A continuous high-frequency quenching device and quenching method

Abstract

The present invention relates to the technical field of heat treatment equipment, and specifically discloses a continuous high-frequency quenching device and a quenching method, comprising a heating furnace, a cooling pool, a conveyor belt, a carrier plate and a clamping grid, wherein the conveyor belt is in a U-shaped shape, and the conveyor belt sequentially forms a loading station, a heating station, a clamping station and a cooling station located on the lower conveying surface along the length direction of the conveyor belt; a plurality of carrier plates are arranged on the conveyor belt along the length direction of the conveyor belt, and a plug-in block and a release rod are arranged on the carrier plate; the clamping grid comprises an outer frame, a cross bar and a longitudinal bar installed in the outer frame and arranged equidistantly, the cross bar and the longitudinal bar are arranged crosswise to form a plurality of limit grids for extending into the tooth tip of the bucket tooth, and a tension spring is respectively arranged between two adjacent cross bars or longitudinal bars, and a locking block for compressing the tension spring and a plug-in slot cooperating with the plug-in block are arranged on the outer frame. The continuous high-frequency quenching device and the quenching method have a relatively simple structure and reduce the overall cost.

Description

Technical Field

[0001] The invention relates to the technical field of heat treatment equipment, and in particular to a continuous high-frequency quenching device and a quenching method. Background Art

[0002] Quenching is a metal heat treatment process that has a wide range of applications and plays an important role in the field of machinery. It changes the internal structure of the metal by heating it to a certain temperature and then cooling it rapidly to improve the hardness, strength and wear resistance of the material, and also improve the mechanical properties and corrosion resistance of the material. Bucket teeth are key components used for excavating and loading materials in construction machinery such as excavators and loaders. The tooth tip of the bucket tooth is the part that directly contacts the material during the excavation operation and is subject to greater wear and impact. Under some high-wear and high-impact working conditions, quenching the tooth tip alone can improve the performance and life of the bucket tooth, which is an effective process choice.

[0003] The Chinese patent application document with publication number CN117448552A discloses a heat treatment tool and method for converting rail steel into forged bucket teeth. The heat treatment tool and method for converting rail steel into forged bucket teeth can cooperate well with the suspension body by setting a material table structure to realize automatic and efficient loading of bucket teeth, especially without the need for personnel to approach, and the second loading can be carried out when the suspension body is not cooled, which can save energy well. In addition, by using a driving rod, an operating structure and a sliding boom, the position of the pin plate can be pushed close to the contour foot when the suspension body is lifted, and the bucket teeth can be locked to ensure safety during the lifting process.

[0004] However, the heat treatment tooling for the rail steel conversion forged bucket teeth in the prior art is provided with pin plates, profiling feet and pin assemblies corresponding to the bucket teeth on the suspension body, and a single bucket tooth is clamped and fixed by the mutual cooperation between the pin plates, profiling feet and pin assemblies. Such a structure is relatively complicated and requires more space, time and manpower for maintenance and adjustment, and the overall cost is relatively high. Summary of the invention

[0005] The present invention provides a continuous high-frequency quenching device and a quenching method, aiming to solve the problems of complex structure and high overall cost of heat treatment tooling and methods for converting rail steel forged bucket teeth in the related art.

