An induction hardening equipment for shaft-type parts

Abstract

This invention provides an induction hardening device for shaft parts, relating to the field of metal heat treatment technology. The induction hardening device for shaft parts includes a housing, a rotary clamping device, an axial feed device, an induction hardening device, a straightening device, and a controller. The rotary clamping device and the axial feed device are both disposed in the housing, and the induction hardening device is disposed in the axial feed device. The straightening device includes a support ring frame, a bending deformation detection sensor, and a straightening assembly. The support ring frame is disposed in the axial feed device, and the bending deformation detection sensor is disposed in the support ring frame for detecting the radial runout of the shaft workpiece. The straightening assembly is disposed in the support ring frame for applying a straightening force to the shaft workpiece. The controller is electrically connected to both the bending deformation detection sensor and the straightening assembly, and is used to control the straightening assembly to apply a straightening force to the shaft workpiece when the radial runout exceeds a preset runout. This device can improve the bending deformation of shaft parts and enhance the hardening quality of the shaft parts.

Description

Technical Field

[0001] This invention relates to the field of metal heat treatment technology, and more specifically, to an induction hardening device for shaft-type parts. Background Technology

[0002] Medium- and high-frequency induction hardening is an important process widely used in the heat treatment of metal surfaces. Its working principle involves generating an alternating magnetic field through an alternating current in an induction coil. This induces eddy currents on the surface of a workpiece placed in the magnetic field, rapidly raising the surface temperature above the phase transformation temperature. Subsequent rapid cooling (quenching) results in a high-hardness surface hardened layer and a core that retains good toughness, achieving a comprehensive mechanical property. This process is particularly suitable for surface strengthening of shaft parts, such as automotive half-shafts, drive shafts, motor rotor shafts, and machine tool guideways, significantly improving their wear resistance and fatigue life.

[0003] However, in the process of machining shaft parts, existing induction hardening equipment generates a complex and intense thermal stress distribution between the heating and cooling zones. This thermal stress can easily cause instantaneous and uneven bending deformation of shaft parts during machining, thus adversely affecting the quenching quality. Summary of the Invention

[0004] The purpose of this invention is to provide an induction hardening equipment for shaft parts, which can improve the bending deformation of shaft parts during the induction hardening process and improve the hardening quality of shaft parts.

[0005] The embodiments of the present invention are implemented as follows: This invention provides an induction hardening device for shaft-type parts, comprising: chassis; A rotary clamping device is disposed in the housing and is used to clamp the shaft workpiece and drive the shaft workpiece to rotate; An axial feed device is disposed within the housing and is used to move relative to the housing along the axial direction of the workpiece. An induction hardening device is provided on the axial feed device and is used to perform induction hardening on the shaft workpiece. A straightening device, comprising a support ring frame, a bending deformation detection sensor, and a straightening assembly, wherein the support ring frame is disposed on the axial feed device and is used for the shaft workpiece to pass through; the bending deformation detection sensor is disposed on the support ring frame and is used for detecting the radial runout of the shaft workpiece; the straightening assembly is disposed on the support ring frame and is used for applying a straightening force to the shaft workpiece; and The controller is electrically connected to both the bending deformation detection sensor and the straightening assembly, and is used to control the straightening assembly to apply a straightening force to the shaft workpiece when the radial runout is greater than a preset runout.

[0006] In an optional embodiment, the straightening assembly includes a first driving member and a straightening roller. The first driving member is disposed on the support ring frame, the straightening roller is connected to the first driving member, and the straightening roller is used for rolling contact with the surface of the shaft workpiece; the controller is electrically connected to the first driving member.

[0007] In an optional embodiment, the outer periphery of the straightening roller is provided with an arc-shaped groove, which is used to make rolling contact with the surface of the shaft workpiece, and the curvature of the arc-shaped groove is the same as the surface curvature of the shaft workpiece.

[0008] In an optional embodiment, there are multiple correction components, which are spaced apart circumferentially along the support ring frame, and the controller is electrically connected to multiple correction components simultaneously. Wherein, when the radial runout is greater than the preset runout, the controller is used to control the straightening component corresponding to the bending direction of the shaft workpiece to apply a straightening force to the shaft workpiece.

[0009] In an optional embodiment, the support ring frame includes a first arc-shaped frame and a second arc-shaped frame, one end of the first arc-shaped frame is hinged to one end of the second arc-shaped frame, and the other end of the first arc-shaped frame is detachably connected to the other end of the second arc-shaped frame. The axial feed device is connected to the second arc frame and is located near the hinge between the second arc frame and the first arc frame; the first arc frame is provided with at least one bending deformation detection sensor and at least one correction component, and the second arc frame is provided with at least one bending deformation detection sensor and at least one correction component.

[0010] In an optional embodiment, the induction hardening equipment for shaft parts further includes a first coolant nozzle and a first coolant pipe. The first coolant nozzle is disposed on the support ring frame and is used to spray coolant toward the shaft workpiece. The first coolant pipe is connected to the first coolant nozzle.

