Thread tooth side surface quenching device

Abstract

Disclosed is a thread tooth side surface quenching device. The device comprises: a rotation mechanism (1), a lead screw (2), a displacement adjustment mechanism (3), a base plate (4), and a drive device (5), wherein the lead screw (2) is connected to the rotation mechanism (1) and the displacement adjustment mechanism (3) separately, the displacement adjustment mechanism (3) is also connected to the base plate (4), and the base plate (4) is provided with a laser (7) and a toothed plate (41) mating with a threaded structure (6). The rotation mechanism (1) is used for holding a workpiece to be quenched, and an outer side of the workpiece to be quenched is provided with the threaded structure (6). The rotation mechanism (1) and the lead screw (2) rotate simultaneously. The rotation of the lead screw (2) drives the displacement adjustment mechanism (3) to move in a horizontal direction. The movement of the displacement adjustment mechanism (3) drives the base plate (4) to move. During a quenching process, the base plate (4) moves in the horizontal direction, and a light beam emitted by the laser (7) is used for continuously quenching a side surface of the threaded structure (6). The device improves the service life of threads of the workpiece while reducing environmental pollution caused by the quenching process.

Description

A thread tooth flank surface quenching device

[0001] This application claims priority to Chinese Patent Application No. 202411215556.2, filed on August 30, 2024, entitled "A Thread Tooth Side Surface Quenching Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to surface treatment technology for metallic materials, specifically to a device for quenching the surface of threaded tooth flanks. Background Technology

[0003] Threaded connections are a common method of assembling multiple individual workpieces of a certain length in series to form a workpiece string hundreds or even thousands of meters long. Threaded connection technology is widely used in the exploration and development of resources such as oil and natural gas. For example, multiple individual drill pipes are connected by threads to form a drill string, which continuously feeds a drill bit used to break rocks into deeper formations to achieve drilling. Because these workpieces require multiple threading and unthreading operations, i.e., connection and disassembly, the threads will wear down, reducing their thickness and eventually leading to thread failure.

[0004] Current technology involves comprehensive phosphating or copper plating of the threads on drill bit structures (such as the drill pipe mentioned above). This involves immersing the entire threaded area in a phosphating bath or electroplating solution, where a wear-resistant phosphating layer or copper is formed on the thread surface through a chemical reaction. However, the wastewater from phosphating or copper plating contains large amounts of harmful substances, including heavy metals such as chromium, nickel, zinc, and copper. Direct discharge of this wastewater pollutes water bodies, soil, and air, causing long-term harm to the environment and organisms. The wastewater also contains organic matter, acids, and alkalis, affecting water quality, reducing soil fertility, and even impacting human health. Therefore, treatment of the phosphating or copper plating wastewater is necessary. Threads lacking phosphating or copper plating protection not only have a significantly reduced service life but are also prone to seizing during use.

[0005] Therefore, how to perform surface treatment of drill pipe threads in a more environmentally friendly and efficient manner, and improve the service life and safety of drill pipe threads, has become an urgent problem that the petroleum industry needs to solve. Summary of the Invention

[0006] This application provides a threaded tooth flank surface quenching device, which quenches the surface of the threaded structure of a workpiece to form a wear-resistant layer with a certain thickness and hardness. On the one hand, it can improve the service life of the threaded structure of the workpiece, and on the other hand, it can reduce the environmental pollution caused by the quenching process.

[0007] This application provides a threaded tooth flank surface quenching device, comprising: a rotating mechanism, a lead screw, a displacement adjusting mechanism, a base plate, and a driving device. The lead screw is connected to the rotating mechanism and the displacement adjusting mechanism respectively. The displacement adjusting mechanism is also connected to the base plate. The base plate is provided with a laser and a tooth plate that matches the threaded structure.

[0008] The rotating mechanism is used to hold the workpiece to be quenched, and the workpiece to be quenched has a threaded structure on its outer side.

[0009] The driving device is used to drive the rotating mechanism to rotate, the rotation of the rotating mechanism drives the lead screw to rotate, the rotation of the lead screw drives the displacement adjustment mechanism to move in the opposite direction in the horizontal direction, and the displacement adjustment mechanism drives the substrate to move in the horizontal direction;

[0010] As the substrate moves along the horizontal direction, the laser beam emitted by the laser is used to continuously quench the side surface of the threaded structure.