[0006] A continuous high-frequency quenching device of the present invention is used for quenching bucket teeth with tapered tooth tips, including a heating furnace and a cooling pool, and also includes: a conveyor belt, the conveyor belt is in a U-shaped shape and has an upper conveying surface and a lower conveying surface, the conveyor belt is sequentially formed along the length direction of the conveyor belt with a loading station, a heating station, a clamping station located on the upper conveying surface, and a cooling station located on the lower conveying surface; a carrier plate, a plurality of the carrier plates are arranged on the conveyor belt along the length direction of the conveyor belt, each of the carrier plates supports the bucket teeth with the tooth tips facing upward and arranged in a matrix starting from the loading station, and the carrier plate is provided with a plug-in block and a release rod; a clamping grid, comprising an outer frame, transverse bars and longitudinal bars installed in the outer frame and arranged equidistantly, the transverse bars and longitudinal bars being arranged crosswise to form a plurality of limit grids for extending into the tooth tips of the bucket teeth, and a tension spring being arranged between two adjacent transverse bars or longitudinal bars to apply elastic force to the two adjacent transverse bars or longitudinal bars so that the limit grids expand outward to push the bucket teeth, a locking block for compressing the tension spring and a plug-in slot cooperating with the plug-in block are provided on the outer frame, and when the clamping grid moves down from the clamping station to be plugged in with the carrier plate, the release rod pushes the locking block to release the tension spring. The continuous high-frequency quenching device is provided with a U-shaped conveyor belt, a plurality of carrier plates arranged on the conveyor belt, and a clamping grid that is plugged into and matched with the carrier plates; the bucket teeth can be separated and arranged by a limit grid formed by the cross-arrangement of the horizontal bars and the vertical bars of the clamping grid, so that a certain distance is maintained between the bucket teeth, which is conducive to the rapid and uniform cooling of the bucket teeth during the cooling process; and the bucket teeth are driven to flip by the conveyor belt, and at the same time, the conical part of the bucket teeth is lifted by the limit grid of the clamping grid to prevent the bucket teeth from falling, so that the tooth tips of the bucket teeth enter the cooling pool downward for cooling and quenching. Multiple bucket teeth can be arranged and fixed at the same time by only one clamping grid and a carrier plate, while ensuring work efficiency, reducing the number of designed components, saving site space, and reducing manufacturing costs, assembly costs and maintenance costs.

[0007] Preferably, the horizontal bar and the vertical bar are respectively provided with a separation head, the cross section of which has a separation angle, for extending between two adjacent bucket teeth when the clamping grid moves from the clamping station to be plugged with the carrier plate, so as to facilitate the separation and arrangement of the bucket teeth.

[0008] Preferably, the inner circumference of the outer frame is provided with a longitudinal guide groove extending along the length direction of the conveyor belt and a transverse guide groove extending along the width direction of the conveyor belt, and the two ends of each cross bar are respectively movably assembled in the two relatively arranged longitudinal guide grooves, and the two ends of each longitudinal bar are respectively movably assembled in the two relatively arranged transverse guide grooves.

[0009] Preferably, the cross bar is provided with a through slot extending along the width direction of the conveyor belt, the longitudinal bar passes through the through slot and is movably assembled on the cross bar, the through slot expands up and down along the middle part of the length direction of the conveyor belt to form a spring guide slot for installing the tension spring, and the tension spring between two adjacent cross bars is installed in the longitudinal guide slot.

[0010] Preferably, a mounting groove is provided on the inner circumference of the outer frame, the locking block is installed in the mounting groove, and a first spring is provided between the locking block and the mounting groove to apply elastic force to the locking block so that the locking block pushes against the cross bar or the longitudinal bar to compress the tension spring.

[0011] Preferably, the lower part of the outer frame is provided with frame legs, the frame legs have alignment grooves extending up and down, and the upper surface of the carrier plate is fixed with alignment rods that can be inserted into the alignment grooves. The arrangement of the alignment rods and the alignment grooves is used to limit the position of the clamping grid, ensure that the position of the clamping grid on the horizontal plane is accurate, aligned with the carrier plate up and down, and ensure that the clamping grid remains stable after being assembled with the carrier plate.

[0012] Preferably, the plug block is elastically mounted on the alignment rod, the plug slot is formed on the slot wall of the alignment slot, and the plug block has an inclined surface that slopes downward from the alignment rod to the plug slot. The inclined surface is used to guide the plug block to be smoothly inserted into the plug slot.

[0013] Preferably, the release rod is arranged at the upper end of the alignment rod, and the locking block has an inclined surface which slopes downward from the inside of the outer frame to the outside of the outer frame, and is used to be pushed by the release rod.