[0011] In an optional embodiment, the induction hardening equipment for shaft parts further includes a spraying device disposed within the housing; wherein the spraying device includes a fixed plate, a lifting plate, a second driving member, a second coolant nozzle, and a second coolant pipe; the fixed plate is fixed to the inner wall of the housing, and the lifting plate is spaced apart from the fixed plate; the fixed end of the second driving member is connected to the fixed plate, and the movable end of the second driving member is connected to the lifting plate; the second coolant nozzle is disposed on the lifting plate, and the second coolant pipe communicates with the second coolant nozzle.

[0012] In an optional embodiment, the rotary clamping device includes a first motor, a second motor, a first clamping member, and a second clamping member. The first motor and the second motor are respectively disposed on opposite side walls of the housing. The first clamping member is connected to the first motor, and the second clamping member is connected to the second motor. Both the first clamping member and the second clamping member are located inside the housing and are respectively used to clamp the two ends of the shaft workpiece.

[0013] In an optional embodiment, the axial feed device includes a support plate, a first mounting plate, a second mounting plate, a lead screw, a ball nut, a slider, a slide rail, and a third motor. The support plate is fixed to the inner wall of the housing. The first mounting plate and the second mounting plate are respectively disposed at both ends of the support plate. The two ends of the lead screw are rotatably connected to the first mounting plate and the second mounting plate, respectively. The third motor is disposed on the first mounting plate or the second mounting plate and is connected to the lead screw for transmission. The slide rail is disposed on the support plate and is located between the first mounting plate and the second mounting plate. The ball nut is threadedly engaged with the lead screw. The slider is disposed on the ball nut and is slidably engaged with the slide rail. The induction hardening device and the support ring frame are both connected to the slider.

[0014] In an optional embodiment, the induction hardening equipment for shaft parts further includes a drain pipe and a liquid receiving box, wherein the drain pipe is disposed at the bottom of the housing and the liquid receiving box is disposed on one side of the housing; The liquid receiving box has wheels at the bottom and an opening at the top; one end of the drain pipe passes through the side wall of the housing and is located at the opening.

[0015] The beneficial effects of the embodiments of the present invention include: The induction hardening equipment for shaft parts provided in this embodiment, by mounting both the induction hardening device and the straightening device on the axial feed device, can move synchronously with the axial feed device. This allows for simultaneous detection and correction of the radial runout of the shaft workpiece during induction hardening. Specifically, a bending deformation detection sensor monitors the radial runout of the shaft workpiece in real time during the hardening process. When the radial runout exceeds a preset amount, it indicates that the shaft workpiece has begun to bend. At this point, the controller controls the straightening component to apply a straightening force to the shaft workpiece to prevent bending deformation. This process provides reverse intervention at the initial stage of bending deformation, thereby continuously suppressing the bending tendency of the shaft workpiece during the dynamic process of quenching heating and cooling. This ensures a uniform gap between the shaft workpiece and the induction hardening device, guaranteeing circumferential consistency of quenching heating and cooling, and thus improving the hardening quality of the shaft parts. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of an induction hardening equipment for shaft parts provided in an embodiment of the present invention; Figure 2 This is a schematic diagram showing the assembly of the axial feeding device, the induction hardening device, and the straightening device provided in an embodiment of the present invention. Figure 3 This is a schematic diagram of the structure of the spraying device provided in an embodiment of the present invention; Figure 4 This is a partial structural schematic diagram of an induction hardening device for shaft parts provided in an embodiment of the present invention; Figure 5 This is a first-view assembly diagram of the axial feed device and the induction hardening device provided in an embodiment of the present invention. Figure 6 This is a second-view assembly diagram of the axial feed device and the induction hardening device provided in an embodiment of the present invention.

[0018] Icons: 100-Induction hardening equipment for shaft parts; 10-Machine housing; 11-Observation port; 12-Moving door; 20-Rotary clamping device; 21-First motor; 22-Second motor; 23-First clamping component; 30-Axial feed device; 31-Support plate; 32-First mounting plate; 33-Lead screw; 34-Ball nut; 35-Slider; 36-Slide rail; 37-Orienting block; 38-Bearing plate; 39-Second fastener; 40-Induction hardening device; 41-Power supply; 42-Induction coil; 43-Magnetic conductor; 50-Correcting device; 51-Support Support ring frame; 511-First arc frame; 512-Second arc frame; 513-First fastener; 514-Rotating shaft; 52-Bending deformation detection sensor; 53-Correcting assembly; 531-First driving component; 532-Correcting roller; 60-Controller; 71-First coolant nozzle; 72-First coolant pipe; 80-Spraying device; 81-Fixed plate; 82-Lifting plate; 83-Second driving component; 84-Second coolant nozzle; 85-Second coolant pipe; 91-Drain pipe; 92-Collection box; 921-Opening; 001-Shaft workpiece. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0024] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] As described in the background section, existing induction hardening equipment generates complex and intense thermal stress distribution between the heating and cooling zones during the processing of shaft parts. This thermal stress can easily cause instantaneous and uneven bending deformation of shaft parts during processing, thus adversely affecting the hardening quality.