[0011] In one optional embodiment, the laser emits two beams of light simultaneously, the centers of which are located on the median diameter of two adjacent side surfaces of the threaded teeth on the threaded structure, and the included angle between the centerlines of the two beams of light is the same as the included angle between the two adjacent side surfaces of the threaded teeth.

[0012] In one optional embodiment, the two beams emitted by the laser of the quenching device include a first beam and a second beam. The beams are elongated beams. The length of the first beam is less than or equal to the length of the side surface of the threaded tooth corresponding to the first beam. The length of the second beam is less than or equal to the length of the side surface of the threaded tooth corresponding to the second beam.

[0013] In one optional embodiment, the rotating mechanism includes a first gear, a second gear, and a third gear, wherein the first gear meshes with the second gear and the third gear respectively; the workpiece to be quenched is mounted on the shaft of the second gear, and the lead screw is mounted on the third gear.

[0014] The driving device is used to drive the first gear to rotate, the rotation of the first gear drives the second gear and the third gear to rotate, the second gear drives the workpiece to be quenched to rotate, and the third gear drives the lead screw to rotate.

[0015] In one optional embodiment, the displacement adjustment mechanism includes a connector and a telescopic device, one end of the telescopic device is disposed on the base plate, and the other end of the telescopic device is connected to the connector;

[0016] The connecting piece is sleeved on the lead screw, and the rotation of the lead screw drives the displacement adjustment mechanism to move along the horizontal direction of the lead screw;

[0017] The telescopic device is used to adjust the height of the substrate in the vertical direction.

[0018] In one optional embodiment, the toothed plate includes at least two toothed plates; when the toothed plate is engaged with the threaded structure, the lower bottom edge of the toothed plate of the toothed plate is in contact with the bottom of the threaded tooth of the threaded structure, and the median diameter of the toothed plate of the toothed plate coincides with the median diameter of the threaded tooth of the threaded structure.

[0019] In one optional embodiment, during the continuous quenching process of the side surface of the threaded structure, there is a gap between the bottom edge of the toothed plate of the toothed plate and the bottom of the threaded teeth of the threaded mechanism, and the value of the gap is a preset value.

[0020] In one alternative embodiment, the rotational speed of the rotating mechanism is set to 150 to 200 r / min.

[0021] In one alternative embodiment, the thickness of the quenched layer formed on the side surface of the threaded structure is positively correlated with the energy of the laser beam emitted by the laser, and the hardness of the quenched layer is positively correlated with the energy of the laser beam emitted by the laser.

[0022] In one alternative embodiment, the thickness of the quenched layer formed on the side surface of the threaded structure is set to 30 to 50 μm. The hardness of the quenched layer formed on the side surface of the threaded structure is set to 700 to 800 HV.

[0023] The threaded tooth flank surface quenching device provided in this application includes: a rotating mechanism, a lead screw, a displacement adjusting mechanism, a base plate, and a driving device. The lead screw is connected to both the rotating mechanism and the displacement adjusting mechanism, and the displacement adjusting mechanism is also connected to the base plate. A laser and a toothed plate matching the threaded structure are mounted on the base plate. The rotating mechanism holds the workpiece to be quenched, and the workpiece has a threaded structure on its outer side. The driving device drives the rotating mechanism to rotate, which in turn drives the lead screw to rotate. The lead screw rotation causes the displacement adjusting mechanism to move horizontally, which in turn moves the base plate horizontally. During the horizontal movement of the base plate, the laser beam emitted by the laser continuously quenches the flank surface of the threaded structure. This device utilizes laser technology to perform surface quenching on the threaded tooth flank, forming a high-hardness quenching layer of a certain depth on the threaded tooth flank, thus improving the service life of the workpiece thread. Furthermore, this device uses laser technology, producing no waste liquid or dust, reducing environmental pollution during the quenching process. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 is a schematic diagram of the thread tooth flank surface quenching device provided in an embodiment of this application;

[0026] Figure 2 is a partial view of the laser and thread structure during the quenching process provided in the embodiment of this application;

[0027] Figure 3 is a schematic diagram of the drive device and gear structure provided in an embodiment of this application;

[0028] Figure 4 is a structural diagram of the displacement adjustment mechanism provided in an embodiment of this application;

[0029] Figure 5 is a schematic diagram of a substrate structure with a toothed plate provided in an embodiment of this application;

[0030] Figure 6 is a schematic diagram of the engagement of the toothed plate and the threaded structure provided in the embodiment of this application;

[0031] Figure 7 is a flowchart of the thread tooth side quenching process provided in an embodiment of this application;

[0032] Figure 8 is a schematic diagram of the quenching device after quenching provided in the embodiment of this application.

