A tooth surface quenching device for a rack

Abstract

The present invention provides a tooth surface quenching device for a rack, belonging to the field of mechanical technology. It solves the problem of poor quenching effect of the existing quenching device. The tooth surface quenching device of the rack includes a frame, a quenching head, a quenching liquid nozzle, a quenching plate with a mounting cavity, and a fixture for clamping and positioning the rack. The quenching head and the quenching liquid nozzle are fixed on the frame. The quenching head and the quenching liquid nozzle are both located above the fixture and opposite to the fixture. The quenching plate is arranged on the frame and can slide back and forth in the horizontal direction relative to the frame. The fixture is arranged in the mounting cavity of the quenching plate. The bottom surface of the fixture is a plane. The quenching plate is also provided with an adsorption member, and the adsorption member can absorb the bottom of the rack so that it is tightly attached to the bottom surface of the fixture. The adsorption member can generate an adsorption force to firmly absorb the bottom of the rack. Even if the rack is heated during the quenching process, it will not deform and warp, thereby improving the effect of tooth surface quenching and ensuring the quality of the product.

Description

Technical Field

[0001] The invention belongs to the field of mechanical technology and relates to a tooth surface quenching device for a rack. Background Art

[0002] A rack is a special gear with teeth distributed on a bar-shaped body, mainly divided into spur racks and helical racks. During the processing of the rack, it is often necessary to quench the tooth surface of the rack to transform its surface structure into martensite, thereby improving the hardness, wear resistance and fatigue strength of the tooth surface and extending its wear resistance life.

[0003] In the prior art, the tooth surface quenching of the rack is completed on a quenching machine. For example, a Chinese patent application (application number: 201310376016.8) discloses a workpiece quenching machine, including a bed; a quenching system is arranged on the bed; a motion fixture system is arranged on the bed; a water cooling system is also arranged on the bed, and a control system for automatic operation of the machine according to steps is also arranged on the bed, the control system is connected to the quenching system; the control system is connected to the motion fixture system; the control system is connected to the water cooling system. The quenching method includes the following steps: setting the workpiece on the motion fixture system; the motion fixture drives the workpiece to move to the quenching position; the control system controls the water cooling system to spray water on the middle position of the workpiece; the control system controls the high-frequency power supply to heat the quenching coil; the control system controls the water cooling system to spray water on the quenching coil to cool the quenching coil and the workpiece. In the existing quenching machine tools as mentioned above, during the quenching process of the rack, since the rack is a long strip-shaped structure, it is easy to deform after being heated during the quenching process, causing the end to warp up. Therefore, it is easy to cause the quenching effect of the tooth surface of each part of the rack to be inconsistent. At the same time, after quenching, the entire rack will be slightly deformed and bent, affecting the quality of the product.

[0004] In order to ensure the quality of the product, the conventional practice is: during the quenching process, an operator is required to hold a hammer or sledgehammer and occasionally hit the rack to press down the end of the rack that has been warped due to deformation. However, the rack is clamped on the fixture during the quenching process, so the deformation and warping are difficult to observe with the naked eye. The strength and frequency of the knocking depend entirely on the experience of the staff. It is difficult to ensure that each knock is consistent, and it also requires a lot of manpower costs. Summary of the invention

[0005] The purpose of the present invention is to solve the above problems in the prior art and to propose a tooth surface quenching device for a rack. The technical problem to be solved by the present invention is: how to improve the quenching effect and ensure the quality of the product.

[0006] The objectives of the present invention can be achieved through the following technical solutions: a tooth surface quenching device for a rack, comprising a frame, a quenching head, a quenching liquid nozzle and a fixture for clamping and positioning the rack, the quenching head and the quenching liquid nozzle are fixed on the frame, the quenching head and the quenching liquid nozzle are both located above the fixture and are opposite to the fixture, and is characterized in that the quenching device also includes a quenching plate with an installation cavity, the quenching plate is arranged on the frame and can slide back and forth in a horizontal direction relative to the frame, the fixture is arranged in the installation cavity of the quenching plate, the bottom surface of the fixture is a plane, and the quenching plate is also provided with an adsorption part and the adsorption part can absorb the bottom of the rack so that it is tightly attached to the bottom surface of the fixture.