[0026] Based on this, please refer to Figures 1-6 The present invention provides an induction hardening apparatus 100 for shaft parts, which can effectively improve the aforementioned technical problems. Specifically, it can effectively reduce the bending deformation of shaft parts during the induction hardening process, thereby improving the hardening quality of shaft parts. The induction hardening apparatus 100 for shaft parts will be described in detail below.

[0027] Please refer to Figure 1 , Figure 1 This is a structural schematic diagram of the induction hardening equipment 100 for shaft parts provided in this embodiment, combined with... Figure 1The induction hardening equipment 100 for shaft parts includes a housing 10, a rotary clamping device 20, an axial feed device 30, an induction hardening device 40, a straightening device 50, and a controller 60. The rotary clamping device 20 is disposed in the housing 10 and is used to clamp the shaft workpiece 001 and drive the shaft workpiece 001 to rotate; the axial feed device 30 is disposed inside the housing 10 and is used to move relative to the housing 10 along the axial direction of the shaft workpiece 001; the induction hardening device 40 is disposed on the axial feed device 30 and is used to perform induction hardening on the shaft workpiece 001; the straightening device 50 is disposed on the axial feed device 30 and is used to inspect and straighten the workpiece.

[0028] For details, please refer to Figure 2 , Figure 2 This is an assembly diagram of the axial feed device 30, induction hardening device 40, and straightening device 50 provided in this embodiment, combined with... Figure 1 and Figure 2 The straightening device 50 includes a support ring frame 51, a bending deformation detection sensor 52, and a straightening assembly 53. The support ring frame 51 is disposed on the axial feed device 30 and is used for the shaft workpiece 001 to pass through. The bending deformation detection sensor 52 is disposed on the support ring frame 51 and is used to detect the radial runout of the shaft workpiece 001. The straightening assembly 53 is disposed on the support ring frame 51 and is used to apply a straightening force to the shaft workpiece 001. The controller 60 is electrically connected to both the bending deformation detection sensor 52 and the straightening assembly 53, and is used to control the straightening assembly 53 to apply a straightening force to the shaft workpiece 001 when the radial runout is greater than a preset runout.

[0029] It is easy to understand that by setting both the induction hardening device 40 and the straightening device 50 on the axial feed device 30, they can move synchronously with the axial feed device 30, so that the straightening device 50 always closely follows the heating zone of the shaft workpiece 001 or is distributed on both sides of the heating zone, thereby simultaneously detecting and correcting the radial runout of the shaft workpiece 001 while performing induction hardening on the shaft workpiece 001.

[0030] Specifically, the bending deformation detection sensor 52 monitors the radial runout of the shaft workpiece 001 in real time during the quenching process. When the radial runout exceeds a preset amount, it indicates that the shaft workpiece 001 has begun to bend. At this time, the controller 60 controls the straightening component 53 to apply a straightening force to the shaft workpiece 001 to prevent bending deformation. This process can apply reverse intervention at the initial stage of bending deformation, thereby continuously suppressing the bending tendency of the shaft workpiece 001 during the dynamic process of quenching heating and cooling. This ensures that the gap between the shaft workpiece 001 and the induction hardening device 40 remains uniform, guaranteeing the circumferential consistency of quenching heating and cooling, and thus improving the quenching quality of shaft parts.

[0031] In particular, for slender shaft parts, the induction hardening equipment 100 can effectively reduce the radial runout after hardening, improve the uniformity of the hardened layer depth along the circumferential and axial directions, and enhance the stability of hardness distribution. Simultaneously, because the deformation of the shaft workpiece 001 is actively controlled, the straightness of the shaft workpiece 001 after hardening is improved, reducing the likelihood of scrap due to excessive deformation and reducing or eliminating the need for subsequent straightening processes. This helps reduce production costs and improve the hardening accuracy of shaft parts.

[0032] It should be noted that, in order to achieve rapid cooling of the shaft workpiece 001, the induction hardening equipment also includes a spray device 80, which is installed inside the housing 10.

[0033] In this embodiment, the controller 60 is also electrically connected to the rotary clamping device 20, the axial feed device 30, the induction hardening device 40, and the spraying device 80, which can realize automated clamping of the shaft workpiece 001, and control the rotational speed, induction hardening frequency, heating temperature and cooling temperature of the shaft workpiece 001, as well as control the moving speed of the induction hardening device 40 and the straightening device 50, thereby improving the automation and intelligence level of the equipment.

