Sensor induced eddy current collection device

Abstract

The invention discloses an inductor induced eddy current collection device, which belongs to the field of quenching technology. In order to solve the problems of a long entire verification cycle, increased processing costs, low processing efficiency, and being unfavorable to the production needs of gear quenching, the device comprises a bottom plate and at least one vertically arranged coil fixing part, the top surface of the bottom plate is slidably provided with a coil fixing part through a sliding connection part; the coil fixing part comprises a back plate and a pressure plate, one side plate surface of the back plate is detachably connected to the pressure plate, a card slot group is provided on the butt joint surface of the back plate and the pressure plate, the card slot group comprises a plurality of card slots arranged in parallel, a signal collection coil is carded in the card slot, two ends of the signal collection coil are respectively connected to a signal collection plug through a shielded wire penetrating the outer wall of the back plate, and the signal collection plug is fixedly connected to the outer wall of the back plate; the signal collection plug is connected to a multi-channel signal collector through a shielded wire.

Description

Technical Field

[0001] The invention relates to the technical field of induction quenching, and in particular to an inductor induced eddy current collection device. Background Art

[0002] The induction heating quenching methods of gears include full tooth quenching, tooth package quenching, and continuous heating surface quenching along the tooth groove. Among them, the continuous heating surface quenching method along the tooth groove has the best quality. The specific operation method of continuous heating surface quenching along the tooth groove is to place the induction conductor of the inductor in the tooth groove of the gear. The induction conductor is designed as an involute imitating the tooth shape. The matching surfaces of the induction conductor and the tooth groove are the tip end face and the two side end faces, wherein the tip end face is opposite to the tooth root of the tooth groove and the shape matches, and the side end face of the induction conductor is opposite to the tooth surface of the tooth groove and the shape matches The spacing between the inductive conductor and the tooth slot is a determined value between 1mm and 1.8mm. Then, the power of the power supply is adjusted to send an alternating current of a certain frequency into the inductor, so that an alternating magnetic field is generated around the tooth slot. The alternating magnetic field penetrates into the surface of the tooth slot and extends inwardly. Corresponding eddy current is generated inside the tooth slot in the penetration area. The eddy current quickly quenches and heats the surface of the tooth slot, and the eddy current gradually decreases from the surface of the tooth slot to the inner layer. By controlling the heating time, a hardened layer depth consistent with the penetration depth of the eddy current is generated on the surface of the tooth slot.

[0003] During the induction heating quenching process of gears, the current frequency, power supply power, heating time and spacing are the main quenching parameters. When the heating time and spacing are constant, the quenching parameters that determine the quenching effect of the gear to be quenched are mainly the current frequency and power supply power. The higher the current frequency, the smaller the eddy current penetration depth and the shallower the hardened layer depth. The higher the power supply power, the greater the eddy current penetration depth and the deeper the hardened layer depth.

[0004] For each type of gear, before induction heating quenching, the quenching parameters need to be determined according to the required hardened layer depth. However, since it is currently impossible to directly obtain the eddy current values ​​and distribution at different depths under the corresponding quenching parameters, it is also impossible to know the hardened layer depth based on the eddy current penetration depth. Therefore, the only way to find the appropriate quenching parameters is through several sample tests. The specific sample test process is as follows: first, several gear samples are processed, and then the current frequency and power value of the quenching parameters are adjusted to conduct quenching tests on the gear samples. Finally, the microhardness gradient method is used to determine the effective hardened layer depth and surface hardness of the gear samples. According to the measurement results, the quenching parameters that meet the hardened layer thickness requirements are determined.

[0005] Since there are hundreds of gear models, and the requirements for the hardened layer depth of each model also need to be adjusted according to production, more than 7 groups of sample tests are required to determine the quenching parameters that meet the hardened layer depth requirements. Only then can the final quenching parameters be determined. The entire process requires the cooperation of multiple people, manual data recording, and a long verification cycle, which increases the processing cost of the gears, seriously affects the production progress, and is not conducive to the production needs of gear quenching. Summary of the invention

[0006] The purpose of the present invention is to provide an inductor induced eddy current collection device to solve the problems of long entire verification cycle, increased processing cost, low processing efficiency and being unfavorable to the production requirements of gear quenching.

