Wheel hub temperature measuring device, wheel hub heating device and temperature measuring method thereof

Abstract

The application relates to the technical field of hub processing, in particular to a hub temperature measuring device, a hub heating device and a temperature measuring method thereof. The hub temperature measuring device comprises a fixing seat used for fixedly connecting with a target platform, a driving device fixedly connected with the fixing seat, a positioning seat movably connected with the fixing seat and fixedly connected with an output shaft of the driving device, so as to be close to or far away from a to-be-measured hub located on the target platform, the positioning seat is provided with an opening gradually expanding along the axial direction of the output shaft, the opening is used for accommodating and positioning the to-be-measured hub, and a temperature measuring probe is telescopically arranged on the side wall of the positioning seat forming the opening and used for measuring the surface temperature of the rim of the to-be-measured hub. The application can be used for positioning and temperature measurement of to-be-measured hubs with different sizes, is accurate and reliable in positioning, has a wide application range, and is simple in structure, low in cost and high in measurement efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hub processing, in particular to a hub temperature measuring device, a hub heating device and a temperature measuring method thereof. BACKGROUND

[0002] The hub is an important component of the vehicle tire, and its manufacturing process directly affects the performance and safety of the vehicle. In the hub manufacturing process, the spinning process is a commonly used forming process, which processes the casting blank of the target temperature through the spinning equipment, so that the rim of the hub is transformed into a metal processing technology with a specific geometric shape, and a hub with complex shape, lightweight and strong durability can be manufactured. Compared with the traditional casting or molding process, the spinning process can reduce material waste and energy consumption, improve production efficiency and product quality. The hub heating treatment before spinning has a crucial influence on product quality.

[0003] At present, the hub size is various, and the fixed temperature measuring probe of the hub induction heating device cannot be suitable for the temperature of different sizes of hubs, and multiple fixed temperature measuring probes need to be redesigned, which is high in cost and low in measurement efficiency. SUMMARY

[0004] The present application provides a hub temperature measuring device, a hub heating device and a temperature measuring method thereof, which can position and measure the temperature of different sizes of hubs to be measured, and is accurate and reliable in positioning, wide in application range, simple in structure, low in cost and high in measurement efficiency.

[0005] In a first aspect, the present application provides a hub temperature measuring device, comprising: a fixed seat for fixed connection with a target platform; a driving device fixedly connected with the fixed seat; a positioning seat movably connected with the fixed seat and fixedly connected with the output shaft of the driving device to approach or move away from the hub to be measured located on the target platform, the positioning seat having an opening gradually expanding in the axial direction of the output shaft, the opening being used for accommodating and positioning the hub to be measured; and a temperature measuring probe telescopically arranged on the side wall of the positioning seat forming the opening, used for measuring the surface temperature of the rim of the hub to be measured.

[0006] In a possible implementation, the side wall of the positioning seat forming the opening includes a first side wall and a second side wall arranged at a preset angle, and the number of temperature measuring probes is multiple, at least two temperature measuring probes are arranged on the first side wall and the second side wall respectively, so as to serve as high-temperature temperature measuring points and low-temperature temperature measuring points for monitoring the surface temperature of the rim of the hub to be measured respectively.

[0007] In a possible implementation, the positioning seat comprises a base plate and a first support part and a second support part arranged on the base plate, the base plate is movably connected with the fixing seat and fixedly connected with the output shaft of the driving device, the first support part and the second support part are oppositely and spacedly arranged, the first side wall is formed on the first support part, and the second side wall is formed on the second support part.

[0008] In a possible implementation, the positioning seat further comprises two guide rails and two sliding blocks slidably connected with the two guide rails respectively, the guide rails are fixedly connected with the base plate, and the two sliding blocks are fixedly connected with the first support part and the second support part respectively, so that the first support part and the second support part are movably arranged relative to the center of the base plate.

[0009] In a possible implementation, the first support part and the second support part are both hollow right triangular prisms, the first side wall and the second side wall are both inclined surfaces of the right triangular prisms, one right angle edge of the right triangular prism coincides with the base plate, and the other right angle edge is arranged perpendicularly to the base plate.

[0010] In a possible implementation, the wheel hub temperature measuring device further comprises a nut and a compression spring, one end of the temperature measuring probe is provided with an annular step and a temperature measuring probe arranged on the annular step, the other end of the temperature measuring probe is sequentially arranged through the compression spring and the side wall and is threadedly connected with the nut, so that the compression spring is arranged between the annular step and the side wall.

[0011] In a possible implementation, the wheel hub temperature measuring device further comprises a guide assembly arranged parallel to the output shaft of the driving device, the guide assembly comprises a linear bearing and a guide rod, the linear bearing is arranged on the fixing seat, the guide rod is arranged through the linear bearing, and one end of the guide rod is connected with the positioning seat.

[0012] In a possible implementation, the heating platform comprises a fixing frame, a pressing assembly and a heating assembly, the heating assembly comprises a rotating disc rotatable relative to the fixing frame and a permanent magnet assembly arranged on the rotating disc, the permanent magnet assembly comprises a plurality of first permanent magnets and a plurality of second permanent magnets alternately and spacedly arranged along the circumference of the rotating disc, the polarities of adjacent first permanent magnets and second permanent magnets are opposite, the pressing assembly moves relative to the fixing frame along the axial direction of the rotating disc, the wheel hub to be measured is arranged on the pressing assembly and can be pressed on the wheel hub to be measured, and the rim of the wheel hub to be measured is arranged between the permanent magnet assembly; the wheel hub temperature measuring device is arranged on one side of the heating assembly, and the temperature measuring probe is driven by the driving device to measure the surface temperature of the rim of the wheel hub to be measured.