[0034] Please continue to combine Figure 2 The straightening assembly 53 includes a first drive member 531 and a straightening roller 532. The first drive member 531 is disposed on the support ring frame 51, and the straightening roller 532 is connected to the first drive member 531 and is used for rolling contact with the surface of the shaft workpiece 001. The controller 60 is electrically connected to the first drive member 531.

[0035] Understandably, the first driving component 531 drives the straightening roller 532 to move towards the shaft workpiece 001 and contact its surface, thereby applying a straightening force. This rolling engagement between the straightening roller 532 and the shaft workpiece 001 improves the uniformity of pressure applied to the surface of the shaft workpiece 001 and enhances the straightness of the quenched workpiece. Simultaneously, the controller 60, electrically connected to the first driving component 531, can calculate the straightening force corresponding to the detected radial runout based on the detected radial runout, thereby further improving the quenching quality and precision.

[0036] It should be noted that in this embodiment, the first driving component 531 is a cylinder, the fixed end of which is connected to the support ring frame 51, and the movable end of which is connected to the straightening roller 532. Of course, in some other embodiments, the first driving component 531 may also be a hydraulic cylinder or an electric push rod, or other driving structures.

[0037] To increase the contact area between the support roller and the shaft workpiece 001, in this embodiment, the outer periphery of the straightening roller 532 is provided with an arc-shaped groove. The arc-shaped groove is used for rolling contact with the surface of the shaft workpiece 001, and the curvature of the arc-shaped groove is the same as the surface curvature of the shaft workpiece 001. In this way, the contact stress between the straightening roller 532 and the shaft workpiece 001 can be reduced, avoiding scratches on the workpiece surface, while also providing more stable support.

[0038] Alternatively, the support rollers can be made of heat-resistant alloy steel or ceramic, which can ensure the stability of the applied corrective force.

[0039] Combination Figure 2 To further improve the straightening accuracy of shaft parts, multiple straightening components 53 can be used. These multiple straightening components 53 are spaced apart circumferentially along the support ring frame 51, and the controller 60 is electrically connected to multiple straightening components 53 simultaneously. When the radial runout exceeds a preset runout, the controller 60 controls the straightening component 53 corresponding to the bending direction of the shaft workpiece 001 to apply a straightening force to the shaft workpiece 001.

[0040] Understandably, the controller 60 is configured to: calculate and control each first drive element 531 to independently output a corresponding corrective force in real time based on the real-time radial runout signal detected by the bending deformation detection sensor 52, according to a preset control algorithm (e.g., PID control), so as to actively suppress the bending deformation of the shaft workpiece 001 during the quenching process.

[0041] It should be noted that in this embodiment, there are two correction components 53, located above and below the support ring frame 51, respectively. This symmetrical layout effectively counteracts vertical bending caused by its own weight and thermal stress, resulting in a simple structure and direct control. Of course, in other embodiments, the number of correction components 53 can be three or four, etc.

[0042] Furthermore, it should be noted that the number of bending deformation detection sensors 52 can also be multiple, with multiple bending deformation detection sensors 52 arranged at circumferential intervals along the support ring frame 51. For example, one bending deformation detection sensor 52 can be arranged in both the horizontal and vertical directions to more comprehensively detect the bending state of the workpiece in two orthogonal directions. In this embodiment, the bending deformation detection sensor 52 is an eddy current sensor, which has the characteristics of non-contact operation, fast response, and strong anti-interference ability, making it suitable for operation in harsh environments such as quenching where there is water mist and electromagnetic fields.

[0043] Specifically, the support ring frame 51 includes a first arc-shaped frame 511 and a second arc-shaped frame 512. One end of the first arc-shaped frame 511 is hinged to one end of the second arc-shaped frame 512, and the other end of the first arc-shaped frame 511 is detachably connected to the other end of the second arc-shaped frame 512. The axial feed device 30 is connected to the second arc-shaped frame 512 and is located near the hinge point between the second arc-shaped frame 512 and the first arc-shaped frame 511. The first arc-shaped frame 511 is equipped with at least one bending deformation detection sensor 52 and at least one correction component 53, and the second arc-shaped frame 512 is also equipped with at least one bending deformation detection sensor 52 and at least one correction component 53.

[0044] It is readily understood that the support ring frame 51 in this embodiment adopts a split, openable structure. By detaching one end of the first arc-shaped frame 511 from the other end of the second arc-shaped frame 512 and rotating the first arc-shaped frame 511 relative to the second arc-shaped frame 512, the support ring frame 51 can be opened, facilitating the insertion and removal of the shaft workpiece 001. Furthermore, at least one correction component 53 and a bending deformation detection sensor 52 are provided on both the first arc-shaped frame 511 and the second arc-shaped frame 512, which can further improve the accuracy of detection and correction.