[0007] When the quenching device is in quenching operation, the rack is clamped and positioned on the fixture, the quenching head performs quenching processing on the rack, the quenching liquid nozzle sprays quenching liquid during the quenching process to cool and improve the quenching performance, and the quenching plate slides relative to the frame along the length direction of the rack, so that each tooth surface on the rack is quenched. The quenching plate is configured to have a mounting cavity structure, so that the quenching liquid sprayed during the quenching process will not flow everywhere, and can be collected in the mounting cavity of the quenching plate, which is convenient for subsequent recovery and processing. At the same time, the present application designs the bottom surface of the fixture to be a plane, and sets an adsorption structure on the quenching plate. The adsorption can generate an adsorption force to firmly absorb the bottom of the rack so that it always keeps it close to the bottom surface of the fixture. Therefore, during the quenching process, even if the rack is heated, it will not deform and warp, which improves the effect of tooth surface quenching and ensures the quality of the product.

[0008] In the above-mentioned rack tooth surface quenching device, the adsorption member is a vacuum generator, and the bottom of the fixture is provided with a plurality of adsorption holes, which are all connected to the vacuum generator through pipes. During the quenching process, the vacuum generator generates a vacuum adsorption force, which can firmly adsorb the bottom of the rack so that it always keeps it close to the bottom surface of the fixture. Therefore, during the quenching process, even if the rack is heated, it will not deform and warp, thereby improving the effect of tooth surface quenching and ensuring the quality of the product.

[0009] In the above-mentioned tooth surface quenching device of the rack, the adsorbent is an electromagnetic suction cup, which is in the shape of a long strip and is arranged at the bottom of the fixture, and the magnetic panel of the electromagnetic suction cup is flush with the bottom surface of the fixture. The rack is clamped and positioned in the fixture and abuts against the bottom surface of the fixture and the magnetic panel of the electromagnetic suction cup. The electromagnetic suction cup generates magnetic force by energizing the internal coil, and the rack is firmly attracted through the magnetic panel, so that it always remains close to the bottom surface of the fixture. Therefore, during the quenching process, even if the rack is heated, it will not deform and warp, which improves the effect of tooth surface quenching and ensures the quality of the product.

[0010] In the above-mentioned tooth surface quenching device of the rack, the quenching plate includes a bottom plate and a plate body in a plate shape, the inner cavity of the plate body is the above-mentioned installation cavity, the clamp is arranged in the plate body, the plate body is arranged on the bottom plate, a slide rail is fixed on the frame, the bottom plate is slidably connected to the slide rail, and the frame is also provided with a driving component capable of driving the bottom plate to slide back and forth along the slide rail. Through the structure of the slide rail, the quenching plate can slide back and forth relative to the frame, so that the tooth surface of the entire rack can be quenched.

[0011] In the above-mentioned rack tooth surface quenching device, the slide rails are provided with two, and sliders are provided at the bottom of both sides of the base plate. The sliders are slidably connected to the slide rails, and both ends of the slide rails are provided with limiters for limiting the sliding stroke of the sliders. The slide rails and sliders are arranged in two groups and are respectively close to the two sides of the base plate, so that the quenching plate can smoothly slide back and forth relative to the frame, so that the tooth surface of the entire rack can be quenched, ensuring the quenching effect and product quality. The limiter limits the moving stroke to avoid sliding too far.

[0012] In the above-mentioned rack tooth surface quenching device, the disc is rectangular, the disc is located above the bottom plate, and both ends of the disc are connected to the bottom plate through a lifting assembly that can drive the disc to rise and fall. Through the setting of the lifting assembly, the height of the disc relative to the bottom plate can be adjusted, so that it can adapt to racks of various sizes, ensuring that each rack can maintain a reasonable distance from the quenching head after being clamped, thereby improving the quenching effect and ensuring the quality of the product.