[0013] In a third aspect, the application further provides a temperature measurement method of a wheel hub heating device, which is applied to the wheel hub heating device. The heating platform of the wheel hub heating device comprises a rotating disc rotatable relative to a fixed frame and a permanent magnet assembly arranged on the rotating disc, and the rim of a wheel hub to be measured is arranged between the permanent magnet assembly. The temperature measurement method comprises the following steps: determining a first structure of the permanent magnet assembly and a first rotating speed-time curve thereof according to a wheel hub heating temperature-time curve and geometric dimensions and material information of the wheel hub to be measured, wherein the first structure at least comprises the dimensions, arrangement mode and magnetic field distribution of a plurality of first permanent magnets and a plurality of second permanent magnets in the permanent magnet assembly; determining a simulation heating model of the first structure according to the first structure and the corresponding first rotating speed-time curve, determining a first high-temperature measurement point, a first low-temperature measurement point and a first theoretical temperature-time curve of the rim of the wheel hub to be measured based on the simulation heating model, and the first theoretical temperature-time curve comprises a theoretical temperature-time curve of the first high-temperature measurement point and a theoretical temperature-time curve of the first low-temperature measurement point; iteratively optimizing the first structure according to the first theoretical temperature-time curve and the wheel hub heating temperature-time curve to obtain a second structure of the permanent magnet assembly and a second rotating speed-time curve thereof; determining a simulation heating model of the second structure according to the second structure and the second rotating speed-time curve, determining a second high-temperature measurement point, a second low-temperature measurement point and a second theoretical temperature-time curve of the rim of the wheel hub to be measured based on the simulation heating model, and the shape of the second theoretical temperature-time curve tends to be close to the shape of the wheel hub heating temperature-time curve; constructing a test prototype according to the simulation heating model of the second structure, measuring a second actual temperature-time curve of the second high-temperature measurement point and the second low-temperature measurement point through a wheel hub temperature measurement device according to the test prototype and the second rotating speed-time curve; iteratively optimizing the second high-temperature measurement point and the second low-temperature measurement point according to the second theoretical temperature-time curve and the second actual temperature-time curve to determine a third high-temperature measurement point, a third low-temperature measurement point and a third theoretical temperature-time curve, and the shape of the third theoretical temperature-time curve remains consistent with the shape of the wheel hub heating temperature-time curve; measuring a third actual temperature-time curve of the third high-temperature measurement point and the third low-temperature measurement point according to the second rotating speed-time curve; fine-tuning the second rotating speed-time curve according to the third theoretical temperature-time curve and the third actual temperature-time curve until the third actual temperature-time curve remains consistent with the third theoretical temperature-time curve, wherein the third high-temperature measurement point and the third low-temperature measurement point are respectively the best high-temperature measurement point and the best low-temperature measurement point of the rim of the wheel hub to be measured, and the fine-tuned second rotating speed-time curve is a best rotating speed-time curve corresponding to the best structure of the permanent magnet assembly.

[0014] In a possible implementation, the number of the first high-temperature temperature measuring points and the number of the first low-temperature temperature measuring points are both plural, and the first theoretical temperature-time curve is obtained by denoising the theoretical temperature-time curves of the plural first high-temperature temperature measuring points and the theoretical temperature-time curves of the plural first low-temperature temperature measuring points; and / or, the second high-temperature temperature measuring point is at most two second high-temperature temperature measuring points that are further denoised from the first high-temperature temperature measuring points after denoising, according to the theoretical temperature-time curves of the plural second high-temperature temperature measuring points; and / or, the second low-temperature temperature measuring point is at most two second low-temperature temperature measuring points that are further denoised from the first low-temperature temperature measuring points after denoising, according to the theoretical temperature-time curves of the plural second low-temperature temperature measuring points.

[0015] According to the hub temperature measuring device, the hub heating device and the temperature measuring method provided in the embodiments of the present application, the opening gradually expanding along the axial direction of the output shaft of the driving device is arranged on the positioning seat, so that the hub to be measured of different sizes can be accommodated and automatically positioned, and the retractable temperature measuring probe is arranged on the side wall of the positioning seat forming the opening, which is used to measure the surface temperature of the rim of the hub to be measured. The problems of difficult positioning of the hub to be measured and variable temperature measuring conditions of the hub to be measured can be solved, so that the positioning and temperature measuring of the hub to be measured can be integrated, the positioning is accurate and reliable, the application range is wide, and the structure is simple, the cost is low, and the measurement efficiency is high. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the specific embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0017] Figure 1 The three-dimensional structural schematic diagram of the hub temperature measuring device provided in the embodiments of the present application is shown in the drawings.

[0018] Figure 2 The three-dimensional structural schematic diagram of the hub temperature measuring device provided in the embodiments of the present application is shown in the drawings. Figure 1 The structural schematic diagram of the hub temperature measuring device shown in the drawings along one angle is shown in the drawings.

[0019] Figure 3 The structural schematic diagram of the hub temperature measuring device shown in the drawings along another angle is shown in the drawings. Figure 1 The structural schematic diagram of the hub temperature measuring device shown in the drawings along another angle is shown in the drawings.

[0020] Figure 4 The three-dimensional structural schematic diagram of the hub heating device provided in the embodiments of the present application is shown in the drawings.

[0021] Figure 5 The electrical structural schematic diagram of the hub heating device provided in the embodiments of the present application is shown in the drawings.

