CN117144113A - Bearing outer ring heat treatment device and method - Google Patents

Abstract

The invention relates to the technical field of vehicle transmission devices, in particular to a bearing outer ring heat treatment device and a bearing outer ring heat treatment method. The device comprises a base component, an induction component, a first cooling component and a second cooling component. The sensing assembly comprises a first sensing unit, a second sensing unit, a first guide pipe and a second guide pipe. The first sensing unit and the second sensing unit form a series circuit. The first sensing unit, the second sensing unit, the first guide pipe and the second guide pipe form a parallel waterway. The first coolant in the first cooling assembly may cool the sensing assembly. The second coolant in the first cooling assembly may cool the first raceway and the second raceway of the outer ring assembly. Thus, the problem of inconsistent heat treatment effect of a plurality of roller paths of the bearing is solved.

Description

Bearing outer ring heat treatment device and method

Technical Field

The invention relates to the technical field of vehicle transmission devices, in particular to a bearing outer ring heat treatment device and a bearing outer ring heat treatment method.

Background

The bearing mainly comprises an outer ring, an inner ring, rolling bodies and a retainer, and has the advantages of small friction coefficient, high limit rotating speed, simple structure, low manufacturing cost, high precision and the like, thereby being one of the parts commonly used in mechanical equipment. In the running process of the equipment, the inner ring and the outer ring of the bearing are respectively connected with related parts in the equipment, and the rolling bodies form rolling friction in the raceway grooves of the inner ring and the outer ring, so that the functions of reducing friction resistance, reducing vibration, inhibiting noise and improving running smoothness of the equipment can be achieved. The bearing components are typically made of metal materials, and the components are typically heat treated prior to assembly of the bearing to improve the durability of the bearing.

In order to improve the load capacity of the bearing and enable the bearing to bear radial load and axial load at the same time, a double-row rolling element bearing is usually adopted, so that two rows of rolling paths are arranged on the outer ring and the inner ring of the bearing, and the two rows of rolling paths incline at a certain angle. The current heat treatment mode for the bearing mainly comprises the following steps: the upper end and the lower end of the bearing outer ring respectively extend into a disc-shaped heating component, so that the heating component corresponds to the two rows of roller paths respectively, and then the heating component is heated. Because the two heating components are in split arrangement, the heating rates are easy to be inconsistent, and the difference of the heat treatment effects of the two rows of roller paths can be caused, so that the service life of the bearing can be directly influenced.

Disclosure of Invention

The invention provides a bearing outer ring heat treatment device and method for solving the problem that heat treatment effects of a plurality of raceways of a bearing are inconsistent.

In a first aspect, the present invention provides a bearing outer race heat treatment apparatus comprising:

the base assembly comprises a positioning base and a rotary driving part; the positioning base is used for positioning the outer ring assembly; the rotary driving part is used for driving the positioning base to rotate;

the induction assembly comprises a first induction unit, a second induction unit, a first conduit, a second conduit, a connecting conduit and a water return pipe; the first end of the first induction unit is electrically connected with the first guide pipe, the second end of the first induction unit is electrically connected with the second end of the second induction unit through the connecting guide pipe, and the first end of the second induction unit is electrically connected with the second guide pipe; the first sensing unit and the second sensing unit are arranged at intervals; a first communicating pipe is arranged in the first induction unit, and a second communicating pipe is arranged in the second induction unit; the first conduit is communicated with the connecting conduit through the first communicating pipe, and the second conduit is communicated with the connecting conduit through the second communicating pipe; the water return pipe is communicated with the connecting conduit; the first induction unit generates an induction magnetic field when electrified, and the second induction unit generates an induction magnetic field when electrified;

A first cooling assembly including a first coolant supply, a first supply conduit, a first recovery conduit; one end of the first supply pipe is communicated with the first coolant supply part, and the other end of the first supply pipe is communicated with the first conduit and the second conduit respectively; one end of the first recovery pipeline is communicated with the water return pipe, and the other end of the first recovery pipeline is communicated with the first coolant supply part;

a second cooling assembly including a second coolant supply, a second supply pipe, a first injection hole, and a second injection hole; one end of the second supply pipe is communicated with the second coolant supply part, and the other end of the second supply pipe is respectively communicated with the first injection hole and the second injection hole.

In some embodiments, s0> s1+s2, wherein S0 is the return tube bore cross section, S1 is the first conduit bore cross section, and S2 is the second conduit bore cross section.

In some embodiments, S3> S1, wherein S1 is the first conduit bore cross section and S3 is the first conduit bore cross section.

In some embodiments, S4> S2, wherein S2 is the second conduit bore cross-section and S4 is the second communication tube bore cross-section.