[0013] In the above-mentioned tooth surface quenching device of the rack, both ends of the disk body have two groups of the above-mentioned lifting components, and the two groups of lifting components at the same end are respectively arranged close to the two sides of the disk body, and the lifting components include a mounting seat, a worm wheel, a worm and a lifting screw. The mounting seat is cylindrical and fixed on the base plate, and the worm wheel is axially limited in the mounting seat and can rotate in the mounting seat. The worm is connected to the worm wheel in a transmission manner, and one end of the lifting screw is fixed to the disk body, and the other end passes through the worm wheel and is threadedly connected to the worm wheel. When adjustment is required, rotating the worm can drive the worm wheel to rotate, and the worm wheel can drive the lifting screw to move up and down, thereby realizing the up and down adjustment of the disk body relative to the base plate, so as to adapt to racks of various sizes, and ensure that each rack can maintain a reasonable distance from the quenching head after being clamped, thereby improving the quenching effect and ensuring the quality of the product. The lifting component can also be a hydraulic cylinder and a push rod.

[0014] In the above rack tooth surface quenching device, two worms at the same end of the disc are connected as a whole by a connecting rod, and one of the worms is also provided with a rotating wheel. Through the above arrangement, the same end of the disc can be raised and lowered synchronously, thereby ensuring the consistency of the lifting and lowering.

[0015] In the above-mentioned tooth surface quenching device of the rack, the driving assembly includes a motor, a screw and a nut, the rotating shaft of the motor is connected to the screw and can drive the screw to rotate, the nut is fixed to the bottom of the base plate, and the screw is connected to the nut in a transmission manner. The motor drives the screw to rotate, thereby driving the base plate fixed with the nut to slide along the slider, so that the tooth surface of the entire rack can be quenched. The driving assembly can also be a structure of a cylinder and a push rod.

[0016] In the above-mentioned rack tooth surface quenching device, the bottom of the disc body is also provided with a drainage interface that can be connected to the mounting cavity of the disc body. The drainage interface can be connected to the liquid storage barrel through a drainage pipe, so as to realize the centralized recovery and treatment of the quenching liquid.

[0017] In the above-mentioned rack tooth surface quenching device, the quenching liquid nozzle is located on one side of the quenching head, and the frame is also provided with a smoke exhaust pipe, which is located on one side of the quenching liquid nozzle and the smoke exhaust port of the smoke exhaust pipe is opposite to the quenching liquid nozzle. The smoke exhaust pipe can centrally discharge and process the waste smoke generated during the quenching process, thereby reducing pollution.

[0018] In the above-mentioned rack tooth surface quenching device, a mounting frame is provided in the disk body, the clamp is provided on the mounting frame, the mounting frame has a baffle, and a plurality of support blocks are also provided in the disk body, and the plurality of support blocks are located on the side of the baffle away from the clamp. The mounting frame enables the clamp to maintain a certain distance from the bottom of the disk body to prevent the rack from being soaked in the quenching liquid. The support block can place the rack to be quenched, making loading more convenient. At the same time, the setting of the support block is equivalent to raising the rack placed thereon to prevent the rack from being soaked in the quenching liquid. The baffle can prevent the sparks generated during the quenching process from splashing onto the rack placed on the support block, thereby affecting the performance of the rack to be quenched, and can also prevent the generated sparks from splashing onto the staff, thereby improving safety.

[0019] Compared with the prior art, the tooth surface quenching device of the rack has the following advantages:

[0020] 1. The bottom surface of the fixture is designed to be flat, and an adsorption structure is set on the quenching plate. The adsorption structure can generate adsorption force to firmly absorb the bottom of the rack so that it always keeps it close to the bottom surface of the fixture. Therefore, during the quenching process, even if the rack is heated, it will not deform or warp, which improves the quenching effect of the tooth surface and ensures the quality of the product.

