ring 12.

[0036] When the slider 4 moves downward along the slide rail 2, the transmission gear 9 installed on the slider 4 will roll on the transmission rack 10, so that the transmission gear 9 can drive the quenching plate 6 to rotate through the end face gear ring 12 meshing with it, so that the workpiece placed on the quenching plate 6 can be immersed in the quenching liquid in a slowly rotating state, so that the entire workpiece can be evenly contacted with the quenching liquid, further improving the uniformity of the workpiece quenching process.

[0037] In this embodiment, a stirring mechanism is installed on the lower surface of the quenching disk 6, and the stirring mechanism includes a plurality of support shafts 14 which are evenly and fixedly installed on the lower surface of the quenching disk 6 in a circumferential direction, and an arc-shaped rotating plate 15 is rotatably installed on the outer surface of each support shaft 14, and a plurality of arc-shaped rotating plates 15 can form an annular encirclement structure, and a limiting component for limiting the arc-shaped rotating plate 15 is installed on the lower surface of the quenching disk 6, and a closing component for closing the arc-shaped rotating plate 15 is installed on the inner wall of the quenching box 1 close to the top of the slide rail 2, and the limiting component includes an outward turning stop column 16 and a closing stop column 17 which are fixedly installed on the lower surface of the quenching disk 6, and the outward turning stop column 16 and the closing stop column 17 are both arranged on the inner side of the arc-shaped rotating plate 15, and the outward turning stop column 16 and the closing stop column 17 are respectively arranged on both sides of the support shaft 14.

[0038] When the quenching plate 6 rotates forward and is immersed in the quenching liquid, the multiple arc-shaped rotating plates 15 installed at the bottom thereof will be against the closing stop column 17 under the action of the resistance of the quenching liquid and maintain the closed state. At this time, the multiple arc-shaped rotating plates 15 will not stir the quenching liquid, thereby avoiding the rapid transfer of heat absorbed by the quenching liquid, affecting the overall temperature of the quenching liquid and affecting the quenching effect on the workpiece; when the quenching plate 6 rotates reversely and floats up, the multiple arc-shaped rotating plates 15 installed at the bottom of the quenching plate 6 will be expanded outwardly to form stirring blades under the action of the resistance of the quenching liquid, and will be against the outward-turning stop column 16. At this time, the quenching plate 6 will drive the arc-shaped rotating plates 15 to rotate when rotating, so that the expanded arc-shaped rotating plates 15 can stir the quenching liquid in the quenching box 1, so that the heat absorbed by the quenching liquid can be quickly dissipated, thereby accelerating the cooling rate of the quenching liquid for the next quenching use.

[0039] In this embodiment, the closing assembly includes an arc-shaped support plate 19 fixedly mounted on the inner wall of the quenching box 1 near the top of the slide rail 2. The outer surface of the arc-shaped support plate 19 is penetrated by a rectangular opening 21 for the slide rail 2 to pass through. Guide plates 20 opened outward are fixedly mounted at both ends of the arc-shaped support plate 19.

[0040] When the quenching disk 6 drives the arc-shaped rotating plate 15 to move up to the guide plate 20, the guide plate 20 and the arc-shaped supporting plate 19 opened outward will guide the unfolded end of the arc-shaped rotating plate 15, so that the arc-shaped rotating plate 15 can be squeezed and closed to the bottom of the quenching disk 6, avoiding the arc-shaped rotating plate 15 that is unfolded outward from being stuck to the inner wall of the quenching box 1, which would cause damage to the device.

[0041] A method for using a steel casting heat treatment device comprises the following steps:

[0042] S1: Place the workpiece to be quenched on the quenching plate 6, and drive the transmission screw 7 to rotate forward through the stepping motor 8, so that the transmission screw 7 drives the quenching plate 6 to slide obliquely along the slide rail 2 into the quenching box 1 through the slider 4 threadedly connected thereto, so that the workpiece placed on the quenching plate 6 can be immersed in the quenching liquid in the quenching box 1 for quenching operation;

[0043] S2: When the slider 4 moves downward along the slide rail 2, the transmission gear 9 installed on the slider 4 will roll on the transmission rack 10, so that the transmission gear 9 can drive the quenching plate 6 to rotate through the end face gear ring 12 meshing with it, so that the workpiece placed on the quenching plate 6 can be immersed in the quenching liquid in a slowly rotating state;

[0044] S3: After quenching is completed, the stepper motor 8 drives the transmission screw 7 to reverse, so that the slider 4 and the quenching plate 6 drive the workpiece to rise and float out of the quenching liquid, and the quenched workpiece is taken out.