[0022] Figure 6 A flow chart of a temperature measurement method of a hub heating device is provided in the embodiments of the present application.

[0023] The reference signs are explained as follows:

[0024] 1000, hub heating device; 100, hub temperature measurement device; 200, heating platform; 210, fixing frame; 220, compression assembly; 230, heating assembly; W, hub to be measured;

[0025] 1, fixing seat; 11, first fixing plate; 12, second fixing plate; 2, driving device; 21, output shaft;

[0026] 3, positioning seat; 30, opening; 31, first side wall; 32, second side wall; 33, base plate; 34, first support part; 35, second support part;

[0027] 4, temperature measurement probe; 41, annular step; 42, temperature measurement probe head; 43, nut; 44, compression spring; 5, guide assembly; 51, linear bearing; 52, guide rod. DETAILED DESCRIPTION

[0028] The technical solutions of the present application will be described clearly and completely in combination with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0029] Figure 1 A perspective structural schematic diagram of a hub temperature measurement device is provided in the embodiments of the present application.

[0030] As shown in Figure 1 , the embodiments of the present application provide a hub temperature measurement device 100, which comprises a fixing seat 1, a driving device 2, a positioning seat 3 and a temperature measurement probe 4.

[0031] The fixing seat 1 is used for fixed connection with a target platform, the driving device 2 is fixedly connected with the fixing seat 1, the positioning seat 3 is movably connected with the fixing seat 1 and fixedly connected with an output shaft 21 of the driving device 2, so as to be close to or away from a hub W to be measured located on the target platform, the positioning seat 3 has an opening 30 which is gradually expanded along the axial direction of the output shaft 21 and is used for accommodating and positioning the hub W to be measured. The temperature measurement probe 4 is telescopically arranged on the side wall of the positioning seat 3 forming the opening 30, and is used for measuring the surface temperature of the rim of the hub W to be measured.

[0032] In this embodiment, the hub W to be tested is taken out after being manufactured from a casting furnace, and the surface temperature of the rim thereof is generally above 300 DEG C, which is related to the standing time after the hub W to be tested is taken out. The temperature required for spinning the rim of the hub W to be tested is generally 350 DEG C ± 30 DEG C. If the surface temperature of the rim of the hub W to be tested is less than the temperature required for spinning the rim of the hub W to be tested, the rim of the hub W to be tested needs to be heated by the hub heating device, and then the subsequent spinning process is performed. In this process, the hub temperature measuring device 100 is used to measure the surface temperature of the rim of the hub W to be tested in real time.

[0033] Specifically, the fixed seat 1 of the hub temperature measuring device 100 includes a first fixed plate 11 and a second fixed plate 12 which are arranged to intersect, and the second fixed plate 12 is used to be fixedly connected with a target platform, which can be a heating platform of the hub heating device. The first fixed plate 11 is fixedly connected with a driving device 2, the output shaft 21 of the driving device 2 penetrates through the first fixed plate 11, and the output shaft 21 is fixedly connected with a positioning seat 3. The positioning seat 3 is movably connected with the first fixed plate 11, and the output shaft 21 of the driving device 2 drives the positioning seat 3 to move linearly to approach or move away from the hub W to be tested located on the target platform.

[0034] The positioning seat 3 is provided with an opening 30 which is arranged to gradually expand along the axial direction of the output shaft 21. The side wall of the positioning seat 3 which forms the opening 30 can be a horn-shaped structure which is arranged to gradually expand in a whole circle, or can be a wall portion which is arranged to gradually expand locally. The opening 30 which is arranged to gradually expand has a self-centering effect, can accommodate and automatically position the hub W to be tested with different sizes, and the side wall of the positioning seat 3 which forms the opening 30 is provided with a telescopic temperature measuring probe 4. When the hub W to be tested contacts the opening 30 of the positioning seat 3, the outer surface of the rim of the hub W to be tested extrudes the temperature measuring probe 4 on the side wall which forms the opening 30, so that the temperature measuring probe 4 is compressed and pre-tightened. In this way, it can be ensured that the temperature measuring probe 4 is always in good contact with the outer circumferential surface of the rim of the hub W to be tested, so that the compression amount of the temperature measuring probe 4 can be adaptively adjusted for the hub W to be tested with different sizes, so that the temperature measuring probe 4 can contact the surface of the rim of the hub W to be tested with different sizes to realize temperature measurement, meet the temperature measurement requirements of the hub W to be tested with various models, and have a wide range of applications.

[0035] According to the hub temperature measuring device 100 provided in the present application, the opening 30 which is arranged to gradually expand along the axial direction of the output shaft of the driving device 2 is arranged on the positioning seat 3, so that the hub W to be tested with different sizes can be accommodated and automatically positioned. Meanwhile, the telescopic temperature measuring probe 4 is arranged on the side wall of the positioning seat 3 which forms the opening 30, and is used to measure the surface temperature of the rim of the hub W to be tested. The problems of difficult positioning of the hub W to be tested and variable temperature measurement working conditions of the hub W to be tested can be solved, so that the positioning and temperature measurement of the hub W to be tested can be integrated, the positioning is accurate and reliable, the range of application is wide, and the structure is simple, the cost is low, and the measurement efficiency is high.

[0036] Figure 2 As shown in FIG. 1, the wheel hub temperature measuring device 100 comprises a fixed seat 1, a driving device 2, a positioning seat 3 and a temperature measuring probe 4. Figure 1 As shown in FIG. 2, a structural schematic view of the wheel hub temperature measuring device along one angle is shown. Figure 3 As shown in FIG. 3, a structural schematic view of the wheel hub temperature measuring device along another angle is shown. Figure 1 As shown in FIG. 2, a structural schematic view of the wheel hub temperature measuring device along one angle is shown.