In some embodiments, the first sensing unit further comprises a first magnetic focusing part; the first magnetism collecting part is arranged into a semi-conical ring; one end of the first magnetic focusing part inner conical surface is electrically connected with the first guide pipe, and the other end of the first magnetic focusing part inner conical surface is electrically connected with the connecting guide pipe; the first communication pipe is arranged in the first magnetism gathering part; the first conduit is communicated with the connecting conduit through the first communication pipe; the second induction unit also comprises a second magnetism converging part; the second magnetism gathering part is arranged into a semi-conical ring; one end of the second magnetic focusing part inner conical surface is electrically connected with the second guide pipe, and the other end of the second magnetic focusing part inner conical surface is electrically connected with the connecting guide pipe; the second communicating pipe is arranged inside the second magnetism converging part; the second conduit is communicated with the connecting conduit through the second communicating pipe.

In some embodiments, the first magnetic focusing portion and the second magnetic focusing portion have an outer conic arc equal to each other; the first magnetic focusing portion is aligned with the second magnetic focusing portion end.

In some embodiments, the first magnetic focusing portion has an outer conic arc of 110 ° or less.

In some embodiments, the first magnetic focusing portion comprises a first magnetic focusing arc; the first magnetic focusing arc is arranged on the outer conical surface of the first magnetic focusing part, and is recessed towards the inner part of the first magnetic focusing part; the second magnetic focusing part comprises a second magnetic focusing arc; the second magnetic focusing arc is arranged on the outer conical surface of the second magnetic focusing part, and the second magnetic focusing arc is recessed towards the inner part of the second magnetic focusing part.

In some embodiments, min (D1, D2) -D0 is more than or equal to 0.5mm, wherein D1 is the distance between one end point of the outer conical surface of the cross section of the first magnetism collecting part and the inner conical surface of the cross section of the first magnetism collecting part, D2 is the distance between the other end point of the outer conical surface of the cross section of the first magnetism collecting part and the inner conical surface of the cross section of the first magnetism collecting part, and D0 is the minimum distance between the first magnetism collecting arc of the cross section of the first magnetism collecting part and the inner conical surface of the cross section of the first magnetism collecting part; min (d 1, d 2) -d0 is more than or equal to 0.5mm, wherein d1 is the distance between one end point of the outer conical surface of the cross section of the second magnetic focusing part and the inner conical surface of the cross section of the second magnetic focusing part, d2 is the distance between the other end point of the outer conical surface of the cross section of the second magnetic focusing part and the inner conical surface of the cross section of the second magnetic focusing part, and d0 is the minimum distance between the second magnetic focusing arc of the cross section of the second magnetic focusing part and the inner conical surface of the cross section of the second magnetic focusing part.

In some embodiments, the cross-sectional area of the first injection hole is greater than the cross-sectional area of the second injection hole.

In a second aspect, the present invention provides a method for heat treatment of a bearing outer race, comprising:

step S11, based on the outer ring assembly being positioned on the base assembly, the base assembly conveys the outer ring assembly to a heat treatment position; wherein the heat treatment location comprises a first raceway of the outer ring assembly being located above a second raceway of the outer ring assembly, a first sensing unit of a sensing assembly being adjacent to the first raceway, a second sensing unit of the sensing assembly being adjacent to the second raceway; the included angle between the first rollaway nest and the second rollaway nest is more than 0 degrees and less than 180 degrees;

Step S12, based on the outer ring assembly being positioned at the heat treatment position, the base assembly drives the outer ring assembly to rotate around the axis of the outer ring assembly;

step S13, based on the rotation of the outer ring assembly, the induction assembly heats the first roller path and the second roller path;

step S14, based on the temperatures of the first roller path and the second roller path reaching a first temperature, the induction component stops heating;

and step S15, based on the induction component stopping heating, the first injection hole of the cooling component injects coolant to the first raceway, and the second injection hole of the cooling component injects coolant to the second raceway.

In order to solve the problem of inconsistent heat treatment effects of a plurality of raceways of the bearing, the invention has the following advantages:

the first sensing unit, the connecting conduit and the second sensing unit are electrically connected in sequence to form a series connection. When the first induction unit and the second induction unit are electrified, the series connection mode can enable the temperature rising rates of the first induction unit and the second induction unit to be consistent, so that the heat treatment effects of the first roller path and the second roller path are guaranteed to be the same, and the service lives of the first roller path and the second roller path can be prolonged.

The first conduit of the first sensing unit and the second conduit of the second sensing unit may form a parallel conduit. The cooling rates of the first induction unit and the second induction unit are consistent in this way, and the strength of the first induction unit and the second induction unit after heat treatment is identical can be ensured, so that the service life of the bearing is prolonged.

After the first and second raceways are heated, the coolant can be delivered from the second coolant supply unit to the first and second injection holes through the second supply pipe, and injected from the first and second injection holes to the first and second raceways. In this way, the first roller path and the second roller path can be cooled down quickly, so that stress concentration of the first roller path and the second roller path in the processing process is eliminated, and the strength of the first roller path and the second roller path can be increased.