[0014] Preferably, the plug-in block is fixedly connected to the extension rod, the conveyor belt is arranged on the frame, the conveyor belt forms a material unloading station located on the lower conveying surface between the cooling station and the loading station, and the frame is provided with a trigger rod at the material unloading station, and the trigger rod and the extension rod have inclined surfaces that can push against each other. The setting of the trigger rod and the extension rod is used to enable the clamping grid to lift the bucket teeth and convey them to the unloading station along with the carrier plate, and the trigger rod can push against the extension rod through the inclined surface opposite to the extension rod, so that the extension rod drives the plug-in block to move into the outer frame and enter the groove. At this time, the plug-in relationship between the clamping grid and the carrier plate is released, and the clamping grid can be separated from the carrier plate under the action of gravity, so as to realize automatic unloading and improve work efficiency.

[0015] The present invention also provides a continuous high-frequency quenching method, comprising the following steps: a first step, loading, arranging a plurality of bucket teeth in a matrix with their tooth tips facing upward on a carrier plate located at a loading station; a second step, heating, a conveyor belt transports the bucket teeth to a heating station, and a heating furnace heats the bucket teeth; a third step, clamping, a conveyor belt transports the heated bucket teeth to a clamping station, a clamping grid moves downward from the clamping station, so that the tooth tips of the bucket teeth extend into the limit grid, until the plug-in block extends into the plug-in slot, a release rod pushes a locking block to release a tension spring, and the tension spring applies an elastic force to a transverse bar and a longitudinal bar so that the limit grid expands outward to push the bucket teeth, so that the clamping grid cooperates with the carrier plate to arrange and fix the bucket teeth; a fourth step, cooling, a conveyor belt transports the fixed bucket teeth to a cooling station, the bucket teeth fixed on the carrier plate by the clamping grid are flipped with the movement of the conveyor belt to have their tooth tips facing downward, the limit grid lifts the conical part of the bucket teeth to prevent the bucket teeth from falling, and a cooling pool cools and quenches the tooth tips of the bucket teeth. The continuous high-frequency quenching method utilizes a U-shaped conveyor belt to transport and flip the bucket teeth, and utilizes a clamping grid to separate and arrange the heated bucket teeth, so that after the bucket teeth are flipped, the tooth tips are lifted by the limiting grid and enter the cooling pool downward for cooling and quenching. The operation is simple and fast, and a certain distance is maintained between the bucket teeth, which is beneficial to improving the quenching effect.

[0016] By adopting the above technical scheme, the beneficial effects of the present invention are as follows: the continuous high-frequency quenching device is provided with a U-shaped conveyor belt, a plurality of carrier plates arranged on the conveyor belt, and a clamping grid that is plugged and matched with the carrier plates. The bucket teeth can be separated and arranged by the limit grid formed by the cross bars and the longitudinal bars of the clamping grid, so that a certain distance is maintained between the bucket teeth, which is conducive to the rapid and uniform cooling of the bucket teeth during the cooling process; and the shape characteristics of the bucket teeth with a conical tip and a flat bottom surface are utilized, so that the staff can place the flat bottom surface of the bucket teeth on the bucket teeth when loading the materials. On the carrier plate, multiple bucket teeth are arranged roughly in a relatively tight matrix, which is convenient for the staff to place and load materials. The bucket teeth are then turned over by the conveyor belt. At the same time, the conical part of the bucket teeth is lifted by the limit grid of the clamping grid to prevent the bucket teeth from falling, so that the tooth tips face downward into the cooling pool for cooling and quenching. Multiple bucket teeth can be arranged and fixed at the same time by only one clamping grid and a carrier plate. While ensuring work efficiency, the number of designed components is reduced, site space is saved, and manufacturing costs, assembly costs and maintenance costs are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the continuous high-frequency quenching device of the present invention.

[0018] Figure 2 It is a schematic structural diagram of the clamping grid of the continuous high-frequency quenching device of the present invention when the tension spring is compressed.

[0019] Figure 3It is a schematic structural diagram of the clamping grid of the continuous high-frequency quenching device of the present invention when the tension spring is released.

[0020] Figure 4 yes Figure 3 AA section view in.

[0021] Figure 5 yes Figure 3 BB section view in.

[0022] Figure 6 yes Figure 3 CC section view in.

[0023] Figure 7 It is a structural schematic diagram of the continuous high-frequency quenching device of the present invention when the clamping grid and the carrier plate are in the unloading station.