[0021] 2. The quenching plate is configured to have a mounting cavity structure so that the quenching liquid sprayed out during the quenching process will not flow everywhere, but can be collected in the mounting cavity of the quenching plate, which is convenient for subsequent recovery and treatment.

[0022] 3. The disc can be adjusted up and down relative to the bottom plate, so as to adapt to racks of various sizes and ensure that each rack can maintain a reasonable distance from the quenching head after being clamped, thereby improving the quenching effect and ensuring product quality.

[0023] 4. The smoke exhaust pipe can centrally discharge the waste smoke generated during the quenching process, reducing pollution.

[0024] 5. The support block is used to place the rack to be quenched, which is convenient for loading. The baffle can prevent sparks generated during the quenching process, thereby improving safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the tooth surface quenching device of the rack in the first embodiment after the rack is clamped.

[0026] Figure 2 It is a three-dimensional structural diagram of the tooth surface quenching device of the rack in the first embodiment.

[0027] Figure 3 It is a side view of the tooth surface quenching device of the rack in the first embodiment.

[0028] Figure 4 yes Figure 3 Cross-sectional view along the AA direction.

[0029] Figure 5 yes Figure 3 Cross-sectional view along the BB direction.

[0030] Figure 6 yes Figure 3 Cross-sectional view along CC direction.

[0031] In the figure, 1, frame; 1a, frame body 1; 1b, frame body 2; 2, quenching head; 3, quenching liquid nozzle; 4, fixture; 4a, adsorption hole; 5, quenching plate; 5a, plate body; 5a1, installation cavity; 5a2, drainage interface; 5b, bottom plate; 6, vacuum generator; 7, slide rail; 8, slider; 9, limiter; 10, lifting assembly; 10a, mounting seat; 10b, worm gear; 10c, worm; 10d, lifting screw; 11, connecting rod; 12, rotating wheel; 13, motor; 14, screw rod; 15, nut; 16, smoke exhaust pipe; 17, mounting frame; 17a, baffle; 18, support block; 19, rack. DETAILED DESCRIPTION

[0032] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0033] Embodiment 1

[0034] like Figure 1-6As shown, the tooth surface quenching device of the rack comprises a frame 1, a quenching head 2, a quenching liquid nozzle 3, a fixture 4 for clamping and positioning the rack 19, and a quenching plate 5 having a mounting cavity 5a1. The frame 1 comprises a frame body 1a and a frame body 2 1b, the frame body 1a and the frame body 2 1b are separately arranged, a liquid storage tank for storing quenching liquid is arranged on the frame body 2 1b, the quenching head 2 and the quenching liquid nozzle 3 are both fixed on the frame 1, and the quenching liquid nozzle 3 is connected to the liquid storage tank.

[0035] The quenching plate 5 includes a bottom plate 5b and a plate body 5a in a plate shape, and the plate body 5a is arranged on the bottom plate 5b. A slide rail 7 is fixed on the frame 1a, and the slide rail 7 has two. Slide blocks 8 are provided at the bottom of both sides of the bottom plate 5b, and the slide blocks 8 are slidably connected to the slide rails 7. The frame 1 is also provided with a driving component that can drive the bottom plate 5b to slide back and forth along the slide rails 7. Both ends of the slide rails 7 are provided with limiters 9 for limiting the sliding stroke of the slide blocks 8. In this embodiment, the driving component includes a motor 13, a screw rod 14 and a nut 15. The rotating shaft of the motor 13 is connected to the screw rod 14 and can drive the screw rod 14 to rotate. The nut 15 is fixed to the bottom of the bottom plate 5b. The screw rod 14 is in transmission connection with the nut 15. The motor 13 drives the screw rod 14 to rotate, thereby driving the bottom plate 5b fixed with the nut 15 to slide along the slide blocks 8. The limiter 9 is a limit rod.