[0045] Specifically, in this embodiment, the support ring frame 51 further includes a first fastener 513 and a rotating shaft 514. The rotating shaft 514 is disposed on the axial feeding device 30. One end of the first arc frame 511 and one end of the second arc frame 512 are rotatably engaged by the rotating shaft 514. The other end of the first arc frame 511 and the other end of the second arc frame 512 are connected and fixed by the first fastener 513.

[0046] Please continue to combine Figure 2 The induction hardening equipment 100 for shaft parts also includes a first coolant nozzle 71 and a first coolant pipe 72. The first coolant nozzle 71 is disposed on the support ring frame 51 and is used to spray coolant toward the shaft workpiece 001. The first coolant pipe 72 is connected to the first coolant nozzle 71.

[0047] Understandably, the first coolant pipe 72 can be connected to the coolant supply tank, and the coolant in the coolant supply tank can be delivered to the first coolant nozzle 71 by a coolant pump. By setting the first coolant nozzle 71, coolant can be locally sprayed onto the surface of the shaft workpiece 001. The first coolant nozzle 71 can be set near the support roller or independently on the support ring frame 51. While the controller 60 outputs the corrective force for mechanical straightening, the first coolant nozzle 71 can also be used to locally enhance the cooling of the bent bulge side of the shaft workpiece 001, using the martensitic phase transformation expansion and thermal contraction effect to generate an additional thermal stress straightening effect. This dual control method of "mechanical force + thermal stress" further enhances the ability to suppress complex deformation modes.

[0048] According to the above description, the processing procedure of the shaft workpiece 001 by the induction hardening equipment 100 for shaft parts provided in this embodiment is as follows: After the equipment is started, the rotary clamping device 20 drives the shaft workpiece 001 to rotate at a constant speed, and the axial feeding device 30 drives the induction hardening device 40 and the straightening device 50 to move axially from one end of the shaft workpiece 001 to the other end. The induction hardening device 40 is started to heat the surface of the shaft workpiece 001, and then the first coolant nozzle 71 sprays coolant to perform quenching.

[0049] During this process, when the controller 60 detects that the radial runout of the shaft workpiece 001 in a certain direction exceeds the preset runout, it indicates that the shaft workpiece 001 has started to bend in that direction. At this time, the controller 60 immediately commands the first drive member 531 of the correction component 53 located in the bending direction to act, driving the support roller to apply a precise reverse correction force to the surface of the shaft workpiece 001.

[0050] By setting the straightening device 50 to move synchronously with the induction hardening device 40 and utilizing closed-loop feedback control to actively output the straightening force, reverse intervention can be applied at the initial stage of bending deformation of the shaft workpiece 001, thereby continuously suppressing the bending trend at the source of thermal stress. This process effectively ensures that the gap between the shaft workpiece 001 and the induction hardening device 40 remains uniform throughout the quenching process, thus ensuring the consistency of quenching heating and cooling in the circumferential direction. Simultaneously, since multiple straightening components 53 employ independently controllable first drive components 531, the direction of force application can be flexibly adjusted according to the real-time detected bending direction, adapting to the deformation trends of the workpiece at different stages and in different directions, resulting in high control precision and fast response. Ultimately, for slender shaft parts, this effectively reduces the radial runout after quenching, improves the uniformity of the hardened layer depth along the circumferential and axial directions, enhances the stability of hardness distribution, reduces the scrap rate due to excessive deformation, and can also reduce or eliminate subsequent straightening processes.

[0051] Please refer to Figure 3 , Figure 3 This is a schematic diagram of the structure of the spray device 80 provided in this embodiment, combined with... Figure 1 and Figure 3 The spraying device 80 includes a fixed plate 81, a lifting plate 82, a second driving member 83, a second coolant nozzle 84, and a second coolant pipe 85. The fixed plate 81 is fixed to the inner wall of the housing 10, and the lifting plate 82 is spaced apart from the fixed plate 81. The fixed end of the second driving member 83 is connected to the fixed plate 81, and the movable end of the second driving member 83 is connected to the lifting plate 82. The second coolant nozzle 84 is disposed on the lifting plate 82, and the second coolant pipe 85 is connected to the second coolant nozzle 84.

[0052] The lifting plate 82 is raised and lowered by the second driving component 83. The distance between the second coolant nozzle 84 and the workpiece surface can be adjusted according to the different diameter shaft workpieces 001 to obtain the best cooling effect and spray pressure, thus improving the versatility of the equipment. At the same time, the lifting function also facilitates the cleaning or replacement of the nozzles during equipment maintenance.

[0053] It should be noted that there can be multiple second coolant nozzles 84 and multiple second drive components 83. Multiple second coolant nozzles 84 and multiple second drive components 83 are arranged at intervals along the extension direction of the lifting plate 82, which can also be understood as being arranged at intervals along the axial direction of the shaft workpiece 001. This can improve the lifting stability of the lifting plate 82 and the uniformity of the sprayed coolant, thereby further improving the cooling effect on the shaft workpiece 001.