[0024] Figure 8 yes Figure 1 Schematic diagram of the structure of the bucket teeth.

[0025] Reference numerals:

[0026] 10. Bucket teeth; 20. Conveyor belt; 210. Loading station; 220. Heating station; 230. Clamping station; 240. Cooling station; 250. Unloading station; 200. Frame; 410. Trigger rod; 30. Heating furnace; 40. Cooling pool; 50. Carrier plate; 510. Plug-in block; 520. Release rod; 530. Alignment rod; 540. Extension rod; 610. Outer frame; 611. Locking block; 612. Plug-in slot; 613. Longitudinal guide slot; 616. First spring; 617. Frame leg; 620. Cross bar; 621. Dividing head; 622. Through slot; 623. Spring guide slot; 630. Longitudinal bar; 640. Tension spring. DETAILED DESCRIPTION

[0027] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0028] like Figures 1 to 8 As shown, an embodiment of the continuous high-frequency quenching device of the present invention is used to quench a bucket tooth 10 with a tapered tooth tip and a flat bottom surface, and includes a frame 200, a conveyor belt 20, a heating furnace 30, a cooling pool 40, a carrier plate 50 and a clamping grid.

[0029] like Figure 1As shown, the conveyor belt 20 is arranged on the frame 200. The conveyor belt 20 is in a U-shape and has an upper conveying surface and a lower conveying surface. The conveyor belt 20 sequentially forms a loading station 210, a heating station 220, a clamping station 230 located on the upper conveying surface and a cooling station 240 and an unloading station 250 located on the lower conveying surface along the length direction of the conveyor belt 20.

[0030] like Figure 1 , Figure 4 and Figure 7 As shown, a plurality of carrier plates 50 are arranged on the conveyor belt 20 along the length direction of the conveyor belt 20. Each carrier plate 50 is rectangular. Four alignment rods 530 are fixed on the upper surface of each carrier plate 50. The upper surface of the carrier plate 50 between the four alignment rods 530 forms a placement area for placing the bucket teeth 10. The placement area is located at the center of the carrier plate 50. A release rod 520 is arranged at the upper end of each alignment rod 530. A groove is opened on the outer side of each alignment rod 530. The plug-in block 510 is elastically installed in the groove by a second spring. The second spring is used to apply elastic force to the plug-in block 510 so that the plug-in block 510 extends out of the groove. The plug-in block 510 is fixedly connected to the extension rod 540. Each carrier plate 50 supports the bucket teeth 10 with the tooth tips facing upward and arranged in a matrix starting from the loading station 210.

[0031] like Figure 1 As shown, the heating furnace 30 is disposed at the heating station 220 for heating the bucket tooth 10 .

[0032] like Figures 2 to 6 As shown, the clamping grid includes an outer frame 610, a cross bar 620 and a longitudinal bar 630. A longitudinal guide groove 613, a transverse guide groove and a mounting groove are provided on the inner circumference of the outer frame 610. The two longitudinal guide grooves 613 are arranged opposite to each other and extend along the length direction of the conveyor belt 20 respectively. The two transverse guide grooves are arranged opposite to each other and extend along the width direction of the conveyor belt 20 respectively. The locking block 611 is installed in the mounting groove. A first spring 616 is arranged between the locking block 611 and the mounting groove to apply elastic force to the locking block 611 so that the locking block 611 extends out of the mounting groove. The locking block 611 has an inclined surface that slopes downward from the inside of the outer frame 610 to the outside of the outer frame 610. Four frame legs 617 are provided at the lower part of the outer frame 610, and each frame leg 617 has an alignment groove extending up and down, and the alignment groove is used to insert the alignment rod 530 to limit the position of the clamping grid, ensure that the position of the clamping grid on the horizontal plane is accurate, aligned with the carrier plate 50 up and down, and ensure that the clamping grid and the carrier plate 50 remain stable after being assembled. The groove wall of the alignment groove is provided with an insertion groove 612 that cooperates with the insertion block 510, and the insertion block 510 has an inclined surface that tilts downward from the alignment rod 530 to the insertion groove 612, and the inclined surface is used to guide the insertion block 510 to be smoothly inserted into the insertion groove 612.