[0033] Reference numerals: 1 Rotating mechanism, 11 First gear, 12 Second gear, 13 Third gear; 2 Lead screw; 3 Displacement adjustment mechanism, 31 Nut, 32 Telescopic rod; 4 Base plate, 41 Toothed plate, 411 Toothed plate, 412 Middle diameter of the toothed plate; 4111 Lower bottom edge of the toothed plate; 5 Drive device, 51 First shaft, 52 Second shaft; 6 Threaded structure, 61 External thread, 62 Middle diameter of the threaded structure, 63 Axis of the shaft of the second gear, 611 Thread tooth tip, 612 Thread tooth root, 613 Thread tooth flank; 7 Laser, 71 First spot, 72 Second spot. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] Taking drill pipes used in oil and gas exploration and development as an example, during the construction of an oil and gas well, the workpiece needs to undergo multiple thread connections and disconnections. Each drill pipe averages over 20 connections and disconnections, resulting in severe wear on the drill pipe threads. Frictional wear between threads occurs on the tooth flanks. When the tooth flanks wear down, the thread thickness decreases, which is visually manifested as a reduction in the tooth tip width and a sharpening effect, leading to a decrease in the load-bearing capacity of the threaded connection. Therefore, when the tooth flanks wear to a certain extent (the tooth tip width decreases to a critical value), the threaded connection fails and needs to be re-machined. Thus, it is necessary to treat the drill pipe thread surface to extend its service life. Current technology involves comprehensive phosphating or copper plating of the drill string thread structure. This involves immersing the entire threaded area in a phosphating bath or electroplating solution, where a wear-resistant phosphating layer or copper is formed on the thread surface through a chemical reaction. However, the waste liquid from phosphating or copper plating contains a large amount of harmful substances and requires treatment. How to perform surface treatment of drill pipe threads in a more environmentally friendly and efficient manner, thereby improving the service life and safety of drill pipe threads, has become an urgent problem that the petroleum industry needs to solve.

[0036] This application provides a thread tooth flank surface quenching device, which includes a laser. The laser efficiently quenches the surface of the thread teeth, forming a high-hardness quenching layer of a certain depth on the thread tooth flank. This not only improves the thread's resistance to friction and wear but also reduces the occurrence of thread sticking during connection, significantly extending the thread's service life and safety. Laser technology requires only a power source, and the entire process does not generate hazardous substances such as waste liquid or dust, making it clean and environmentally friendly.

[0037] In addition, the quenching device of this application is equipped with a toothed plate, which can solve the problem of accurate initial positioning during the quenching process of the thread side surface. It can achieve rapid and accurate positioning of the initial position of the quenching part, improve the quenching efficiency of the thread tooth side surface, and realize industrial application.

[0038] The technical solution of this application will be described in detail below through specific embodiments. It should be noted that the following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0039] Figure 1 is a schematic diagram of a thread tooth flank surface quenching device provided in an embodiment of this application. As shown in Figure 1, the quenching device includes: a rotating mechanism 1, a lead screw 2, a displacement adjusting mechanism 3, a base plate 4, and a driving device 5. The lead screw 2 is connected to the rotating mechanism 1 and the displacement adjusting mechanism 3 respectively. The displacement adjusting mechanism 3 is also connected to the base plate 4. The base plate 4 is provided with a laser 7 and a tooth plate 41 that matches the thread structure 6.

[0040] The rotating mechanism 1 is used to hold the workpiece to be quenched, and the workpiece to be quenched has a threaded structure 6 on its outer side.

[0041] The driving device 5 is used to drive the rotating mechanism 1 to rotate. The rotation of the rotating mechanism 5 drives the lead screw 2 to rotate. The rotation of the lead screw 2 drives the displacement adjustment mechanism 3 to move in the horizontal direction. The displacement adjustment mechanism 3 drives the substrate 4 to move in the horizontal direction.

[0042] As the substrate 4 moves horizontally, the beam emitted by the laser 7 is used to continuously quench the thread tooth flank 613 of the external thread 61.