[0054] Additionally, it should be noted that in this embodiment, the second driving component 83 is a cylinder; of course, in other embodiments, the second driving component 83 may also be a hydraulic cylinder or an electric push rod or other driving structure.

[0055] Please combine Figure 2 and Figure 3 In this embodiment, the first coolant pipe 72 is connected to the second coolant pipe 85, and one end of the second coolant pipe 85 is connected to the coolant supply tank, which can reduce the connection length of the pipes, thereby reducing costs and optimizing the layout between the pipes.

[0056] Furthermore, an electrically controlled valve (not shown in the figure) is provided on the first coolant pipe 72, and the controller 60 is electrically connected to the electrically controlled valve. By controlling the opening and closing of the solenoid valve, the aforementioned function of localized enhanced cooling of the bent deformation part of the shaft workpiece 001 can be achieved while ensuring normal cooling and quenching.

[0057] Please refer to Figure 4 , Figure 4 This is a partial structural schematic diagram of the induction hardening equipment 100 for shaft parts provided in this embodiment, combined with... Figure 4 The rotary clamping device 20 includes a first motor 21, a second motor 22, a first clamping member 23, and a second clamping member (not shown in the figure). The first motor 21 and the second motor 22 are respectively disposed on opposite side walls of the housing 10. The first clamping member 23 is connected to the first motor 21, and the second clamping member is connected to the second motor 22. The first clamping member 23 and the second clamping member are both located inside the housing 10 and are used to clamp the two ends of the shaft workpiece 001, respectively.

[0058] By setting the first motor 21 and the second motor 22 to drive the first clamping member 23 and the second clamping member to rotate respectively, so as to simultaneously drive the shaft workpiece 001 to be clamped, it can be understood as a dual-side drive clamping method, which can provide a more stable rotational torque for the shaft workpiece 001, and is conducive to reducing the additional vibration and deformation tendency caused by unstable rotation.

[0059] It should be noted that in this embodiment, both the first clamping member 23 and the second clamping member are three-jaw chucks, which facilitate the installation and removal of the shaft workpiece 001 and provide good clamping stability. Of course, in other embodiments, the first clamping member 23 and the second clamping member can also adopt other types of clamping structures.

[0060] Please refer to Figure 5 and Figure 6 , Figure 5 This is a first-view assembly diagram of the axial feed device 30 and the induction hardening device 40 provided in this embodiment. Figure 6 This is a second-view assembly diagram of the axial feed device 30 and the induction hardening device 40 provided in this embodiment, combined with... Figures 4-6 The axial feed device 30 includes a support plate 31, a first mounting plate 32, a second mounting plate (not shown in the figure), a lead screw 33, a ball nut 34, a slider 35, a slide rail 36, and a third motor (not shown in the figure).

[0061] Specifically, the support plate 31 is fixed to the inner wall of the housing 10. The first mounting plate 32 and the second mounting plate are respectively disposed at both ends of the support plate 31. The two ends of the lead screw 33 are rotatably connected to the first mounting plate 32 and the second mounting plate, respectively. The third motor is disposed on the first mounting plate 32 or the second mounting plate and is connected to the lead screw 33 for transmission. The slide rail 36 is disposed on the support plate 31 and is located between the first mounting plate 32 and the second mounting plate. The ball nut 34 is threadedly engaged with the lead screw 33, and the slider 35 is disposed on the ball nut 34 and is slidably engaged with it. The induction hardening device 40 and the support ring frame 51 are both connected to the slider 35. That is to say, by driving the lead screw 33 to rotate through the third motor, the ball nut 34 drives the slider 35 to slide on the slide rail 36, thereby realizing the synchronous movement of the induction hardening device 40 and the support ring frame 51.

[0062] To facilitate the connection between the support ring frame 51 and the slider 35 and improve their installation stability, in this embodiment, the axial feed device 30 further includes a bearing plate 38 and a second fastener 39. One end of the bearing plate 38 is fixedly connected to the slider 35 via the second fastener 39, and the other end of the bearing plate 38 is connected to the support ring frame 51. Figure 2 and Figure 5Specifically, in this embodiment, the rotating shaft 514 is disposed at the end of the bearing plate 38 away from the slider 35, and the rotating shaft 514 passes through the first arc frame 511 and the second arc frame 512.

[0063] Furthermore, in order to improve the sliding stability between the slider 35 and the slide rail 36, the axial feed device 30 also includes a guide block 37, which is slidably disposed on the slide rail 36, and the side of the guide block 37 away from the slide rail 36 is connected to the slider.

[0064] Please continue to combine Figure 5 and Figure 6 Specifically, the induction hardening device 40 includes a power supply 41, an induction coil 42, and a magnetic conductor 43. The power supply 41 is located on top of the sliding block. The induction coil 42 is electrically connected to the power supply 41 and is positioned on the outer periphery of the shaft workpiece 001. The magnetic conductor 43 is sleeved on the induction coil 42. It is understood that the magnetic conductor 43 drives the alternating magnetic field towards the surface of the shaft workpiece 001, thereby improving heating efficiency and reducing energy loss.