[0033] The two ends of the four cross bars 620 are respectively movably assembled in the two oppositely arranged longitudinal guide grooves 613, and the two ends of the four longitudinal bars 630 are respectively movably assembled in the two oppositely arranged transverse guide grooves. The four cross bars 620 are arranged at equal intervals, and the four longitudinal bars 630 are arranged at equal intervals. Each cross bar 620 is provided with a through slot 622 extending along the width direction of the conveyor belt 20, and the longitudinal bars 630 pass through the through slot 622 and are movably assembled on the cross bar 620, so that the cross bars 620 and the longitudinal bars 630 are arranged crosswise to form a plurality of limit grids for inserting the tooth tips of the bucket teeth 10.

[0034] The through groove 622 expands up and down along the middle part of the length direction of the conveyor belt 20 to form a spring guide groove 623, and a tension spring 640 located between two adjacent longitudinal rods 630 is installed in the spring guide groove 623. A tension spring 640 located between two adjacent cross bars 620 is installed in the longitudinal guide groove 613. The tension spring 640 is used to apply elastic force to two adjacent cross bars 620 or longitudinal bars 630, so that the limit grid expands outward to push the bucket teeth 10, and the bucket teeth 10 are separated and arranged, so that a certain distance is maintained between the bucket teeth 10, which is conducive to the rapid and uniform cooling of the bucket teeth 10 during the cooling process. In the initial state, the locking block 611 extends out of the installation slot to push against the horizontal rod 620 or the vertical rod 630, thereby compressing each tension spring 640; when the clamping grid moves down from the clamping station 230 to be plugged into the carrier plate 50, the release rod 520 can push against the inclined surface of the locking block 611 to allow the locking block 611 to enter the installation slot, thereby releasing the tension spring 640.

[0035] The horizontal bar 620 and the longitudinal bar 630 are respectively provided with a separation head 621, and the cross section of the separation head 621 has a separation angle, which is used to extend between two adjacent bucket teeth 10 when the clamping grid moves down from the clamping station 230 to be plugged with the carrier plate 50, so as to facilitate the separation and arrangement of the bucket teeth 10. The longitudinal bar 630 in the embodiment is provided with a plurality of matching sections that are slidably matched with the through groove 622 along the length direction of the longitudinal bar 630, and the matching sections on the longitudinal bar 630 and the separation head 621 are staggered.

[0036] like Figure 1 As shown, the cooling pool 40 is arranged at the cooling station 240 for cooling and quenching the tooth tip of the bucket tooth 10 .

[0037] like Figure 1 and Figure 7As shown, the frame body 200 is provided with a trigger rod 410 at the unloading station 250, and the trigger rod 410 and the extending rod 540 have inclined surfaces that can push against each other, so that when the clamping grid lifts the bucket tooth 10 and transports it to the unloading station 250 along with the carrier plate 50, the trigger rod 410 can push the extending rod 540 through the inclined surface opposite to the extending rod 540, so that the extending rod 540 drives the plug-in block 510 to move into the outer frame 610 and enter the groove. At this time, the plug-in relationship between the clamping grid and the carrier plate 50 is released, and the clamping grid can be separated from the carrier plate 50 under the action of gravity, causing the bucket tooth 10 to fall, thereby realizing automatic unloading and improving work efficiency.

[0038] The working process of the embodiment of the continuous high-frequency quenching device of the present invention comprises the following steps:

[0039] The first step is loading, placing the flat bottom surface of the bucket teeth 10 on the placement area on the carrier plate 50, so that the tooth tips of multiple bucket teeth 10 face upward and are roughly arranged in a relatively tight matrix, and the center position of the bucket teeth 10 matrix corresponds to the center position of the placement area.

[0040] In the second step, heating, the conveyor belt 20 conveys the bucket tooth 10 to the heating station 220 , and the heating furnace 30 heats the bucket tooth 10 .