[0036] Specifically, the inner cavity of the disk body 5a is the installation cavity 5a1, the clamp 4 is located in the installation cavity 5a1, the quenching head 2 and the quenching liquid nozzle 3 are both located above the clamp 4 and are opposite to the clamp 4, and the quenching disk 5 is configured to have a mounting cavity 5a1 structure, so that the quenching liquid sprayed out during the quenching process will not flow everywhere, and can be collected in the installation cavity 5a1 of the quenching disk 5, which is convenient for subsequent recovery and treatment.

[0037] A mounting frame 17 is provided in the disk body 5a, and the clamp 4 is fixed on the mounting frame 17. The mounting frame 17 allows the clamp 4 to maintain a certain distance from the bottom of the disk body 5a to prevent the rack 19 from being soaked in the quenching liquid. A baffle 17a is provided on the mounting frame 17, and a plurality of support blocks 18 are also provided in the disk body 5a. The plurality of support blocks 18 are located on the side of the baffle 17a away from the clamp 4. The support block 18 can place the rack 19 to be quenched, making the loading more convenient. At the same time, it is equivalent to raising the rack 19 placed thereon to prevent the rack 19 from being soaked in the quenching liquid. The baffle 17a can prevent the sparks generated during the quenching process from splashing onto the rack 19 placed on the support block 18, thereby affecting the performance of the rack 19 to be quenched. It can also prevent the generated sparks from splashing onto the staff, thereby improving safety.

[0038] Furthermore, the mounting frame 17 is provided with a clamp bar 1 and a clamp bar 2, wherein the clamp bar 1 is fixed on the mounting frame 17, and the clamp bar 2 is located on one side of the clamp bar 1. The mounting frame 17 is also provided with a plurality of cylinders, which are evenly distributed along the length direction of the clamp bar 2 and the top rods of the cylinders are fixed to the clamp bar 2. The plurality of cylinders can synchronously drive the clamp bar 2 to slide along the bottom surface of the mounting frame 17 toward or away from the clamp bar 1, and a clamp 4 for clamping and fixing the rack 19 is formed between the clamp bar 1 and the clamp bar 2, and the bottom surface portion of the mounting frame 17 between the clamp bar 1 and the clamp bar 2 is the bottom surface of the clamp 4.

[0039] The bottom surface of the clamp 4 is a plane, and a suction piece is also provided on the quenching plate 5, and the suction piece can suck the bottom of the rack 19 to make it close to the bottom surface of the clamp 4. In this embodiment, the suction piece is a vacuum generator 6, and a plurality of suction holes 4a are provided at the bottom of the clamp 4, and the plurality of suction holes 4a are connected to the vacuum generator 6 through pipes. The bottom surface of the clamp 4 is designed to be a plane, and during the quenching process, the vacuum generator 6 generates a vacuum suction force, which can firmly suck the bottom of the rack 19 to keep it close to the bottom surface of the clamp 4 at all times. Therefore, during the quenching process, even if the rack 19 is heated, it will not deform and warp, which improves the effect of tooth surface quenching and ensures the quality of the product.

[0040] The disk body 5a is rectangular, and the disk body 5a is located above the bottom plate 5b. Both ends of the disk body 5a are connected to the bottom plate 5b through a lifting assembly 10 that can drive the disk body 5a to rise and fall. Both ends of the disk body 5a have two sets of the above-mentioned lifting assemblies 10, and the two sets of lifting assemblies 10 at the same end are respectively arranged near the two sides of the disk body 5a. The lifting assembly 10 includes a mounting seat 10a, a worm wheel 10b, a worm 10c and a lifting screw 10d. The mounting seat 10a includes a cylindrical seat body and a cover. The seat body is fixed on the bottom plate 5b, and the cover is fixed to the seat body. The worm wheel 10b is axially limited in the mounting seat 10a and can rotate in the seat body. A notch is opened on the side of the seat body, and the outer peripheral part of the worm wheel 10b extends out of the notch. The worm 10c is arranged on one side of the seat body and is rotatably connected to the bottom plate 5b. The worm 10c is meshed with the worm wheel 10b. One end of the lifting screw 10d is fixed to the disc body 5a, and the other end passes through the base body and is threadedly connected to the center hole of the worm wheel 10b. The two worms 10c located at the same end of the disc body 5a are connected as a whole by a connecting rod 11, and a rotating wheel 12 is also provided on one of the worms 10c. By rotating the rotating wheel 12, the worm 10c can be driven to rotate, and the worm 10c can drive the worm wheel 10b to rotate, and the worm wheel 10b can drive the lifting screw 10d to move up and down, so that the disc body 5a can be adjusted up and down relative to the bottom plate 5b, so as to adapt to racks 19 of various sizes, and ensure that each rack 19 can maintain a reasonable distance from the quenching head 2 after being clamped, thereby improving the quenching effect and ensuring the quality of the product. The lifting component 10 can also be a hydraulic cylinder and a push rod.