[0007] The present invention is implemented by the following technical scheme: an inductor induced eddy current collection device comprises a bottom plate and at least one vertically arranged coil fixing part, the top surface of the bottom plate is slidably provided with the coil fixing part through a sliding connection part;

[0008] The coil fixing part includes a back plate and a pressure plate, one side plate surface of the back plate is detachably connected to the pressure plate, a slot group is provided on the mating surface of the back plate and the pressure plate, the slot group includes a plurality of parallel slots, a signal acquisition coil is clamped in the slot, two ends of the signal acquisition coil are respectively connected to the signal acquisition plug through the outer wall of the back plate through shielded wires, and the signal acquisition plug is fixedly connected to the outer wall of the back plate; the signal acquisition plug is connected to the multi-channel signal collector through the shielded wire.

[0009] Furthermore, at least one cooling channel group is provided in the back plate, each cooling channel group includes a plurality of parallel cooling channels, the plane where each cooling channel group is located is parallel to the plane where the slot group is located, and both ends of the cooling channel respectively penetrate the plate surface of the back plate.

[0010] Furthermore, an air cap is provided at the inlet end of the cooling channel group, the air cap is fixedly connected to the back plate, a cooling medium inlet is provided on the outer wall of the air cap, and the interior of the air cap is connected to the interior of the cooling channel.

[0011] Furthermore, the sliding connection member includes a slide groove, a slider and a support frame. The slide groove is opened on the top surface of the base plate, and the slider is slidably arranged in the slide groove. The slider is fixedly connected to the bottom outer wall of the coil fixing member through the support frame.

[0012] Furthermore, there are three coil fixings, namely a tip coil fixing and two side coil fixings. The cross-section of the tip coil fixing is arc-shaped. The side coil fixings are separately provided on both sides of the tip coil fixing. The area enclosed by the tip coil fixing and the two side coil fixings matches the shape of the inducing conductor.

[0013] Furthermore, the card slot and the cooling channel of the tip coil fixing piece are both vertically arranged, a shielding pad is clamped between the top end of the tip coil fixing piece and the air cap, the shielding pad is provided with a through hole matching the cooling channel, the cooling channel is connected with the interior of the air cap through the through hole, a through groove connected with the outside is horizontally provided on the bottom end surface of the shielding pad, the through groove is connected with the card slot, and the shielding wire is connected with the signal acquisition plug via the through groove.

[0014] Furthermore, the slot of the side coil fixing piece is arranged horizontally, and the cooling channel is arranged vertically.

[0015] Furthermore, at least one angle adjustment device is provided between the side coil fixing part and the base plate, and the angle adjustment device includes a first adjustment seat, a first adjustment screw, a first adjustment nut, two fixing plates, and a guide rod. The first adjustment seat is fixedly connected to the top end of the base plate, the first adjustment seat is provided with a first through hole, and a horizontally arranged first adjusting screw is movably passed through the first through hole, one end of the first adjusting screw is threaded with the first adjusting nut, the first adjusting nut is rotatably connected to the first adjustment seat, and the other end of the first adjusting screw is fixed with a vertically arranged guide rod, and the two ends of the guide rod are respectively provided with the horizontally arranged fixing plates, and the fixing plates are fixedly connected to the outer wall of the side coil fixing part, and a limiting groove is provided in the middle of the fixing plate, and the two ends of the guide rod are respectively slidably arranged in the two limiting grooves.

[0016] Furthermore, a front-to-rear adjustment device is fixed to the outer wall of the tip coil fixing piece, and the front-to-rear adjustment device includes a second adjustment seat, a second adjustment screw, and a second adjustment nut. A second through hole is opened on the second adjustment seat, and a horizontally arranged second adjustment screw is movably inserted into the second through hole. A second adjustment nut is threadedly connected to one end of the second adjustment screw, and the second adjustment nut is rotatably connected to the second adjustment seat, and the other end of the second adjustment screw is fixedly connected to the tip coil fixing piece.

[0017] Furthermore, a sliding frame is provided on the bottom surface of the base plate through track sliding, a guide groove is opened in the middle of the sliding frame, a screw rod is provided in the guide groove, one end of the screw rod movably passes through the outer wall of the sliding frame and is screwed to a rotating nut, the rotating nut is rotatably connected to the sliding frame, and the other end of the screw rod is fixedly connected to the base plate through a connecting plate.

[0018] The advantages of the present invention are as follows: the device collects and analyzes eddy currents to determine the theoretical eddy current penetration depth. When determining the actual hardened layer depth in the early stage, it is necessary to test the gear sample, and obtain a corresponding relationship based on the theoretical eddy current penetration depth and the actual hardened layer depth. In the later stage, the hardened layer depth required for other types of gears only needs to be substituted into the corresponding relationship. When the eddy current is collected by the device to meet the theoretical eddy current penetration depth, the quenching parameters at this time are the corresponding processing parameters. When determining the corresponding relationship in the early stage, the processing cost of the gear sample needs to be invested. After determining the corresponding relationship, other types of gears of the same material can directly bring the required actual hardened layer depth into the corresponding relationship to determine the theoretical eddy current penetration depth. Then, the device is used to determine the quenching parameters based on the determined theoretical eddy current penetration depth, which greatly reduces the processing cost of the gear and ensures the work efficiency. One person can complete the entire quenching parameter determination process.