[0065] Combination Figure 1 and Figure 4 To recycle the coolant used in the machining process of the shaft workpiece 001, the induction hardening equipment 100 for shaft parts also includes a drain pipe 91 and a liquid receiving box 92. The drain pipe 91 is located at the bottom of the housing 10, and the liquid receiving box 92 is located on one side of the housing 10. The liquid receiving box 92 has wheels (not shown) at its bottom and an opening 921 at its top. One end of the drain pipe 91 passes through the side wall of the housing 10 and is located at the opening 921.

[0066] The liquid receiving box 92 is used to receive the coolant collected at the bottom of the housing 10 and can be pushed to a centralized treatment or circulation filtration station. This mobile liquid receiving box 92 design replaces the fixed trench or pipeline structure in the prior art, making coolant recovery more flexible, convenient for maintenance and cleaning, and also reducing the requirements of the equipment on the plant foundation.

[0067] In addition, in this embodiment, the housing 10 is provided with an observation port 11 and a movable door 12. There are two movable doors 12. The movable doors 12 are used to open or close the observation port 11. On the one hand, it is convenient to observe the quenching of shaft parts and ensure the safety of the quenching process. On the other hand, it is also convenient to inspect and maintain the relevant devices inside the housing 10 later.

[0068] In summary, embodiments of the present invention provide an induction hardening apparatus 100 for shaft parts. The induction hardening apparatus 100 includes a housing 10, a rotary clamping device 20, an axial feed device 30, an induction hardening device 40, a straightening device 50, and a controller 60. The rotary clamping device 20 is disposed within the housing 10 and is used to clamp the shaft workpiece 001 and drive the shaft workpiece 001 to rotate. The axial feed device 30 is disposed within the housing 10 and is used to move relative to the housing 10 along the axial direction of the shaft workpiece 001. The induction hardening device 40 is disposed on the axial feed device 30 and is used to perform induction hardening on the shaft workpiece 001. The straightening device 50 includes a support ring frame 51, a bending deformation detection sensor 52, and a straightening component 53. The support ring frame 51 is disposed on the axial feed device 30 and is used for the shaft workpiece 001 to pass through. The bending deformation detection sensor 52 is disposed on the support ring frame 51 and is used to detect the radial runout of the shaft workpiece 001. The straightening component 53 is disposed on the support ring frame 51 and is used to apply a straightening force to the shaft workpiece 001. The controller 60 is electrically connected to both the bending deformation detection sensor 52 and the straightening component 53 and is used to control the straightening component 53 to apply a straightening force to the shaft workpiece 001 when the radial runout is greater than a preset runout.

[0069] By mounting both the induction hardening device 40 and the straightening device 50 on the axial feed device 30, they can move synchronously with the axial feed device 30. This allows for simultaneous detection and correction of the radial runout of the shaft workpiece 001 during induction hardening. Specifically, the bending deformation detection sensor 52 monitors the radial runout of the shaft workpiece 001 in real time during the hardening process. If the radial runout exceeds a preset amount, it indicates that the shaft workpiece 001 has begun to bend. At this point, the controller 60 controls the straightening component 53 to apply a straightening force to the shaft workpiece 001 to prevent bending deformation. This process provides reverse intervention at the initial stage of bending deformation, thereby continuously suppressing the bending tendency of the shaft workpiece 001 during the dynamic process of quenching heating and cooling. This ensures a uniform gap between the shaft workpiece 001 and the induction hardening device 40, guaranteeing circumferential consistency during quenching heating and cooling, and thus improving the hardening quality of shaft parts.

[0070] The above description is merely a specific embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An induction hardening device for shaft-type parts, characterized in that, include: Casing (10); A rotary clamping device (20) is disposed in the housing (10) and is used to clamp the shaft workpiece (001) and drive the shaft workpiece (001) to rotate; An axial feed device (30) is disposed inside the housing (10) and is used to move relative to the housing (10) along the axial direction of the workpiece (001). An induction hardening device (40) is provided on the axial feed device (30) and is used to perform induction hardening on the shaft workpiece (001). A straightening device (50) includes a support ring frame (51), a bending deformation detection sensor (52), and a straightening assembly (53). The support ring frame (51) is disposed on the axial feed device (30) and is used for the shaft workpiece (001) to pass through. The bending deformation detection sensor (52) is disposed on the support ring frame (51) and is used to detect the radial runout of the shaft workpiece (001). The straightening assembly (53) is disposed on the support ring frame (51) and is used to apply a straightening force to the shaft workpiece (001). as well as The controller (60) is electrically connected to both the bending deformation detection sensor (52) and the correction component (53), and is used to control the correction component (53) to apply a correction force to the shaft workpiece (001) when the radial runout is greater than a preset runout.