[0045] From the above description, it can be seen that the above-mentioned embodiment of the present invention achieves the following technical effects: when in use, the workpiece to be quenched is placed on the quenching plate 6, and the driving screw 7 is driven by the stepping motor 8 to rotate forward, so that the driving screw 7 drives the quenching plate 6 to slide obliquely along the slide rail 2 into the quenching box 1 through the slider 4 threadedly connected thereto, so that the workpiece placed on the quenching plate 6 can be immersed in the quenching liquid in the quenching box 1 for quenching operation; due to the inclined setting of the slide rail 2, the workpiece slides obliquely into the quenching liquid along the slide rail 2, so that the workpiece can be evenly cooled in different areas of the quenching liquid, avoiding local temperature accumulation during quenching at a fixed position, resulting in uneven cooling effect, thereby ensuring the uniformity and effect of the quenching process;

[0046] When the slider 4 moves downward along the slide rail 2, the transmission gear 9 installed on the slider 4 will roll on the transmission rack 10, so that the transmission gear 9 can drive the quenching plate 6 to rotate through the end face gear ring 12 meshing with it, so that the workpiece placed on the quenching plate 6 can be immersed in the quenching liquid in a slowly rotating state, so that the entire workpiece can be evenly contacted with the quenching liquid, further improving the uniformity of the workpiece quenching process;

[0047] When the quenching plate 6 rotates forward and immerses in the quenching liquid, the multiple arc-shaped rotating plates 15 installed at the bottom thereof will abut against the closing stop column 17 under the action of the quenching liquid resistance and maintain the closed state. At this time, the multiple arc-shaped rotating plates 15 will not stir the quenching liquid, thereby preventing the heat absorbed by the quenching liquid from being quickly transferred, affecting the overall temperature of the quenching liquid and affecting the quenching effect on the workpiece;

[0048] After quenching is completed, the stepper motor 8 drives the transmission screw 7 to reverse, so that the slider 4 and the quenching plate 6 drive the workpiece to rise and float out of the quenching liquid, so that the quenched workpiece can be taken; when the quenching plate 6 rotates in the opposite direction and floats up, the multiple arc-shaped rotating plates 15 installed at the bottom of the quenching plate 6 will expand outwardly under the resistance of the quenching liquid to form stirring blades, and resist against the outward-turned stop column 16. At this time, the quenching plate 6 will drive the arc-shaped rotating plate 15 to rotate when rotating, so that the expanded arc-shaped rotating plate 15 can stir the quenching liquid in the quenching box 1, so that the heat absorbed by the quenching liquid can be quickly dissipated, and the cooling speed of the quenching liquid is accelerated, so that it can be used for the next quenching.

[0049] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A heat treatment device for steel castings, comprising a quenching box (1), characterized in that: A slide rail (2) is fixedly installed in an inclined manner inside the quenching box (1) near its middle position, the top end of the slide rail (2) passes through the outer surface of the quenching box (1), a slide groove (3) is penetrated through the outer surface of the slide rail (2), a slider (4) is slidably installed on the inner wall of the slide groove (3), a rotating hole (11) is opened at the top end of the slider (4), a rotating shaft (5) is rotatably installed on the inner wall of the rotating hole (11), a quenching plate (6) is fixedly installed on the top end of the rotating shaft (5), and a plurality of through holes (13) are evenly penetrated on the upper surface of the quenching plate (6), a translation mechanism is installed between the slide rail (2) and the slider (4), and a rotation mechanism is installed between the quenching plate (6) and the slide rail (2).