[0019] Under the action of the cooling medium in the cooling channel, the back plate and the signal acquisition coil are cooled down, thereby extending the service life of the back plate and the signal acquisition coil;

[0020] By using the side coil fixings and the tip coil fixings, with the cooperation of the signal acquisition coil and the multi-channel signal collector, the uniformity of the theoretical eddy current penetration depth and the actual hardened layer depth of the tooth surface and tooth root of the tooth slot under the same quenching parameters can be verified. If the hardened layer depth is uneven, the angle of the side coil fixing is adjusted by the angle adjustment device, and the distance between the side coil fixing and the side end face of the inductive conductor is fine-tuned. The front and rear adjustment device is used to fine-tune the front and rear position of the tip coil fixing, and the distance between the tip coil fixing and the tip end face of the inductive conductor is fine-tuned. By adjusting the distance between the inductive conductor and the tip coil fixing or the two side coil fixings, the hardened layer depth of the tooth surface and tooth root of the tooth slot is consistent and the surface hardness is uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a stereogram of Example 1 of the invention;

[0023] Figure 2 It is a bottom view of Example 1 of the invention;

[0024] Figure 3 It is a schematic structural diagram of the back plate, air cap and slider of the coil fixing member in Example 1 of the invention;

[0025] Figure 4 It is a partial cross-sectional view of the back plate, the air cap and the slider of the coil fixing member in Example 1 of the invention;

[0026] Figure 5 for Figure 3 A partial enlarged view of middle A;

[0027] Figure 6 A stereogram of Example 2 of the invention

[0028] Figure 7 A three-dimensional diagram of the tip coil fixing member, the air cap, the slider and the second adjusting screw of Example 2 of the invention;

[0029] Figure 8 A top view of a tip coil fixing member of Example 2 of the invention;

[0030] Fig. 9 It is a schematic diagram of the structure of the shielding pad of Example 2 of the invention;

[0031] Fig.10 This is a schematic diagram of the use status of Example 2 of the invention;

[0032] Fig.11 for Figure 6 A partial enlarged view of middle A;

[0033] Fig.12 for Figure 6 A partial enlarged view of B in the middle;

[0034] In the figure: bottom plate 1, coil fixing part 2, back plate 2.1, pressure plate 2.2, sliding connection part 3, slide groove 3.1, slide block 3.2, support frame 3.3, card slot group 4, card slot 4.1, signal acquisition coil 5, shielding wire 6, signal acquisition plug 7, cooling channel group 8, cooling channel 8.1, air cap 9, cooling medium inlet 10, track 11, sliding frame 12, guide groove 13, screw rod 14, rotating nut 15, connecting plate 16, multi-channel signal collector 1 7. Tip coil fixing part 18, side coil fixing part 19, shielding pad 20, through hole 20.1, through slot 20.2, angle adjustment device 21, first adjustment seat 21.1, first adjustment screw 21.2, first adjustment nut 21.3, fixing plate 21.4, limit slot 21.4.1, guide rod 21.5, front and rear adjustment device 22, second adjustment seat 22.1, second adjustment screw 22.2, second adjustment nut 22.3, induction conductor 23. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Embodiment 1:

[0037] like Figure 1-5 As shown, the inductor induced eddy current collection device includes a base plate 1 and at least one vertically arranged coil fixing part 2. The top surface of the base plate 1 is slidably provided with the coil fixing part 2 through a sliding connection part 3. In this embodiment, there is one coil fixing part 2. Specifically, in this embodiment, the coil fixing part 2 matches one of the side end surfaces of the sensing conductor 23 and is parallel to each other. During operation, the sensing conductor 23 is placed on the top surface of the base plate 1, close to the coil fixing part 2. The initial spacing between the coil fixing part 2 and the sensing conductor 23 is the spacing between the gear to be quenched and the sensing conductor 23 during the actual quenching process.