[0041] The third step is clamping. The conveyor belt 20 conveys the heated bucket tooth 10 to the clamping station 230. The clamping grid moves down from the clamping station 230, and the center position of the clamping grid corresponds to the center position of the placement area up and down, so that the tip of the bucket tooth 10 extends into the limit grid until the plug-in block 510 extends into the plug-in slot 612. The release rod 520 pushes the locking block 611 to release the tension spring 640. The tension spring 640 applies elastic force to the cross bar 620 and the longitudinal bar 630 to expand the limit grid outward to push the bucket tooth 10. A certain distance is formed between the bucket teeth 10, and multiple bucket teeth 10 are arranged in a relatively loose matrix on the carrier plate 50.

[0042] The fourth step is cooling. The conveyor belt 20 transports the fixed bucket tooth 10 to the cooling station 240. The bucket tooth 10 fixed on the carrier plate 50 by the clamping grid is flipped with the movement of the conveyor belt 20 to the tooth tip facing downward. The limit grid lifts the conical part of the bucket tooth 10 to prevent the bucket tooth 10 from falling. The cooling pool 40 cools and quenches the tooth tip of the bucket tooth 10.

[0043] The fifth step is unloading. The conveyor belt 20 transports the cooled bucket tooth 10 to the unloading station 250. The trigger rod 410 pushes the extending rod 540 through the inclined surface opposite to the extending rod 540, so that the extending rod 540 drives the plug-in block 510 to move into the outer frame 610 and enter the groove. The plug-in relationship between the clamping grid and the carrier plate 50 is released, and the clamping grid is separated from the carrier plate 50 under the action of gravity. The bucket tooth 10 and the clamping grid fall into the collection frame.

[0044] Thus, the continuous high-frequency quenching device is provided with a U-shaped conveyor belt 20, a plurality of carrier plates 50 arranged on the conveyor belt 20, and a clamping grid that is plugged and matched with the carrier plates 50. The bucket teeth 10 can be separated and arranged by the limit grid formed by the cross bars 620 and the longitudinal bars 630 of the clamping grid, so that a certain distance is maintained between the bucket teeth 10, which is conducive to the rapid and uniform cooling of the bucket teeth 10 during the cooling process; and by utilizing the shape characteristics of the bucket teeth 10 with a conical tip and a flat bottom surface, the staff can place the flat bottom surface of the bucket teeth 10 on the carrier plate 50 when loading. The plurality of bucket teeth 10 are arranged roughly in a relatively tight matrix, which is convenient for the staff to place and load materials, and then the bucket teeth 10 are turned over by the conveyor belt 20. At the same time, the conical part of the bucket teeth 10 is lifted by the limit grid of the clamping grid to prevent the bucket teeth 10 from falling, so that the tooth tips of the bucket teeth 10 enter the cooling pool 40 downward for cooling and quenching. Multiple bucket teeth 10 can be arranged and fixed at the same time by only one clamping grid and a carrier plate 50. While ensuring work efficiency, the number of designed components is reduced, site space is saved, and manufacturing cost, assembly cost and maintenance cost are reduced.

[0045] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0046] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0047] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A continuous high-frequency quenching device for quenching bucket teeth with tapered tooth tips, comprising a heating furnace and a cooling pool, characterized in that: It also includes: a conveyor belt, which is in the shape of a U-shaped conveyor belt and has an upper conveying surface and a lower conveying surface, and the conveyor belt is sequentially formed with a loading station, a heating station, a clamping station located on the upper conveying surface and a cooling station located on the lower conveying surface along the length direction of the conveyor belt; Carrier plates, multiple carrier plates are arranged on the conveyor belt along the length direction of the conveyor belt, each carrier plate supports bucket teeth with tooth tips facing upward and arranged in a matrix starting from the loading station, and a plug-in block and a release rod are arranged on the carrier plate; The clamping grid comprises an outer frame, a transverse bar and a longitudinal bar installed in the outer frame and arranged at equal intervals, the transverse bars and the longitudinal bars are arranged crosswise to form a plurality of limit grids for extending into the tooth tips of the bucket teeth, and a tension spring is respectively arranged between two adjacent transverse bars or longitudinal bars to apply elastic force to the two adjacent transverse bars or longitudinal bars so that the limit grid expands outward to push the bucket teeth, and a locking block for compressing the tension spring and a plug-in slot matched with the plug-in block are arranged on the outer frame. When the clamping grid moves down from the clamping station to be plugged with the carrier plate, the release rod pushes the locking block to release the tension spring; an installation slot is opened on the inner peripheral side of the outer frame, and the locking block is installed in the installation slot, and a first spring is arranged between the locking block and the installation slot to apply elastic force to the locking block so that the locking block pushes against the transverse bar or the longitudinal bar to compress the tension spring; A frame leg is provided at the lower part of the outer frame, and the frame leg has an alignment groove extending up and down. An alignment rod that can be inserted into the alignment groove is fixed on the upper surface of the carrier plate; a release rod is provided at the upper end of the alignment rod, and the locking block has an inclined surface inclined downward from the inside of the outer frame to the outside of the outer frame, which is used to be pushed by the release rod.