[0043] In the above embodiments, the quenching device includes a laser mounted on a substrate. The laser beam emitted by the laser performs surface quenching on the threaded structure of the workpiece to be quenched, forming a high-hardness quenching layer of a certain thickness. This not only improves the wear resistance and service life of the threaded structure, but also prevents the generation of harmful substances that pollute the environment during the entire quenching process. Furthermore, the purpose of providing a toothed plate on the substrate is to allow, before quenching, the horizontal position of the substrate to be adjusted so that the toothed plate engages with the threaded mechanism of the workpiece to be quenched, thereby positioning the laser in its initial position and ensuring that the laser beam is aligned with the thread tooth surface of the threaded structure.

[0044] In some embodiments, the toothed plate includes at least two toothed plates. For example, FIG5 is a schematic diagram of a substrate structure configured with a toothed plate according to an embodiment of this application. As shown in FIG5(a), the toothed plate 41 is disposed on the substrate 4, including, for example, three toothed plates. A laser 7 is disposed on the substrate of the toothed plate 41. As shown in FIG5(b), the laser 7 is specifically disposed at the center of the first toothed plate 411 of the toothed plate 41, and is located on the substrate above the toothed plate 41.

[0045] In the above embodiments, the purpose of setting the toothed plate on the substrate is to adjust the horizontal position of the substrate before quenching so that the toothed plate on the substrate engages with the thread mechanism of the workpiece to be quenched, thereby so that the beam emitted by the laser is just projected onto the surface of the thread tooth.

[0046] For example, Figure 6 is a schematic diagram of the engagement of the toothed plate and the threaded structure provided in the embodiment of this application. As shown in Figure 6, when the toothed plate 41 is engaged with the threaded structure 6, the lower bottom edge 4111 of the toothed plate of the toothed plate is in contact with the bottom 612 of the threaded tooth of the threaded structure, and the middle diameter line 412 of the toothed plate of the toothed plate coincides with the middle diameter line 62 of the threaded tooth of the threaded structure.

[0047] The purpose of the locking mechanism is to position the laser at its initial horizontal position. Locking also helps to better determine the initial position of the substrate during the quenching process, achieving accurate positioning and accelerating the quenching efficiency. In some embodiments, the laser emits two beams simultaneously, with the centers of the two beams located at the mid-diameter lines of two adjacent side surfaces of the threaded teeth on the threaded structure, respectively. The included angle between the center lines of the two beams is the same as the included angle between the two adjacent side surfaces of the threaded teeth.

[0048] In the above embodiments, since the laser can emit two beams of light simultaneously, the quenching device can quench the two thread tooth flank surfaces at the same time, thereby improving processing efficiency.

[0049] For example, Figure 2 is a partial view of the laser and the threaded structure during the quenching process. As shown in Figure 2, the laser emits two beams 71 and 72, the centers of which are located at the mid-diameter line 62 of two adjacent side surfaces of the threaded teeth on the helical structure, and the center lines of the two beams form the same angles α and β with the side surfaces of the threaded teeth.

[0050] In the above embodiment, since the centers of the two light spots are located on the median diameter of two adjacent side surfaces of the thread teeth on the thread structure, and the center lines of the two light spots form the same angle with the side surfaces of the thread teeth, the positions of the quenched layers generated on both sides of the thread are symmetrical and evenly distributed.

[0051] In some embodiments, the two light spots include a first light spot and a second light spot, and the light spots are elongated on the side surface of the threaded teeth. The length of the first light spot is less than or equal to the length of the side surface of the threaded teeth corresponding to the first light spot; the length of the second light spot is less than or equal to the length of the side surface of the threaded teeth corresponding to the second light spot.

[0052] For example, referring to Figure 2, L1 and L2 are the lengths of the light spot formed on the thread tooth flank surface. The lengths of L1 and L2 are the same and approximately close to the length of L0 on the thread tooth flank surface. The lengths of L1 and L2 will not be greater than L, so that the range of the light spot on the thread tooth flank surface will not exceed the slope of the thread tooth flank surface.

[0053] In the above embodiments, the shape of the light spot is set to be elongated, so that the heating of the thread tooth side surface is uniform during the quenching process, thereby generating a consistent quenched layer thickness. In addition, the length of the light spot is set to be less than or equal to the slope length of the side surface of the thread tooth corresponding to the light spot. The purpose is to ensure that the quenched layer generation range on the side surface of the thread tooth is limited to the side surface of the thread tooth and does not affect the top and bottom of the thread tooth.