[0038] The coil fixing member 2 includes a back plate 2.1 and a pressure plate 2.2. One side of the back plate 2.1 is detachably connected to the pressure plate 2.2. The specific detachable connection method is bolt connection, card connection, and plug-in connection. The butt joint surface of the back plate 2.1 and the pressure plate 2.2 is provided with a card slot group 4. The card slot group 4 includes a plurality of parallel card slots 4.1. A signal acquisition coil 5 is carded in the card slot 4.1. The signal acquisition coil 5 is used to collect the eddy current value and distribution of the position of the coil fixing member 2 in the alternating magnetic field. The pressure plate 2.2 and the back plate 2.1 The signal acquisition coil 5 is fixed under the joint action of the shielded wire 6. The signal acquisition plug 7 is connected to the signal acquisition plug 7 through the shielded wire 6 passing through the outer wall of the back plate 2.1. The signal acquisition plug 7 is fixedly connected to the outer wall of the back plate 2.1. The signal acquisition plug 7 is connected to the multi-channel signal collector 17 through the shielded wire 6. All real-time collected data are stored in the multi-channel signal collector 17, which is convenient for data analysis or copying.

[0039] The shielding wire 6 is mainly a wire with a shielding layer wrapped around the outer wall of the signal wire, and the purpose is to solve the problem that the signal wire causes the signal acquisition coil 5 to collect inaccurate data under the interference of the alternating magnetic field;

[0040] Preferably, except for the signal acquisition coil 5, the shielding wire 6 and the signal acquisition plug 7, all other components used in the device are made of insulating materials, in order to prevent other components from interfering with the signal acquisition coil 5 in the alternating magnetic field.

[0041] The sliding connection 3 includes a slide groove 3.1, a slider 3.2 and a support frame 3.3. The slider 3.2 is cylindrical in shape, which is convenient for the coil fixing part 2 to rotate. A slide groove 3.1 is opened on the top surface of the bottom plate 1. A slider 3.2 is slidably arranged in the slide groove 3.1. The slider 3.2 is fixedly connected to the outer wall of the bottom end of the coil fixing part 2 through the support frame 3.3. The slide groove 3.1 and the slider 3.2 ensure that the signal acquisition coil 5 moves stably on the bottom plate 1. With the cooperation of the sliding connection 3, the operator manually fine-tunes the distance between the coil fixing part 2 and the inductive conductor 23, and the distance is adjusted from small to large. The coil fixing part 2 is moved in the alternating magnetic field, and the theoretical eddy current penetration depth is determined by the attenuation of the eddy current collected by the signal acquisition coil 5.

[0042] At least one cooling channel group 8 is provided in the back plate 2.1, and each cooling channel group 8 includes a plurality of cooling channels 8.1 arranged in parallel. The plane where each cooling channel group 8 is located is parallel to the plane where the card slot group 4 is located. The two ends of the cooling channel 8.1 respectively penetrate the plate surface of the back plate 2.1. The temperature of the signal acquisition coil 5 will increase in the alternating magnetic field. The cooling channel 8.1 is utilized to cool the back plate 2.1 and the signal acquisition coil 5, thereby reducing the acquisition error caused by the increase in the temperature of the signal acquisition coil 5 and ensuring the consistency of the entire acquisition process.

[0043] An air cap 9 is provided at the inlet end of the cooling channel 8.1 group, and the air cap 9 is fixedly connected to the back plate 2.1. A cooling medium inlet 10 is provided on the outer wall of the air cap 9. The interior of the air cap 9 is connected with the interior of the cooling channel 8.1. The cooling medium is cooling air. The cooling air enters the cooling channel 8.1 through the cooling medium inlet 10, and then is directly discharged through the outlet end of the cooling channel 8.1, so as to cool the back plate 2.1 and the signal acquisition coil 5 and extend the service life of the back plate 2.1 and the signal acquisition coil 5.

[0044] The bottom surface of the base plate 1 is provided with a sliding frame 12 which slides through a track 11. The sliding frame 12 is fixed on the machine tool to ensure the stability of the collection process. The track 11 is used to ensure that the sliding frame 12 and the base plate 1 slide against each other. A guide groove 13 is provided in the middle of the sliding frame 12. A screw rod 14 is provided in the guide groove 13. One end of the screw rod 14 movably penetrates the outer wall of the sliding frame 12 and is screwed to a rotating nut 15. The rotating nut 15 is rotatably connected to the sliding frame 12. The other end of the screw rod 14 is fixedly connected to the base plate 1 through a connecting plate 16. With the cooperation of the screw rod 14 and the rotating nut 15, the screw rod 14 moves back and forth along the guide groove 13, driving the base plate 1 to move along the sliding frame 12, and adjusting the distance between the device and the inducing conductor 23.