[0037] In some embodiments, the side wall of the positioning seat 3 forming the opening 30 comprises a first side wall 31 and a second side wall 32 arranged at a preset angle, and the number of the temperature measuring probes 4 is multiple, and at least two temperature measuring probes 4 are arranged on the first side wall 31 and the second side wall 32 respectively, so as to serve as high-temperature temperature measuring points and low-temperature temperature measuring points for monitoring the surface temperature of the rim of the wheel hub W.

[0038] As shown in FIG. 2 and FIG. 3, the opening 30 of the positioning seat 3 is arranged in a gradually expanding V shape along the axial direction of the output shaft 21, and the side wall forming the opening 30 comprises a first side wall 31 and a second side wall 32 arranged at a preset angle, and the size of the preset angle is related to the arrangement order of the permanent magnet assembly in the wheel hub heating device, which will be described in detail later. Figure 2 Figure 3 As shown in FIG. 2 and FIG. 3, the opening 30 of the positioning seat 3 is arranged in a gradually expanding V shape along the axial direction of the output shaft 21, and the side wall forming the opening 30 comprises a first side wall 31 and a second side wall 32 arranged at a preset angle, and the size of the preset angle is related to the arrangement order of the permanent magnet assembly in the wheel hub heating device, which will be described in detail later.

[0039] Optionally, at least two temperature measuring probes 4 are arranged on the first side wall 31 and the second side wall 32 respectively. Two or more temperature measuring probes 4 can be located in the same plane or in different planes, and the two or more temperature measuring probes 4 on the first side wall 31 serve as high-temperature temperature measuring points for monitoring the surface temperature of the wheel hub W, and the two or more temperature measuring probes 4 on the second side wall 32 serve as low-temperature temperature measuring points for monitoring the surface temperature of the rim of the wheel hub W.

[0040] Since the wheel hub temperature measuring device 100 can simultaneously monitor the temperature of the high-temperature temperature measuring points and the temperature of the low-temperature temperature measuring points of the rim of the wheel hub W, and compare the two groups of temperature data, on the one hand, it can ensure that the heating temperature of the surface of the rim of the wheel hub W is relatively uniform, and the temperature difference is within the design range, and on the other hand, it can ensure that the surface temperature of the rim of the wheel hub W to be monitored is more accurate and has higher reliability.

[0041] In some embodiments, the positioning seat 3 comprises a base plate 33, a first support part 34 and a second support part 35 arranged on the base plate 33, the base plate 33 is movably connected with the fixed seat 1 and fixedly connected with the output shaft 21 of the driving device 2, the first support part 34 and the second support part 35 are oppositely and spacedly arranged, the first side wall 31 is formed on the first support part 34, and the second side wall 32 is formed on the second support part 35.

[0042] ​As shown in Figure 2 and Figure 3 The positioning seat 3 comprises a base plate 33, a first support part 34 and a second support part 35, the first support part 34 and the second support part 35 are oppositely and spacedly arranged, and the structures of the two can be any shape as long as the first side wall 31 is formed on the first support part 34, the second side wall 32 is formed on the second support part 35, and the first side wall 31 and the second side wall 32 are arranged at a preset angle, which is simple in structure and easy to manufacture.

[0043] In some embodiments, the first support part 34 and the second support part 35 are movably arranged relative to the center of the base plate 33. In this way, on the one hand, the two groups of temperature measuring probes 4 can always monitor the temperature at the high temperature and the temperature at the low temperature of the hub W to be measured respectively; on the other hand, the size of the opening 30 can be adjusted, which is suitable for more different sizes of the hub W to be measured, and meets the temperature measurement requirements of more types of the hub W to be measured, and has a wider range of application.

[0044] In some embodiments, the positioning seat 3 further comprises two guide rails and two sliding blocks respectively slidably connected with the two guide rails, the guide rails are fixedly connected with the base plate 33, and the two sliding blocks are fixedly connected with the first support part 34 and the second support part 35 respectively.

[0045] In this embodiment, by arranging the guide rail and sliding block structure between the base plate 33 and the first support part 34 or the second support part 35 of the positioning seat 3, the first support part 34 and the second support part 35 can be movably arranged relative to the center of the base plate 33, and then the first side wall 31 and the second side wall 32 can be relatively close or far away, so that the size of the opening 30 can be adaptively adjusted according to the size of the hub W to be measured of various types, which is convenient to operate and has a wider range of application.

[0046] In some embodiments, the first support part 34 and the second support part 35 are both hollow right triangular prisms, the first side wall 31 and the second side wall 32 are both inclined surfaces of the right triangular prisms, one right angle edge of the right triangular prism coincides with the base plate 33, and the other right angle edge is arranged perpendicular to the base plate 33.

[0047] As shown in Figures 1 to 3 The first support part 34 and the second support part 35 are both hollow right triangular prisms, which reduces the weight of the first support part 34 and the second support part 35 while improving the structural strength and rigidity of the first support part 34 and the second support part 35. The first side wall 31 and the second side wall 32 are both inclined surfaces of the right triangular prisms, which are oppositely and spacedly arranged and arranged at a preset angle therebetween, thereby simplifying the structure of the first support part 34 and the second support part 35 and facilitating the manufacturing.