2. The induction hardening equipment for shaft parts according to claim 1, characterized in that, The straightening assembly (53) includes a first drive member (531) and a straightening roller (532). The first drive member (531) is disposed on the support ring frame (51). The straightening roller (532) is connected to the first drive member (531) and is used to make rolling contact with the surface of the shaft workpiece (001). The controller (60) is electrically connected to the first drive member (531).

3. The induction hardening equipment for shaft parts according to claim 2, characterized in that, The outer periphery of the straightening roller (532) is provided with an arc-shaped groove, which is used to make rolling contact with the surface of the shaft workpiece (001), and the curvature of the arc-shaped groove is the same as the surface curvature of the shaft workpiece (001).

4. The induction hardening equipment for shaft parts according to claim 1, characterized in that, The number of the correction components (53) is multiple, and the multiple correction components (53) are arranged at circumferential intervals along the support ring frame (51). The controller (60) is electrically connected to the multiple correction components (53) simultaneously. When the radial runout is greater than the preset runout, the controller (60) controls the straightening component (53) corresponding to the bending direction of the shaft workpiece (001) to apply a straightening force to the shaft workpiece (001).

5. The induction hardening equipment for shaft parts according to claim 1, characterized in that, The support ring frame (51) includes a first arc frame (511) and a second arc frame (512). One end of the first arc frame (511) is hinged to one end of the second arc frame (512), and the other end of the first arc frame (511) is detachably connected to the other end of the second arc frame (512). The axial feed device (30) is connected to the second arc frame (512) and is located near the hinge between the second arc frame (512) and the first arc frame (511). The first arc frame (511) is provided with at least one bending deformation detection sensor (52) and at least one correction component (53), and the second arc frame (512) is provided with at least one bending deformation detection sensor (52) and at least one correction component (53).

6. The induction hardening equipment for shaft parts according to claim 1, characterized in that, The induction hardening equipment (100) for shaft parts further includes a first coolant nozzle (71) and a first coolant pipe (72). The first coolant nozzle (71) is disposed on the support ring frame (51) and is used to spray coolant toward the shaft workpiece (001). The first coolant pipe (72) is connected to the first coolant nozzle (71).

7. The induction hardening equipment for shaft parts according to claim 1, characterized in that, The induction hardening equipment (100) for shaft parts further includes a spraying device (80), which is disposed inside the housing (10). The spraying device (80) includes a fixed plate (81), a lifting plate (82), a second driving member (83), a second coolant nozzle (84), and a second coolant pipe (85). The fixed plate (81) is fixed to the inner wall of the housing (10), and the lifting plate (82) is spaced apart from the fixed plate (81). The fixed end of the second driving member (83) is connected to the fixed plate (81), and the movable end of the second driving member (83) is connected to the lifting plate (82). The second coolant nozzle (84) is disposed on the lifting plate (82), and the second coolant pipe (85) is connected to the second coolant nozzle (84).

8. The induction hardening equipment for shaft parts according to claim 1, characterized in that, The rotary clamping device (20) includes a first motor (21), a second motor (22), a first clamping member (23), and a second clamping member. The first motor (21) and the second motor (22) are respectively disposed on opposite side walls of the housing (10). The first clamping member (23) is connected to the first motor (21), and the second clamping member is connected to the second motor (22). The first clamping member (23) and the second clamping member are both located inside the housing (10) and are respectively used to clamp the two ends of the shaft workpiece (001).

9. The induction hardening equipment for shaft parts according to claim 1, characterized in that, The axial feed device (30) includes a support plate (31), a first mounting plate (32), a second mounting plate, a lead screw (33), a ball nut (34), a slider (35), a slide rail (36), and a third motor; The support plate (31) is fixed to the inner wall of the housing (10). The first mounting plate (32) and the second mounting plate are respectively disposed at both ends of the support plate (31). The two ends of the lead screw (33) are rotatably connected to the first mounting plate (32) and the second mounting plate, respectively. The third motor is disposed on the first mounting plate (32) or the second mounting plate and is connected to the lead screw (33) for transmission. The slide rail (36) is disposed on the support plate (31) and is located between the first mounting plate (32) and the second mounting plate. The ball nut (34) is threadedly engaged with the lead screw (33). The slider (35) is disposed on the ball nut (34) and is slidably engaged with the slide rail (36). The induction hardening device (40) and the support ring frame (51) are both connected to the slider (35).

10. The induction hardening equipment for shaft parts according to claim 1, characterized in that, The induction hardening equipment (100) for shaft parts also includes a drain pipe (91) and a liquid receiving box (92). The drain pipe (91) is located at the bottom of the housing (10), and the liquid receiving box (92) is located on one side of the housing (10). The liquid receiving box (92) has wheels at the bottom and an opening (921) at the top; one end of the drain pipe (91) passes through the side wall of the housing (10) and is located at the opening (921).

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