[0054] Figure 3 is a schematic diagram of the drive device and gear structure. As shown in Figure 3, the rotating mechanism 1 includes a first gear 11, a second gear 12, and a third gear 13. The first gear 11 meshes with the second gear 12 and the third gear 13. The workpiece to be quenched is mounted on the rotating shaft 52 of the second gear, and the lead screw 2 is mounted on the third gear. The drive device 5 is used to drive the first gear 11 to rotate. The rotation of the first gear 11 drives the second gear 12 and the third gear 13 to rotate. The second gear 12 drives the workpiece to be quenched to rotate, and the third gear 13 drives the lead screw to rotate.

[0055] Optionally, the drive device 5 can drive the first shaft 51 to rotate, thereby driving the first gear to rotate.

[0056] It should be noted that during the quenching process in the above-mentioned quenching device, the rotational speed of the workpiece to be quenched is different from that of the lead screw. The rotating mechanism includes multiple gears, which drive the rotation of the workpiece and the lead screw through gear transmission. By adjusting the gear transmission ratio, the rotational speeds between the lead screw and the rotating mechanism can be made to achieve a certain ratio. The speed between the rotating mechanism and the lead screw can be expressed by the following relationship: for every revolution of the rotating mechanism, the distance the lead screw drives the toothed plate to move horizontally is one pitch; the rotational speeds of the rotating mechanism and the lead screw are adjustable.

[0057] In the above embodiments, the transmission ratio is changed by replacing the driving gear and driven gear with different numbers of teeth. If the number of teeth on the driven gear is increased or the number of teeth on the driving gear is decreased, the transmission ratio will increase, the output speed will increase, and the torque will decrease; conversely, if the number of teeth on the driven gear is decreased or the number of teeth on the driving gear is increased, the transmission ratio will decrease, the output speed will decrease, and the torque will increase.

[0058] For example, Figure 4 is a structural diagram of the displacement adjustment mechanism provided in this application. As shown in Figure 4, the displacement adjustment mechanism includes a connector 31 and a telescopic device 32. One end of the telescopic device 32 is disposed on the substrate 4, and the other end of the telescopic device 32 is connected to the connector 31. The connector is sleeved on the lead screw 2, and the rotation of the lead screw 2 drives the displacement adjustment mechanism 3 to move along the horizontal direction of the lead screw 2. The displacement adjustment mechanism 3 includes the telescopic device 32, which is used to adjust the height of the substrate 4 in the vertical direction.

[0059] For example, the connector is the nut 31 shown in Figure 4, which has a telescopic rod 32 for displacement adjustment. The telescopic rod 32 is connected to the base plate 4, which has a toothed plate 41 and a laser 7. When the lead screw 2 rotates, the threads on the lead screw rub against the nut 31. The frictional force acting on the nut 31 causes the nut 31 to generate a thrust in the same direction as the axis of the lead screw 2, thereby causing the displacement adjustment mechanism 3 to move horizontally, and simultaneously driving the base plate 4 connected to the displacement adjustment mechanism to move horizontally.

[0060] Optionally, the telescopic device can be a telescopic rod. The length of the telescopic rod can be freely adjusted according to the size of the space.

[0061] Optionally, the connecting component can be a conventional nut or a ball nut. A ball nut, by having balls rolling between the screw and the nut, significantly reduces energy loss caused by traditional sliding friction, thereby improving transmission efficiency.

[0062] In some embodiments, the displacement adjustment mechanism is also used to adjust the vertical movement of the substrate.

[0063] Referring to Figure 4, the displacement adjustment mechanism includes a telescopic device, and the operator can adjust the height of the base plate by setting the height value of the telescopic device.

[0064] In some embodiments, during the continuous quenching process of the side surface of the threaded structure, there is a gap between the bottom edge of the toothed plate of the toothed plate and the bottom of the threaded tooth of the threaded mechanism, and the value of the gap is a preset value.

[0065] As shown in Figure 1, during positioning before quenching, since the base plate 4 is connected to the toothed plate 41, the base plate 4 is raised by a height L, resulting in a gap between the bottom edge 4111 of the toothed plate and the bottom of the threaded teeth of the thread mechanism. The value of the gap is the preset value L. Note: L is the value calculated by the operator before quenching.