[0041] The bottom of the plate body 5a is also provided with a drainage interface 5a2 which can be communicated with the installation cavity 5a1 of the plate body 5a. The drainage interface 5a2 can be communicated with a storage tank for recovering quenching liquid through a drainage pipe, so as to realize centralized recovery and treatment of quenching liquid.

[0042] In addition, the quenching liquid nozzle 3 is located on one side of the quenching head 2, and a smoke exhaust pipe 16 is also provided on the frame 1. The smoke exhaust pipe 16 is located on one side of the quenching liquid nozzle 3 and the smoke exhaust port of the smoke exhaust pipe 16 is opposite to the quenching liquid nozzle 3. The smoke exhaust pipe 16 can centrally discharge and process the waste smoke generated during the quenching process, thereby reducing pollution.

[0043] When the quenching device is in quenching operation, the rack 19 is clamped and positioned on the fixture 4, the quenching head 2 quenches the rack 19, the quenching liquid nozzle 3 sprays quenching liquid during the quenching process to cool and improve the quenching performance, and the quenching plate 5 slides relative to the frame 1 along the length direction of the rack 19, thereby achieving quenching treatment on each tooth surface on the rack 19.

[0044] Embodiment 2

[0045] The structure of this embodiment is basically the same as that of the first embodiment, except that the adsorption member is an electromagnetic suction cup, which is in the shape of a long strip and is arranged at the bottom of the fixture 4, and the magnetic conductive panel of the electromagnetic suction cup is flush with the bottom surface of the fixture 4. The rack 19 is clamped and positioned in the fixture 4, and is in contact with the bottom surface of the fixture 4 and the magnetic conductive panel of the electromagnetic suction cup. The electromagnetic suction cup generates magnetic force by energizing the internal coil, and the rack 19 is firmly attracted through the magnetic conductive panel, so that it always remains close to the bottom surface of the fixture 4. Therefore, during the quenching process, even if the rack 19 is heated, it will not be deformed and warped, which improves the effect of tooth surface quenching and ensures the quality of the product.

[0046] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0047] Although this article uses more terms such as 1, frame; 1a, frame body 1; 1b, frame body 2; 2, quenching head; 3, quenching liquid nozzle; 4, fixture; 4a, adsorption hole; 5, quenching plate; 5a, plate body; 5a1, installation cavity; 5a2, drainage interface; 5b, bottom plate; 6, vacuum generator; 7, slide rail; 8, slider; 9, limiter; 10, lifting assembly; 10a, mounting seat; 10b, worm gear; 10c, worm; 10d, lifting screw; 11, connecting rod; 12, rotating wheel; 13, motor; 14, screw rod; 15, nut; 16, smoke exhaust pipe; 17, mounting frame; 17a, baffle; 18, support block; 19, rack, etc., it does not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. A tooth surface quenching device for a rack, comprising a frame (1), a quenching head (2), a quenching liquid nozzle (3), and a fixture (4) for clamping and positioning a rack (19), wherein the quenching head (2) and the quenching liquid nozzle (3) are fixed on the frame (1), and the quenching head (2) and the quenching liquid nozzle (3) are both located above the fixture (4) and opposite to the fixture (4), characterized in that: The quenching device further comprises a quenching plate (5) having a mounting cavity (5a1), the quenching plate (5) being arranged on the frame (1) and being capable of sliding back and forth in a horizontal direction relative to the frame (1), the bottom surface of the clamp (4) being a plane, the quenching plate (5) being further provided with an adsorption member, and the adsorption member being capable of adsorbing the bottom of the rack (19) so that it is closely attached to the bottom surface of the clamp (4), the quenching plate (5) comprising a disc-shaped disc body (5a), the inner cavity of the disc body (5a) being the mounting cavity (5a1), the clamp (4) being arranged in the mounting cavity (5a1) of the disc body (5a), a mounting frame (17) being arranged in the disc body (5a), the clamp (4) being arranged on the mounting frame (17), and the mounting frame (17) being provided with a baffle (17a).