2. A steel casting heat treatment device according to claim 1, characterized in that: The translation mechanism comprises a transmission screw (7) rotatably mounted between the inner walls at opposite ends of the slide groove (3); the transmission screw (7) penetrates the outer surface of the slider (4) and is threadedly connected thereto; and the top end of the transmission screw (7) penetrates the end of the slide rail (2).

3. A steel casting heat treatment device according to claim 2, characterized in that: The rotating mechanism comprises a transmission gear (9) rotatably mounted on the outer surface of one side of the slider (4); a transmission rack (10) is fixedly mounted on the outer surface of the slide rail (2) close to the transmission gear (9); the transmission rack (10) is meshed with the transmission gear (9); an end face gear ring (12) is fixedly mounted on the lower surface of the quenching plate (6); the end face gear ring (12) is sleeved on the outer side of the slider (4); and the transmission gear (9) is meshed with the end face gear ring (12).

4. A steel casting heat treatment device according to claim 1, characterized in that: The lower surface of the quenching plate (6) is provided with a stirring mechanism, the stirring mechanism comprising a plurality of supporting shafts (14) uniformly and fixedly installed on the lower surface of the quenching plate (6) in a circumferential direction, the outer surface of each supporting shaft (14) is rotatably provided with an arc-shaped rotating plate (15), and a plurality of the arc-shaped rotating plates (15) can form an annular encircling ring structure, the lower surface of the quenching plate (6) is provided with a limiting component for limiting the arc-shaped rotating plate (15), and the inner wall of the quenching box (1) close to the top of the slide rail (2) is provided with a closing component for closing the arc-shaped rotating plate (15).

5. A steel casting heat treatment device according to claim 4, characterized in that: The limit assembly comprises an outward-turning stop column (16) and a closing stop column (17) fixedly mounted on the lower surface of the quenching plate (6); the outward-turning stop column (16) and the closing stop column (17) are both arranged on the inner side of the arc-shaped rotating plate (15), and the outward-turning stop column (16) and the closing stop column (17) are respectively arranged on both sides of the support shaft (14).

6. A steel casting heat treatment device according to claim 5, characterized in that: The closing assembly comprises an arc-shaped support plate (19) fixedly mounted on the inner wall of the quenching box (1) near the top of the slide rail (2), the outer surface of the arc-shaped support plate (19) being penetrated by a rectangular opening (21) for the slide rail (2) to pass through, and guide plates (20) opened outwardly are fixedly mounted at both ends of the arc-shaped support plate (19).

7. A steel casting heat treatment device according to claim 1, characterized in that: A stepper motor (8) is fixedly mounted on the top end of the slide rail (2), and the output end of the stepper motor (8) is fixedly mounted on the rotation center of the transmission screw rod (7).

8. The heat treatment device for steel castings according to claim 1, characterized in that: A limiting ring (22) is fixedly installed on the periphery of the top of the quenching plate (6), and support blocks (18) are fixedly installed on the upper surfaces of the two opposite sides of the sliding block (4), and the support blocks (18) are slidably installed on the upper surface of the slide rail (2).

9. A method for using a heat treatment device for steel castings, characterized in that: The heat treatment device for steel castings according to any one of claims 1 to 8 comprises the following steps: S1: placing a workpiece to be quenched on a quenching plate (6), and driving a transmission screw (7) to rotate forwardly by means of a stepping motor (8), so that the transmission screw (7) drives the quenching plate (6) to slide obliquely along a slide rail (2) into a quenching box (1) through a slider (4) threadedly connected thereto, so that the workpiece placed on the quenching plate (6) can be immersed in the quenching liquid in the quenching box (1) for quenching; S2: When the slider (4) moves downward along the slide rail (2), the transmission gear (9) mounted on the slider (4) rolls on the transmission rack (10), so that the transmission gear (9) can drive the quenching plate (6) to rotate through the end face gear ring (12) meshing with the transmission gear (9), so that the workpiece placed on the quenching plate (6) can be immersed in the quenching liquid in a slowly rotating state; S3: After quenching is completed, the stepper motor (8) drives the transmission screw (7) to reverse, so that the slider (4) and the quenching plate (6) drive the workpiece to rise and float out of the quenching liquid, and the quenched workpiece is taken out.

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