[0048] In some embodiments, the wheel hub temperature measuring device 100 further comprises a nut 43 and a compression spring 44, one end of the temperature measuring probe 4 is provided with an annular step 41 and a temperature measuring probe 42 located on the annular step 41, the other end of the temperature measuring probe 4 is sequentially provided with the compression spring 44 and the side wall, and is threadedly connected with the nut 43, so that the compression spring 44 is located between the annular step 41 and the side wall.

[0049] As shown in Figure 2 , the temperature measuring probe 4 is telescopically arranged by the compression spring 44 located between the annular step 41 and the first side wall 31 or between the annular step 41 and the second side wall 32, so that the compression amount of the temperature measuring probe 4 can be adaptively adjusted for different sizes of the to-be-measured wheel hub W, so that the temperature measuring probe 4 can be in contact with the surface of the rim of the wheel hub W of different sizes to realize temperature measurement, meet the temperature measurement requirements of various models of the to-be-measured wheel hub W, and have a wide range of applications.

[0050] In some embodiments, the wheel hub temperature measuring device 100 further comprises a guide assembly 5, which is arranged between the fixed seat 1 and the positioning seat 3 and parallel to the output shaft 21 of the driving device 2.

[0051] As shown in Figure 2 and Figure 3 , the guide assembly 5 is provided with two, which are arranged between the first fixed plate 11 of the fixed seat 1 and the first support part 34 of the positioning seat 3 and between the first fixed plate 11 and the second support part 35, and are arranged parallel to the output shaft 21 of the driving device 2, the guide assembly 5 is used for assisting the output shaft 21 of the driving device 2 to drive the positioning seat 3 to move linearly, preventing the positioning seat 3 from being stuck due to uneven force, assembly error and the like during linear motion, and improving the stability and accuracy of the positioning seat 3 during linear motion.

[0052] In some embodiments, the guide assembly 5 comprises a linear bearing 51 and a guide rod 52, the linear bearing 51 is arranged on the fixed seat 1, and the guide rod 52 penetrates the linear bearing 51 and one end of the guide rod 52 is connected with the positioning seat 3.

[0053] As shown in Figure 3 , the guide assembly 5 comprises a linear bearing 51 and a guide rod 52, the first fixed plate 11 of the fixed seat 1 is provided with a through hole, the linear bearing 51 is connected with the through hole in interference, one end of the guide rod 52 penetrates the linear bearing 51, the other end of the guide rod 52 is provided with a flange plate, and the flange plate is fixedly connected with the base plate 33 of the positioning seat 3. The cooperation of the linear bearing 51 and the guide rod 52 can reduce the friction of the guide assembly 5 assisting the output shaft 21 of the driving device 2 to drive the positioning seat 3 to move linearly, and further improve the stability and accuracy of the positioning seat 3 during linear motion.

[0054] Figure 4A three-dimensional structural schematic diagram of a wheel hub heating device provided by an embodiment of the present application, Figure 5 An electrical structural schematic diagram of a wheel hub heating device provided by an embodiment of the present application.

[0055] As Figure 4 shown, an embodiment of the present application provides a wheel hub heating device 1000, which comprises a heating platform 200 and a wheel hub temperature measuring device 100 of an embodiment of the present application.

[0056] The heating platform 200 is used to carry and heat a to-be-measured wheel hub W, the wheel hub temperature measuring device 100 is fixedly connected with the heating platform 200 through a fixing seat 1, a positioning seat 3 is driven by a driving device 2 to approach or move away from the to-be-measured wheel hub W, and a temperature measuring probe 4 is used to measure the surface temperature of the rim of the to-be-measured wheel hub W.

[0057] In some embodiments, the heating platform 200 comprises a fixing frame 210, a pressing assembly 220 and a heating assembly 230, the heating assembly 230 comprises a rotating disc rotatable relative to the fixing frame 210 and a permanent magnet assembly arranged on the rotating disc, the permanent magnet assembly comprises a plurality of first permanent magnets and a plurality of second permanent magnets alternately and spaced apart along the circumference of the rotating disc, the polarities of adjacent first permanent magnets and second permanent magnets are opposite, the pressing assembly 220 moves relative to the fixing frame 210 along the axial direction of the rotating disc and can press the to-be-measured wheel hub W, so that the rim of the to-be-measured wheel hub W is arranged between the permanent magnet assemblies; the wheel hub temperature measuring device 100 is arranged on one side of the heating assembly 230, and the temperature measuring probe 4 is driven by the driving device 2 to measure the surface temperature of the rim of the to-be-measured wheel hub W.

[0058] The heating assembly 230 further comprises a rotating motor and a transmission and speed reduction assembly, which are used to drive the rotating disc to rotate, thereby driving the permanent magnet assembly to rotate. When the rim of the to-be-measured wheel hub W is heated, the to-be-measured wheel hub W is fixedly arranged on the side of the pressing assembly 220 close to the heating assembly 230, the pressing assembly 220 moves downward relative to the fixing frame 210 and close to the heating assembly 230, until the rim of the to-be-measured wheel hub W is accommodated between the permanent magnet assemblies of the heating assembly 230; the rotating disc is rotated, the permanent magnet assembly on the rotating disc rotates with the rotating disc, so that the first permanent magnets and the second permanent magnets with opposite polarities generate an alternating magnetic field on the surface of the rim of the to-be-measured wheel hub W, the surface of the rim of the to-be-measured wheel hub W generates heat under the action of the alternating magnetic field and heats up, so that the surface temperature of the rim of the to-be-measured wheel hub W can be quickly and uniformly heated to a target temperature; after heating is completed, the pressing assembly 220 drives the to-be-measured wheel hub W to move upward relative to the fixing frame 210 to move away from the heating assembly 230; the to-be-measured wheel hub W is removed, and a mechanical hand is used to transport the to-be-measured wheel hub W to a spinning device for subsequent spinning process.