[0066] In the above embodiments, the purpose of setting the gap is to prevent the thread teeth from rubbing against the tooth plate during the quenching process, which would damage the thread teeth.

[0067] In some embodiments, the rotational speed of the rotating mechanism is set to 150 to 200 r / min.

[0068] In some embodiments, the thickness of the hardened layer formed on the side surface of the threaded structure is positively correlated with the energy of the laser beam emitted by the laser. The stronger the laser beam energy, the thicker the hardened layer.

[0069] In some embodiments, the hardness of the hardened layer is positively correlated with the energy of the laser beam emitted by the laser. The stronger the energy of the laser beam emitted by the laser, the harder the hardened layer.

[0070] Optionally, the beam energy can be set to 5 J / cm. 2 ·s, where cm 2 ·s represents the energy applied per second per unit square centimeter.

[0071] Optionally, the thickness of the hardened layer on the thread tooth flank surface is 3050 μm. The microhardness of the hardened layer is 700-800 HV. HV is an abbreviation for Vickers hardness. Vickers hardness is a widely used material hardness testing method used to evaluate a material's ability to resist localized compressive stress.

[0072] Based on the quenching apparatus of the foregoing embodiments, the operation process of the quenching apparatus will be described below with reference to Figures 1 and 7.

[0073] Figure 7 is an operation flowchart of the quenching device provided in the embodiment of this application. As shown in Figure 7, the operation flow of the quenching device includes:

[0074] S1: The threaded structure to be quenched is clamped and fixed on the rotating mechanism.

[0075] S2: Activate the displacement adjustment mechanism to adjust the movement of the substrate. Adjust the substrate so that the toothed plate on it engages with the thread to determine the starting point of the substrate movement.

[0076] In one example, as shown in Figure 6, the toothed plate 41 on the substrate is engaged with the threaded structure. After engagement, the starting point for the displacement adjustment mechanism to begin moving on the lead screw can be determined.

[0077] S3: Raise the substrate to a certain height so that the two beams of light emitted by the laser fixed on the substrate are directly aligned with the median diameter of the tooth flank of the thread to be hardened, and the size of the beam does not exceed the slope length of the thread tooth flank surface. After determining this, keep the substrate height and laser parameters unchanged.

[0078] Among them, laser parameters include the emission angle values ​​of the two beams emitted by the laser and the emission power.

[0079] In one example, as shown in Figure 1, during the quenching process, the laser 7 maintains the same height L (i.e., the height at which the substrate is raised) as shown in Figure 1 with the thread tooth side 613, and the laser beam emitted by the laser will not be projected onto the thread tooth tip 611 and thread tooth bottom 612. This ensures that after quenching, the quenched layer on the side surface of the thread tooth is limited to the thread tooth side and does not affect the thread tooth tip and thread tooth bottom.

[0080] S4: Start the rotating mechanism and set the rotation direction of the rotating mechanism according to the thread direction.

[0081] In one example, if the thread is a right-hand thread, the rotating mechanism rotates in the opposite direction.

[0082] In another example, if the thread is a reverse thread, the rotating mechanism rotates in the forward direction.

[0083] S5: Activate the laser to emit two beams of light to continuously harden the surface of the threaded tooth.

[0084] In one example, as shown in Figure 1, under the linkage action of the lead screw 2, the substrate 4 moves at a constant speed in the horizontal direction, causing the light spots 71 and 72 emitted by the laser 7 to continuously quench the tooth sides of the rotating thread structure.

[0085] It should be noted that S4 and S5 can be executed simultaneously or sequentially, and this embodiment does not limit this.

[0086] S6: After completing the surface hardening of all threads, stop the rotation of the rotating mechanism, stop the laser from emitting light spots, stop the lead screw from rotating, and the hardening of the thread tooth sides of the entire thread structure is completed.

[0087] For example, after the quenching process is completed, the quenching device is configured as shown in Figure 8. The drive device 5 is turned off, the rotating mechanism 1 stops rotating, causing the lead screw 2 and the thread structure 6 to stop rotating, and the displacement adjustment mechanism 3 to stop moving horizontally. The laser 7 stops emitting light spots. The quenching of the thread tooth flank 613 is completed, and the quenching process ends.

[0088] S7: Remove the threaded structure and place the new threaded structure to be quenched.