[0045] The signal acquisition coil 5 of the coil fixture 2 collects the eddy current value, and transmits the eddy current to the multi-channel signal collector 17 through the shielded wire 6. The theoretical eddy current penetration depth is determined according to the movement distance of the coil fixture 2 in the alternating magnetic field and the attenuation of the eddy current; then the theoretical eddy current penetration depth and the actual hardened layer depth of the gear sample are subjected to least squares regression analysis by using Minitab to simulate the corresponding relationship between the theoretical eddy current penetration depth and the actual hardened layer depth, and the attenuation coefficient of gears of different materials is determined; according to the range of hardened layer depth required for the gear to be quenched, the theoretical eddy current penetration depth can be determined by the above corresponding relationship; the device is used to move the coil fixture 2, and by setting multiple sets of quenching parameters, when the coil When the eddy current detected by the fixing part 2 is attenuated and the moving distance is just the theoretical eddy current penetration depth, the corresponding quenching parameters meet the quenching requirements of the gear to be quenched, that is, the process of determining the quenching parameters is mainly completed by detecting the eddy current by the device. Therefore, it is only when the attenuation coefficient is determined in the early stage that the processing cost of the gear sample needs to be invested. After determining the attenuation coefficient, other types of gears of the same material can directly bring the required actual hardened layer depth into the corresponding relationship to determine the theoretical eddy current penetration depth, and then use the device to determine the quenching parameters based on the determined theoretical eddy current penetration depth, which will greatly reduce the processing cost of the gear while ensuring work efficiency. One person can complete the entire quenching parameter determination process.

[0046] The specific operation method of this embodiment is as follows:

[0047] 1. Fix the sliding frame 12 on the operating platform, which is equipped with a sensor. By adjusting the rotating nut 15, the screw rod 14 moves, driving the bottom plate 1 to move toward the sensing conductor 23 of the sensor until the coil fixing part 2 is close to the sensing conductor 23;

[0048] By cooperating with the slide groove 3.1 and the slider 3.2 of the sliding connector 3, the coil fixing member 2 is manually and stably moved to ensure that the end faces of the coil fixing member 2 and the induction conductor 23 are parallel to each other;

[0049] 2. Determine the corresponding relationship between the theoretical eddy current penetration depth h and the actual hardened layer depth H;

[0050] 2.1. Setting multiple groups of different quenching parameters, the heating time and the initial spacing L between the coil fixture 2 and the induction conductor 23 of each group of quenching parameters are the same, while the current frequency and power supply power are variables;

[0051] 2.2. Obtaining the theoretical eddy current penetration depth: Under each set of quenching parameters, first, the coil fixture 2 collects the eddy current I at the initial spacing L, and then the coil fixture 2 moves in a direction away from the inducing conductor 23. During the movement, the signal collection coil 5 of the coil fixture 2 is used to collect the eddy current, and the shielded wire 6 is used to transmit the eddy current to the multi-channel signal collector 17. All real-time collected data are stored in the multi-channel signal collector 17. When the coil fixture 2 moves to a certain distance, the eddy current collected by the multi-channel signal collector 17 at this time is attenuated to 36.8% compared with the eddy current collected by the coil fixture 2 at the initial spacing L. According to the definition of the current penetration depth, it can be known that the moving distance is the theoretical eddy current penetration depth h value under this set of parameters;

[0052] 2.3. Obtaining the actual hardened layer depth: Under each set of quenching parameters, a gear sample is used for quenching test. The spacing between the tooth groove of the gear and the inductive conductor 23 is the same as the initial spacing L between the coil fixing part 2 and the inductive conductor 23. The quenching process is completed in the same heating time. The actual hardened layer depth H value of the gear sample is determined by the microhardness gradient method.

[0053] 2.4. Through the above experiments, each set of quenching parameters corresponds to the theoretical eddy current penetration depth h and the actual hardened layer depth H, as shown in Table 1 below:

[0054] Table 1

[0055]

[0056] Due to the influence of gear material, the actual hardened layer depth H of the gear deviates from the theoretical eddy current penetration depth h. The actual hardened layer depth H is less than the theoretical eddy current penetration depth h. Therefore, the least squares regression analysis is implemented using Minitab to simulate the corresponding relationship between the theoretical eddy current penetration depth h and the actual hardened layer depth H.