[0059] As Figure 5As shown, the wheel hub temperature measuring device 100 includes not only the temperature probe 4, but also temperature transmitters, filter capacitors, filter resistors, PLC control systems, and other temperature measuring components.

[0060] During the heating process of the wheel hub W to be tested by the wheel hub heating equipment 1000, the temperature measuring probe 4 of the wheel hub temperature measuring device 100 contacts the surface of the wheel rim W. Due to the increase in the temperature of the wheel rim, the temperature measuring probe 4 generates a small voltage signal, which is then transmitted to the temperature transmitter. The temperature transmitter converts the voltage signal into a temperature signal, and the filter capacitor and filter resistor are used to filter out interference signals in the voltage signal. The temperature signal generated by the temperature transmitter is transmitted to the PLC control system. According to the wheel hub heating process parameters, the PLC control system sets the wheel hub heating temperature curve (empirical curve) in the PLC control system. The PLC control system outputs signals to control the rotation of the heating components (including the start, acceleration, and deceleration of the rotary motor) in the wheel hub heating equipment 1000. The rotary motor can drive the permanent magnet assembly to rotate, thereby controlling the heating and heat preservation conditions of the wheel rim surface.

[0061] It should be noted that the wheel hub heating process parameters are the process parameters required for the next process, namely the wheel hub spinning process. These process parameters require the wheel hub heating equipment 1000 to heat the wheel hub W under test according to a determined wheel hub heating temperature curve. There is a one-to-one correspondence between this wheel hub heating temperature curve and the rotational characteristics of the rotary motor, and between the rotational characteristics of the rotary motor and the heating temperature of the surface of the wheel hub W under test (or the heating, heat preservation, and other working conditions of the surface of the wheel hub W under test). The following describes the temperature measurement method of the wheel hub heating equipment provided in this application embodiment, based on the simulation design data and actual experimental data of the permanent magnet assembly in the wheel hub heating equipment 1000 heating the wheel hub W under test.

[0062] Figure 6 A flowchart illustrating the temperature measurement method of the wheel hub heating device provided in this application embodiment.

[0063] like Figure 6 As shown, this application embodiment provides a temperature measurement method for a wheel hub heating device, applied to the wheel hub heating device 1000 of this application embodiment. The heating platform 200 of the wheel hub heating device 1000 includes a turntable rotatable relative to the fixed frame 210 and a permanent magnet assembly disposed on the turntable. The rim of the wheel hub W to be measured is disposed between the permanent magnet assemblies.

[0064] The temperature measurement method of the wheel hub heating device in this application includes the following steps S1 to S8.

[0065] Step S1: According to the wheel hub heating temperature-time curve and the geometric size and material information of the to-be-tested wheel hub W, determine the first structure of the permanent magnet assembly and the first rotation speed-time curve thereof, the first structure at least including the size, arrangement and magnetic field distribution of the plurality of first permanent magnets and the plurality of second permanent magnets in the permanent magnet assembly;

[0066] Step S2: According to the first structure and the corresponding first rotation speed-time curve, determine the simulation heating model of the first structure, and determine the first high-temperature measuring point, the first low-temperature measuring point and the first theoretical temperature-time curve of the rim of the to-be-tested wheel hub W based on the simulation heating model, the first theoretical temperature-time curve including the theoretical temperature-time curve of the first high-temperature measuring point and the theoretical temperature-time curve of the first low-temperature measuring point;

[0067] Step S3: According to the first theoretical temperature-time curve and the wheel hub heating temperature-time curve, iteratively optimize the first structure to obtain the second structure of the permanent magnet assembly and the second rotation speed-time curve thereof;

[0068] Step S4: According to the second structure and the second rotation speed-time curve, determine the simulation heating model of the second structure, and determine the second high-temperature measuring point, the second low-temperature measuring point and the second theoretical temperature-time curve of the rim of the to-be-tested wheel hub W based on the simulation heating model, the shape of the second theoretical temperature-time curve tending to the shape of the wheel hub heating temperature-time curve;

[0069] Step S5: According to the simulation heating model of the second structure, construct a test prototype, and according to the test prototype and the second rotation speed-time curve, measure the second actual temperature-time curve of the second high-temperature measuring point and the second low-temperature measuring point by the wheel hub temperature measuring device 100;

[0070] Step S6: According to the second theoretical temperature-time curve and the second actual temperature-time curve, iteratively optimize the second high-temperature measuring point and the second low-temperature measuring point to determine the third high-temperature measuring point and the third low-temperature measuring point and the third theoretical temperature-time curve, and the shape of the third theoretical temperature-time curve is consistent with the shape of the wheel hub heating temperature-time curve;

[0071] Step S7: According to the second rotation speed-time curve, measure the third actual temperature-time curve of the third high-temperature measuring point and the third low-temperature measuring point;

[0072] Step S8: According to the third theoretical temperature-time curve and the third measured temperature-time curve, the second rotating speed-time curve is fine-tuned until the third measured temperature-time curve is substantially consistent with the third theoretical temperature-time curve, wherein the third high-temperature measuring point and the third low-temperature measuring point are the optimal high-temperature measuring point and the optimal low-temperature measuring point of the rim of the wheel hub W to be measured, respectively, and the fine-tuned second rotating speed-time curve is the optimal rotating speed-time curve corresponding to the optimal structure of the permanent magnet assembly. The optimal structure of the permanent magnet assembly can include, for example but not limited to, a preset angle of the V-shaped opening 30 of the positioning seat 3, which is related to the arrangement of the permanent magnet assembly in the wheel hub heating device 1000.