2. A continuous high-frequency quenching device according to claim 1, characterized in that: The transverse rod and the longitudinal rod are respectively provided with a separation head, and the cross section of the separation head has a separation angle, which is used to extend between two adjacent bucket teeth when the clamping grid moves down from the clamping station to be plugged with the carrier plate.

3. A continuous high-frequency quenching device according to claim 1, characterized in that: The inner circumference of the outer frame is provided with a longitudinal guide groove extending along the length direction of the conveyor belt and a transverse guide groove extending along the width direction of the conveyor belt. The two ends of each cross bar are respectively movably assembled in the two oppositely arranged longitudinal guide grooves, and the two ends of each longitudinal bar are respectively movably assembled in the two oppositely arranged transverse guide grooves.

4. A continuous high-frequency quenching device according to claim 3, characterized in that: The cross bar is provided with a through slot extending along the width direction of the conveyor belt. The longitudinal bar passes through the through slot and is moved and assembled on the cross bar. The through slot expands up and down in the middle part along the length direction of the conveyor belt to form a spring guide slot for installing the tension spring. The tension spring between two adjacent cross bars is installed in the longitudinal guide slot.

5. A continuous high-frequency quenching device according to claim 1, characterized in that: The plug-in block (510) is elastically mounted on the alignment rod (530), the plug-in slot (612) is formed on a slot wall of the alignment slot, and the plug-in block (510) has an inclined surface that slopes downward from the alignment rod (530) toward the plug-in slot (612).

6. A continuous high-frequency quenching device according to claim 5, characterized in that: The plug-in block is fixedly connected to the extension rod, the conveyor belt is arranged on the frame, and the conveyor belt forms a unloading station located on the lower conveying surface between the cooling station and the loading station. The frame is provided with a trigger rod at the unloading station, and the trigger rod and the extension rod have inclined surfaces that can push against each other.

7. A continuous high-frequency quenching method, characterized in that: Using the continuous high-frequency quenching device described in claim 1, The method comprises the following steps: the first step is loading, arranging a plurality of bucket teeth in a matrix with their tooth tips facing upward on a carrier plate located at a loading station; the second step is heating, a conveyor belt transports the bucket teeth to a heating station, and a heating furnace heats the bucket teeth; the third step is clamping, a conveyor belt transports the heated bucket teeth to a clamping station, a clamping grid moves downward from the clamping station, and the tooth tip of the bucket teeth extends into a limit grid until the plug-in block extends into a plug-in slot, a release rod pushes a locking block to release a tension spring, and the tension spring applies elastic force to a transverse bar and a longitudinal bar to cause the limit grid to expand outward and push the bucket teeth, so that the clamping grid cooperates with the carrier plate to arrange and fix the bucket teeth; the fourth step is cooling, a conveyor belt transports the fixed bucket teeth to a cooling station, the bucket teeth fixed on the carrier plate by the clamping grid are flipped with the movement of the conveyor belt to have their tooth tips facing downward, the limit grid lifts the conical part of the bucket teeth to prevent the bucket teeth from falling, and a cooling pool cools and quenches the tooth tips of the bucket teeth.

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