[0057] 3. Determination of quenching parameters of the gear to be quenched:

[0058] As long as the actual hardened layer depth H´n required for the gear to be quenched is given, the specific theoretical eddy current penetration depth h´n can be determined through the above corresponding relationship;

[0059] According to the theoretical eddy current penetration depth h'n, by adjusting the current frequency and power value, the coil fixture is moved from the initial spacing L to the direction away from the inducing conductor 23 by the distance of the theoretical eddy current penetration depth h'n under each set of quenching parameters. When the eddy current value collected by the signal acquisition coil 5 is reduced to 36.8% of the maximum eddy current intensity on the surface, the current frequency and power value of this set are the quenching parameters of the gear to be quenched, as shown in Table 2 below:

[0060] Table 2

[0061]

[0062] Under the nth group of quenching parameters, the eddy current collected by the coil fixing member 5 at the initial spacing L is I´n, and then the coil fixing member 5 moves h´n in the direction away from the inducing conductor 23. At this time, when the eddy current I"n collected by the signal acquisition coil 5 is 36.8%I´n, the quenching parameters of this group are the quenching parameters of the gear to be quenched.

[0063] 4. When the gear to be quenched is quenched, the distance between the gear to be quenched and the inductive conductor 23 is set to the initial distance L between the coil fixing part 2 and the inductive conductor 23. The quenching process can be performed using the quenching parameters determined in step 3.

[0064] Embodiment 2:

[0065] like Figure 3-12 As shown, the difference between Example 2 and Example 1 is that there are three coil fixing members 2, namely a tip coil fixing member 18 and two side coil fixing members 19. The cross section of the tip coil fixing member 18 is arc-shaped. Side coil fixing members 19 are separately provided on both sides of the tip coil fixing member 18. The area enclosed by the tip coil fixing member 18 and the two side coil fixing members 19 matches the shape of the inducing conductor 23. The tip coil fixing member 18 corresponds to the tip end face of the inducing conductor 23, and the side coil fixing member 19 corresponds to the side end face of the inducing conductor 23. The moving distance value of the tip coil fixing member 18 and the side coil fixing member 19 in the alternating magnetic field and the attenuation of the eddy current are used to facilitate the determination of the theoretical eddy current penetration depth.

[0066] The card slot 4.1 and the cooling channel 8.1 of the tip coil fixing member 18 are both arranged vertically. The tip coil fixing member 18 is smaller in size than the side coil fixing member 19. In order to facilitate the installation of the signal acquisition plug 7, the card slot 4.1 and the cooling channel 8.1 are arranged vertically. The top of the card slot 4.1 passes through the top wall of the tip coil fixing member 18 and is connected to the outside. A shielding pad 20 is clamped between the top of the tip coil fixing member 18 and the gas cap 9. The shielding pad 20 is provided with a through hole 20.1 matching the cooling channel 8.1. The cooling channel 8.1 is connected to the inner wall of the gas cap 9 through the through hole 20.1. The bottom end surface of the shielding pad 20 is horizontally provided with a through slot 20.2 connected to the outside, the through slot 20.2 is connected to the card slot 4.1, and the shielding wire 6 is connected to the signal acquisition plug 7 through the through slot 20.2. The function of the shielding pad 20 is to protect the shielding wire 6 and reduce the impact of the cooling air. At the same time, it also has a shielding and isolation effect on the signal acquisition coil 5. The top of the signal acquisition coil 5 is connected to the signal acquisition plug 7 through the card slot 4.1 and the through slot 20.2 through the shielding wire 6. The bottom end of the signal acquisition coil 5 is connected to the signal acquisition plug 7 through the shielding wire 6 penetrating the outer wall of the back plate 2.1.

[0067] The clamping groove 4.1 of the side coil fixing member 19 is arranged horizontally, and the cooling channel 8.1 is arranged vertically, so as to facilitate the introduction of cooling air and the installation of the signal acquisition plug 7.

[0068] At least one angle adjustment device 21 is provided between the side coil fixing member 19 and the bottom plate 1, and the angle adjustment device 21 includes a first adjustment seat 21.1, a first adjustment screw 21.2, a first adjustment nut 21.3, two fixing plates 21.4, and a guide rod 21.5. The first adjustment seat 21.1 is fixedly connected to the top of the bottom plate 1, and the first adjustment seat 21.1 is provided with a first through hole, and a horizontally arranged first adjustment screw 21.2 is movably penetrated in the first through hole, and one end of the first adjustment screw 21.2 is threaded with a first adjustment nut 21.3, and the first adjustment nut 21.3 is rotatably connected to the first adjustment seat 21.1, and the other end of the first adjustment screw 21.2 is fixed with a vertically arranged guide Rod 21.5, both ends of the guide rod 21.5 are respectively provided with horizontally arranged fixing plates 21.4, the fixing plates 21.4 are fixedly connected to the outer wall of the side coil fixing member 19, the middle of the fixing plate 21.4 is provided with a limiting groove 21.4.1, the two ends of the guide rod 21.5 are respectively slidably arranged in the two limiting grooves 21.4.1, and the first adjusting nut 21.3 in the rotating angle adjustment device 21 drives the first adjusting screw 21.2 to move, and the first adjusting screw 21.2 moves under the action of the limiting groove 21.4.1, so as to drive the side coil fixing member 19 to move or rotate to match the side end face of the inductive conductor 23, and move to the initial spacing between the inductive conductor 23.