[0073] In some embodiments, the number of the first high-temperature measuring points and the number of the first low-temperature measuring points are both plural, and the first theoretical temperature-time curve is obtained by denoising the theoretical temperature-time curves of the plural first high-temperature measuring points and the theoretical temperature-time curves of the plural first low-temperature measuring points. Here, “denoising” means that the measuring points that are obviously quite different from the wheel hub heating temperature-time curve are removed from the theoretical temperature-time curves of the plural first high-temperature measuring points or the theoretical temperature-time curves of the plural first low-temperature measuring points, so as to reduce the number of measuring points and the amount of data analysis, i.e., to optimize the measuring points. The specific denoising method can adopt the currently more mature denoising methods, such as filter-based methods (mean filtering, median filtering, Gaussian filtering, adaptive Wiener filtering), model-based methods (partial differential equation method, variational method), and learning-based methods (non-local mean algorithm, block matching 3D filtering), etc.

[0074] In some embodiments, the second high-temperature measuring point is at most two second high-temperature measuring points that are further denoised from the denoised first high-temperature measuring points based on the theoretical temperature-time curves of the plural second high-temperature measuring points, and the second low-temperature measuring point is at most two second low-temperature measuring points that are further denoised from the denoised first low-temperature measuring points based on the theoretical temperature-time curves of the plural second low-temperature measuring points.

[0075] Here, “denoising” means that the measuring points that are obviously quite different from the wheel hub heating temperature-time curve are removed from the theoretical temperature-time curves of the plural second high-temperature measuring points or the theoretical temperature-time curves of the plural second low-temperature measuring points, so as to reduce the number of measuring points and the amount of data analysis, i.e., to optimize the measuring points. The specific denoising method can refer to any one of the foregoing various methods, and will not be described herein again.

[0076] According to the temperature measurement method of the hub heating device provided in the embodiment of the present application, the temperature of the high-temperature measurement point and the temperature of the low-temperature measurement point of the rim of the hub W to be measured can be monitored simultaneously, and the two groups of temperature data are compared, which can ensure that the heating temperature of the surface of the rim of the hub W to be measured is relatively uniform, the temperature difference is within the design range, and on the other hand, the surface temperature of the rim of the hub W to be measured is more accurate and has higher reliability.

[0077] It should be noted that the phrases "one embodiment", "an embodiment", "certain embodiments", "some embodiments", and the like, as used in the specification, indicate that the embodiment(s) so described can include a particular feature, structure, or characteristic, but not every embodiment necessarily includes the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of those skilled in the art to effect such feature, structure, or characteristic in connection with other

[0078] It will be readily understood that the terms "on", "above", and "on top of", in the present disclosure, are to be interpreted in the broadest context, such that "on" means not only "directly on", but also "on" with intervening features or layers therebetween, and "above" or "on top of" means not only "above" or "on top of", but also "above" or "on top of" with no intervening features or layers therebetween (i.e., directly on).