2. The tooth surface quenching device of the rack according to claim 1, characterized in that: The adsorption component is a vacuum generator (6), and a plurality of adsorption holes (4a) are provided at the bottom of the clamp (4), and the plurality of adsorption holes (4a) are connected to the vacuum generator (6) through pipelines.

3. The tooth surface quenching device of the rack according to claim 1, characterized in that: The adsorption component is an electromagnetic suction cup, which is in the shape of an elongated strip and is arranged at the bottom of the clamp (4), and the magnetic conductive panel of the electromagnetic suction cup is flush with the bottom surface of the clamp (4).

4. The tooth surface quenching device of a rack according to claim 1, 2 or 3, characterized in that: The quenching plate (5) further comprises a bottom plate (5b), the plate body (5a) is arranged on the bottom plate (5b), a slide rail (7) is fixed on the frame (1), the bottom plate (5b) is slidably connected to the slide rail (7), and the frame (1) is also provided with a driving component capable of driving the bottom plate (5b) to slide back and forth along the slide rail (7).

5. The rack tooth surface quenching device according to claim 4, characterized in that: The disk body (5a) is rectangular and is located above the bottom plate (5b). Both ends of the disk body (5a) are connected to the bottom plate (5b) via a lifting assembly (10) capable of driving the disk body (5a) to move up and down.

6. The tooth surface quenching device of a rack according to claim 5, characterized in that: Both ends of the disk body (5a) are provided with two groups of the above-mentioned lifting components (10), and the two groups of lifting components (10) at the same end are respectively arranged close to the two sides of the disk body (5a), the lifting components (10) comprising a mounting seat (10a), a worm wheel (10b), a worm (10c) and a lifting screw (10d), the mounting seat (10a) is cylindrical and fixed on the bottom plate (5b), the worm wheel (10b) is axially limited in the mounting seat (10a) and can rotate in the mounting seat (10a), the worm (10c) is transmission-connected to the worm wheel (10b), and one end of the lifting screw (10d) is fixed to the disk body (5a), and the other end passes through the worm wheel (10b) and is threadedly connected to the worm wheel (10b).

7. The tooth surface quenching device of a rack according to claim 6, characterized in that: Two worm gears (10c) located at the same end of the disc body (5a) are connected as a whole via a connecting rod (11), and a rotating wheel (12) is also provided on one of the worm gears (10c).

8. The rack tooth surface quenching device according to claim 7, characterized in that: The bottom of the disc body (5a) is also provided with a liquid discharge interface (5a2) capable of communicating with the installation cavity (5a1) of the disc body (5a).

9. The tooth surface quenching device of a rack according to claim 1, 2 or 3, characterized in that: The quenching liquid nozzle (3) is located on one side of the quenching head (2), and a smoke exhaust pipe (16) is also provided on the frame (1). The smoke exhaust pipe (16) is located on one side of the quenching liquid nozzle (3), and the smoke exhaust port of the smoke exhaust pipe (16) is opposite to the quenching liquid nozzle (3).

10. The rack tooth surface quenching device according to claim 5, characterized in that: A plurality of support blocks (18) are also provided in the disk body (5a), and the plurality of support blocks (18) are located on a side of the baffle (17a) away from the clamp (4).

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