[0069] A front-and-rear adjustment device 22 is fixed to the outer wall of the tip coil fixing part 18. The front-and-rear adjustment device 22 includes a second adjustment seat 22.1, a second adjustment screw 22.2, and a second adjustment nut 22.3. A second through hole is opened on the second adjustment seat 22.1. A horizontally arranged second adjustment screw 22.2 is movably penetrated in the second through hole. A second adjustment nut 22.3 is screwed on one end of the second adjustment screw 22.2. The second adjustment nut 22.3 is rotatably connected to the second adjustment seat 22.1. The other end of the second adjustment screw 22.2 is fixedly connected to the tip coil fixing part 18. The second adjustment screw 22.2 in the front-and-rear adjustment device 22 is rotated to drive the second adjustment screw 22.2 to move. The second adjustment screw 22.2 drives the tip coil fixing part 18 to move forward and backward. At present, the tip coil fixing part 18 is driven to move or rotate to match the tip end face of the inducing conductor 23 and ensure the spacing between the inducing conductor 23.

[0070] Since different types of gears need to match different inductive conductors 23, the end face of the inductive conductor 23 is matched with the tooth groove shape of the gear, and different inductive conductors 23 have different spacing requirements. In the later actual quenching process, the spacing and position between the tooth surface and tooth root of the tooth groove to be quenched and the inductive conductor 23 are consistent with the spacing and position settings between the side coil fixing part 19 and the tip coil fixing part 18 and the inductive conductor 23. The angle and position of the side coil fixing part 19 are adjusted by the angle adjustment device 21, and the position of the tip coil fixing part 18 is adjusted by the front and rear adjustment device 22, so that the side coil fixing part 19 and the tip coil fixing part 18 match the end face of the inductive conductor 23.

[0071] By using the side coil fixing part 19 and the tip coil fixing part 18, with the cooperation of the signal acquisition coil 5 and the multi-channel signal collector 17, the theoretical eddy current penetration depth and uniformity of the tooth surface and tooth root surface of the tooth groove under the same quenching parameters can be verified. If the eddy current distribution in the side coil fixing part 19 and the tip coil fixing part 18 is uneven or the eddy current penetration depth is uneven, the angle adjustment device 21 and the front and rear adjustment device 22 are used to adjust the initial spacing between the side coil fixing part 19, the tip coil fixing part 18 and the inductive conductor 23. When the quenched gear is processed, the spacing between the inductive conductor 23 and the tooth groove is set according to the spacing value, so that the hardened layer depth of the tooth surface and tooth root of the tooth groove is consistent and the surface hardness is uniform under the corresponding quenching parameters.

[0072] The specific operations of this embodiment are as follows:

[0073] The difference from the operation process of Example 1 is that:

[0074] Fine-tune the side coil fixing member 19 by the angle adjustment device 21;

[0075] Fine-tune the tip coil fixture 18 by means of the front and rear adjustment device 22;

[0076] The initial distance L between the side coil fixing member 19, the tip coil fixing member 18 and the end faces of the induction conductor 23 is a certain value between 1 mm and 1.8 mm;

[0077] Under the same quenching parameters, the eddy current value and distribution can be collected simultaneously by using the signal collection coils 5 in the tip coil fixture 18 and the two side coil fixtures 19, and it can be known that under the initial spacing, the eddy current collected by the signal collection coils 5 in the tip coil fixture 18 and the two side coil fixtures 19 is the same;

[0078] If the eddy currents collected by the signal collection coils 5 in the tip coil fixing 18 and the two side coil fixings 19 are different, the initial spacing L between the side coil fixings 19, the tip coil fixings 18 and the inducing conductor 23 is fine-tuned by the angle adjustment device 21 and the front-back adjustment device 22 until a suitable initial spacing L is found, and then the same subsequent operations as in Example 1 are performed to determine the quenching parameters.