[0079] In addition, spatially relative terms, such as "beneath", "below", "lower", "above", "upper" and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. The spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. The devices can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0080] It should be noted that, in the present document, relational terms such as "first" and "second", and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0081] Finally, it should be noted that the above-described embodiments are merely intended for describing and illustrating, not limiting, the technical solutions of the present application; even though the present application has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the above embodiments, or equivalently replace some or all of the technical features thereof; and such modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A temperature measuring method for a wheel hub heating apparatus, characterized by: The heating platform is used for carrying and heating the to-be-tested hub, the hub temperature measuring device is fixedly connected with the heating platform through a fixing seat, the positioning seat is driven by a driving device to approach or move away from the to-be-tested hub, and a temperature measuring probe is used for measuring the surface temperature of the rim of the to-be-tested hub; The heating platform comprises a fixing frame, a pressing assembly, a heating assembly, a rotating disc rotatable relative to the fixing frame and a permanent magnet assembly arranged on the rotating disc, the rim of the to-be-tested hub is arranged between the permanent magnet assemblies, the heating assembly comprises a rotating disc rotatable relative to the fixing frame and a permanent magnet assembly arranged on the rotating disc, the permanent magnet assembly comprises a plurality of first permanent magnets and a plurality of second permanent magnets alternately and spaced apart along the circumference of the rotating disc, the polarities of the adjacent first permanent magnets and the second permanent magnets are opposite, the pressing assembly moves relative to the fixing frame along the axial direction of the rotating disc and can be pressed on the to-be-tested hub so that the rim of the to-be-tested hub is arranged between the permanent magnet assemblies; The hub temperature measuring device is arranged on one side of the heating assembly, and the temperature measuring probe is driven by the driving device to measure the surface temperature of the rim of the to-be-tested hub; The hub temperature measuring device comprises: a fixing seat for fixedly connecting with the heating platform; a driving device fixedly connected with the fixing seat; a positioning seat movably connected with the fixing seat and fixedly connected with the output shaft of the driving device to approach or move away from the to-be-tested hub on the heating platform, the positioning seat has an opening gradually expanding along the axial direction of the output shaft, and the opening is used for accommodating and positioning the to-be-tested hub; and a temperature measuring probe telescopically arranged on the side wall of the positioning seat forming the opening and used for measuring the surface temperature of the rim of the to-be-tested hub; The temperature measuring method comprises: determining a first structure of the permanent magnet assembly and a first rotation speed time curve thereof according to a hub heating temperature time curve and geometric size and material information of the to-be-tested hub, the first structure at least comprising the size, arrangement mode and magnetic field distribution of the plurality of first permanent magnets and the plurality of second permanent magnets in the permanent magnet assembly; determining a simulation heating model of the first structure according to the first structure and the corresponding first rotation speed time curve, determining a first high-temperature measuring point, a first low-temperature measuring point and a first theoretical temperature time curve of the rim of the to-be-tested hub based on the simulation heating model, the first theoretical temperature time curve comprising a theoretical temperature time curve of the first high-temperature measuring point and a theoretical temperature time curve of the first low-temperature measuring point; iteratively optimizing the first structure according to the first theoretical temperature time curve and the hub heating temperature time curve to obtain a second structure of the permanent magnet assembly and a second rotation speed time curve thereof. According to the second structure and the second rotation speed-time curve, a simulation heating model of the second structure is determined, and a second high-temperature temperature measuring point, a second low-temperature temperature measuring point and a second theoretical temperature-time curve of the rim of the hub to be tested are determined based on the simulation heating model, and the shape of the second theoretical temperature-time curve tends to be close to the shape of the hub heating temperature-time curve; According to the simulation heating model of the second structure, a test prototype is constructed, and a second measured temperature-time curve of the second high-temperature temperature measuring point and the second low-temperature temperature measuring point is measured by the hub temperature measuring device according to the test prototype and the second rotation speed-time curve; According to the second theoretical temperature-time curve and the second measured temperature-time curve, the second high-temperature temperature measuring point and the second low-temperature temperature measuring point are iteratively optimized to determine a third high-temperature temperature measuring point and a third low-temperature temperature measuring point and a third theoretical temperature-time curve, and the shape of the third theoretical temperature-time curve is consistent with the shape of the hub heating temperature-time curve; According to the second rotation speed-time curve, a third measured temperature-time curve of the third high-temperature temperature measuring point and the third low-temperature temperature measuring point is measured; According to the third theoretical temperature-time curve and the third measured temperature-time curve, the second rotation speed-time curve is fine-tuned until the third measured temperature-time curve is substantially consistent with the third theoretical temperature-time curve, wherein the third high-temperature temperature measuring point and the third low-temperature temperature measuring point are the best high-temperature temperature measuring point and the best low-temperature temperature measuring point of the rim of the hub to be tested, and the fine-tuned second rotation speed-time curve is the best rotation speed-time curve corresponding to the best structure of the permanent magnet assembly.

2. The temperature measurement method according to claim 1, wherein The number of the first high-temperature temperature measuring points and the number of the first low-temperature temperature measuring points are multiple, and the first theoretical temperature-time curve is obtained by denoising a plurality of theoretical temperature-time curves of the first high-temperature temperature measuring points and a plurality of theoretical temperature-time curves of the first low-temperature temperature measuring points; And / or, the second high-temperature temperature measuring point is at most two second high-temperature temperature measuring points that are further denoised based on a plurality of theoretical temperature-time curves of the second high-temperature temperature measuring points on the basis of the denoised first high-temperature temperature measuring points, and the second low-temperature temperature measuring point is at most two second low-temperature temperature measuring points that are further denoised based on a plurality of theoretical temperature-time curves of the second low-temperature temperature measuring points on the basis of the denoised first low-temperature temperature measuring points.

3. The temperature measurement method according to claim 1, wherein The side wall of the positioning seat forming the opening comprises a first side wall and a second side wall arranged at a preset angle, the number of the temperature measuring probes is multiple, and at least two temperature measuring probes are arranged on the first side wall and the second side wall respectively to serve as high-temperature temperature measuring points and low-temperature temperature measuring points for monitoring the surface temperature of the rim of the hub to be tested.

4. The temperature measurement method according to claim 3, wherein The positioning seat comprises a base plate, a first supporting part and a second supporting part arranged on the base plate, the base plate is movably connected with the fixing seat and fixedly connected with the output shaft of the driving device, the first supporting part and the second supporting part are oppositely and spacedly arranged, the first side wall is formed on the first supporting part, and the second side wall is formed on the second supporting part.

5. The temperature measurement method according to claim 4, wherein The positioning seat further comprises two guide rails and two sliding blocks slidably connected with the two guide rails respectively, the guide rails are fixedly connected with the base plate, and the two sliding blocks are fixedly connected with the first supporting part and the second supporting part respectively, so that the first supporting part and the second supporting part are movably arranged relative to the center of the base plate.

6. The temperature measurement method according to claim 5, wherein The first supporting part and the second supporting part are both hollow right triangular prisms, the first side wall and the second side wall are both inclined surfaces of the right triangular prisms, one right angle edge of the right triangular prisms coincides with the base plate, and the other right angle edge is arranged perpendicularly to the base plate.

7. The temperature measurement method according to any one of claims 3 to 6, characterized in that, The temperature measuring probe further comprises a nut and a compression spring, one end of the temperature measuring probe is provided with an annular step and a temperature measuring probe arranged on the annular step, the other end of the temperature measuring probe is sequentially arranged through the compression spring and the side wall, and is threadedly connected with the nut, so that the compression spring is arranged between the annular step and the side wall.

8. The temperature measurement method according to any one of claims 3 to 6, characterized in that, The temperature measuring probe further comprises a guide assembly arranged parallel to the output shaft of the driving device, the guide assembly comprises a linear bearing and a guide rod, the linear bearing is arranged on the fixing seat, the guide rod is arranged through the linear bearing, and one end of the guide rod is connected with the positioning seat.

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