[0089] Repeat the above steps until the quenching requirements for all workpiece thread tooth flanks are met.

[0090] The above operation process provides a method for industrial-scale thread tooth flank surface quenching. The tooth plate engagement technology enables more precise laser positioning and is convenient to operate, thus facilitating industrialization.

[0091] Finally, it should be noted that other embodiments of this application will readily conceive of by those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0092] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A device for quenching the surface of threaded teeth, characterized in that, include: The system comprises a rotating mechanism, a lead screw, a displacement adjusting mechanism, a base plate, and a driving device. The lead screw is connected to the rotating mechanism and the displacement adjusting mechanism, respectively. The displacement adjusting mechanism is also connected to the base plate. The base plate is provided with a laser and a toothed plate that matches the thread structure. The rotating mechanism is used to hold the workpiece to be quenched, and the workpiece to be quenched has a threaded structure on its outer side. The driving device is used to drive the rotating mechanism to rotate, the rotation of the rotating mechanism drives the lead screw to rotate, the rotation of the lead screw drives the displacement adjustment mechanism to move in the horizontal direction, and the displacement adjustment mechanism drives the substrate to move in the horizontal direction; As the substrate moves horizontally, the laser beam emitted by the laser is used to continuously quench the side surface of the threaded structure.

2. The quenching apparatus according to claim 1, characterized in that, The laser emits two beams of light simultaneously. The centers of the two beams of light are located on the median diameter of two adjacent side surfaces of the threaded teeth on the threaded structure, and the included angle between the center lines of the two beams of light is the same as the included angle between the two adjacent side surfaces of the threaded teeth.

3. The quenching apparatus according to claim 2, characterized in that, The two light spots include a first light spot and a second light spot. The light spots are elongated light spots. The length of the first light spot is less than or equal to the length of the side surface of the threaded tooth corresponding to the first light spot. The length of the second light spot is less than or equal to the length of the side surface of the threaded tooth corresponding to the second light spot.

4. The quenching apparatus according to claim 1, characterized in that, The rotating mechanism includes a first gear, a second gear, and a third gear, wherein the first gear meshes with the second gear and the third gear respectively; the workpiece to be quenched is mounted on the rotating shaft of the second gear, and the lead screw is mounted on the third gear; The driving device is used to drive the first gear to rotate, the rotation of the first gear drives the second gear and the third gear to rotate, the second gear drives the workpiece to be quenched to rotate, and the third gear drives the lead screw to rotate.

5. The quenching apparatus according to claim 1, characterized in that, The displacement adjustment mechanism includes a connector and a telescopic device. One end of the telescopic device is disposed on the base plate, and the other end of the telescopic device is connected to the connector. The connecting piece is sleeved on the lead screw, and the rotation of the lead screw drives the displacement adjustment mechanism to move along the horizontal direction of the lead screw; The telescopic device is used to adjust the height of the substrate in the vertical direction.

6. The quenching apparatus according to any one of claims 1 to 5, characterized in that, The toothed plate includes at least two toothed plates. When the toothed plate is engaged with the threaded structure, the bottom edge of the toothed plate of the toothed plate is in contact with the bottom of the threaded tooth of the threaded structure, and the mean diameter line of the toothed plate of the toothed plate coincides with the mean diameter line of the threaded tooth of the threaded structure.

7. The quenching apparatus according to any one of claims 1 to 6, characterized in that, During the continuous quenching process on the side surface of the threaded structure, there is a gap between the bottom edge of the toothed plate of the toothed plate and the bottom of the threaded teeth of the threaded mechanism, and the value of the gap is a preset value.

8. The quenching apparatus according to any one of claims 1 to 7, characterized in that, The rotational speed of the rotating mechanism is set between 150 and 200 r / min.

9. The quenching apparatus according to any one of claims 1 to 8, characterized in that, The thickness of the quenched layer formed on the side surface of the threaded structure is positively correlated with the energy of the laser beam emitted by the laser, and the hardness of the quenched layer is positively correlated with the energy of the laser beam emitted by the laser.

10. The quenching apparatus according to any one of claims 1 to 9, characterized in that, The thickness of the quenched layer formed on the side surface of the threaded structure is set to 30 to 50 μm, and the hardness of the quenched layer formed on the side surface of the threaded structure is set to 700 to 800 HV.

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