[0079] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The sensor induced eddy current collection device is characterized in that: It comprises a bottom plate and at least one vertically arranged coil fixing member, wherein the top surface of the bottom plate is slidably provided with the coil fixing member via a sliding connection member; The coil fixing member comprises a back plate and a pressure plate, one side surface of the back plate is detachably connected to the pressure plate, a slot group is provided on the butt joint surface of the back plate and the pressure plate, the slot group comprises a plurality of slots arranged in parallel, a signal acquisition coil is clamped in the slot, two ends of the signal acquisition coil are respectively connected to the signal acquisition plug through the outer wall of the back plate through a shielded wire, and the signal acquisition plug is fixedly connected to the outer wall of the back plate; the signal acquisition plug is connected to the multi-channel signal collector through the shielded wire; There are three coil fixings, namely a tip coil fixing and two side coil fixings. The cross section of the tip coil fixing is arc-shaped. The side coil fixings are separately arranged on both sides of the tip coil fixing. The area enclosed by the tip coil fixing and the two side coil fixings matches the shape of the inducing conductor.

2. The sensor-induced eddy current collection device according to claim 1, characterized in that: At least one cooling channel group is provided in the back plate, each cooling channel group includes a plurality of cooling channels arranged in parallel, the plane where each cooling channel group is located is parallel to the plane where the slot group is located, and both ends of the cooling channel respectively penetrate the plate surface of the back plate.

3. The sensor-induced eddy current collection device according to claim 2, characterized in that: An air cap is provided at the inlet end of the cooling channel group, the air cap is fixedly connected to the back plate, a cooling medium inlet is provided on the outer wall of the air cap, and the interior of the air cap is communicated with the interior of the cooling channel.

4. The sensor-induced eddy current collection device according to claim 1, characterized in that: The sliding connection member includes a slide groove, a slider and a support frame. The top surface of the bottom plate is provided with the slide groove. The slider is slidably arranged in the slide groove. The slider is fixedly connected to the outer wall of the bottom end of the coil fixing member through the support frame.

5. The sensor-induced eddy current collection device according to claim 2, characterized in that: The card slot and the cooling channel of the tip coil fixing piece are both vertically arranged, a shielding pad is clamped between the top end of the tip coil fixing piece and the air cap, the shielding pad is provided with a through hole matching the cooling channel, the cooling channel is connected with the interior of the air cap through the through hole, a through groove connected with the outside is horizontally provided on the bottom end surface of the shielding pad, the through groove is connected with the card slot, and the shielding wire is connected with the signal acquisition plug via the through groove.

6. The sensor-induced eddy current collection device according to claim 5, characterized in that: The clamping groove of the side coil fixing piece is arranged horizontally, and the cooling channel is arranged vertically.

7. The sensor-induced eddy current collection device according to claim 6, characterized in that: At least one angle adjustment device is provided between the side coil fixing piece and the base plate, and the angle adjustment device includes a first adjustment seat, a first adjustment screw, a first adjustment nut, two fixing plates, and a guide rod. The first adjustment seat is fixedly connected to the top end of the base plate, the first adjustment seat is provided with a first through hole, and a horizontally arranged first adjustment screw is movably passed through the first through hole, one end of the first adjustment screw is threaded with the first adjusting nut, the first adjusting nut is rotatably connected to the first adjustment seat, and the other end of the first adjusting screw is fixed with a vertically arranged guide rod, and the two ends of the guide rod are respectively provided with the horizontally arranged fixing plates, the fixing plate is fixedly connected to the outer wall of the side coil fixing piece, a limiting groove is provided in the middle of the fixing plate, and the two ends of the guide rod are respectively slidably arranged in the two limiting grooves.

8. The sensor-induced eddy current collection device according to claim 7, characterized in that: A front-to-back adjustment device is fixed to the outer wall of the tip coil fixing piece, and the front-to-back adjustment device includes a second adjustment seat, a second adjustment screw, and a second adjustment nut. A second through hole is opened on the second adjustment seat, and a horizontally arranged second adjustment screw is movably inserted into the second through hole. A second adjustment nut is threadedly connected to one end of the second adjustment screw, and the second adjustment nut is rotatably connected to the second adjustment seat, and the other end of the second adjustment screw is fixedly connected to the tip coil fixing piece.

9. The sensor-induced eddy current collection device according to claim 1, characterized in that: A sliding frame is provided on the bottom surface of the base plate through track sliding, a guide groove is opened in the middle of the sliding frame, a screw rod is provided in the guide groove, one end of the screw rod movably passes through the outer wall of the sliding frame and is screwed to a rotating nut, the rotating nut is rotatably connected to the sliding frame, and the other end of the screw rod is fixedly connected to the base plate through a connecting plate.

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