Drawings

FIG. 1 shows a schematic view of a bearing outer race heat treatment apparatus of an embodiment;

FIG. 2 shows a schematic view of a bearing outer race heat treatment apparatus of another embodiment;

FIG. 3 illustrates a schematic diagram of an inductive component of an embodiment;

FIG. 4 shows a schematic diagram of an inductive component of another embodiment;

FIG. 5 shows a schematic diagram of an inductive component of yet another embodiment;

FIG. 6 shows a schematic diagram of an inductive component of another embodiment;

FIG. 7 shows a schematic view of a method of heat treating a bearing outer race according to an embodiment.

Reference numerals: a base assembly; 11, positioning a base; 02, an induction component; a first sensing unit 21; 211 a first magnetic focusing part; 2111, first magnetic focusing arc; 212 a first communication tube; 22 a second sensing unit; 221 a second magnetic focusing part; 2211 second magnetic arc; 222 a second communication pipe; 23 a first conduit; a second conduit 24; 25 connecting a conduit; 26 return pipes; 03 a second cooling assembly; 31 a second supply conduit; 32 first injection holes; 33 second injection holes; 04 an outer ring component; 41 an outer ring body; 42 a first raceway; 43 a second raceway; 44 flange.

Detailed Description

The disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those of ordinary skill in the art to better understand and thus practice the present disclosure, and are not meant to imply any limitation on the scope of the present disclosure.

As used herein, the term "comprising" and variants thereof are to be interpreted as meaning "including but not limited to" open-ended terms. The term "based on" is to be interpreted as "based at least in part on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment. The term "another embodiment" is to be interpreted as "at least one other embodiment". The terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "transverse", "longitudinal", etc. refer to an orientation or positional relationship based on that shown in the drawings. These terms are only used to better describe the present application and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations. Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present application will be understood by those of ordinary skill in the art according to the specific circumstances. Furthermore, the terms "mounted," "configured," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances. Furthermore, the terms "first," "second," and the like, are used primarily to distinguish between different devices, elements, or components (the particular species and configurations may be the same or different), and are not used to indicate or imply the relative importance and number of devices, elements, or components indicated. Unless otherwise indicated, the meaning of "a plurality" is two or more.

The embodiment discloses a bearing outer ring heat treatment device, as shown in fig. 1 and 2, may include:

a base assembly 01, the base assembly 01 including a positioning base 11 and a rotation driving part; the positioning base 11 is used for positioning the outer ring assembly 04; the rotation driving part is used for driving the positioning base 11 to rotate;

the induction component 02, the induction component 02 comprises a first induction unit 21, a second induction unit 22, a first conduit 23, a second conduit 24, a connecting conduit 25 and a return pipe 26; the first end of the first sensing unit 21 is electrically connected with the first conduit 23, the second end of the first sensing unit 21 is electrically connected with the second end of the second sensing unit 22 through the connecting conduit 25, and the first end of the second sensing unit 22 is electrically connected with the second conduit 24; the first sensing unit 21 and the second sensing unit 22 are arranged at intervals; the first communication pipe 212 is arranged inside the first sensing unit 21, and the second communication pipe 222 is arranged inside the second sensing unit 22; the first conduit 23 is communicated with the connecting conduit 25 through the first communicating pipe 212, and the second conduit 24 is communicated with the connecting conduit 25 through the second communicating pipe 222; the water return pipe 26 is communicated with the connecting conduit 25; the first induction unit 21 generates an induction magnetic field when energized, and the second induction unit 22 generates an induction magnetic field when energized;

A first cooling assembly including a first coolant supply, a first supply conduit, a first recovery conduit; one end of the first supply pipe communicates with the first coolant supply portion, and the other end of the first supply pipe communicates with the first conduit 23 and the second conduit 24, respectively; one end of the first recovery pipe is communicated with the return pipe 26, and the other end of the first recovery pipe is communicated with the first coolant supply part;

a second cooling module 03, the second cooling module 03 including a second coolant supply portion, a second supply pipe 31, a first injection hole 32, and a second injection hole 33; one end of the second supply pipe 31 communicates with the second coolant supply portion, and the other end of the second supply pipe 31 communicates with the first injection hole 32 and the second injection hole 33, respectively.

In this embodiment, the bearing may be a component disposed between the wheel and the drive axle shaft that reduces torque loss from the drive axle shaft driving the wheel. Since the weight of a vehicle is large and the load requirement on the bearing is high, two rows of rolling elements are usually provided in the raceway grooves of the inner ring and the outer ring of the bearing. In order to allow the bearing to bear both axial and radial loads, the two rows of raceway grooves will exhibit an angular inclination. In order to further improve the strength and the service life of the bearing, the metal parts of the bearing can be subjected to heat treatment, and a bearing outer ring heat treatment device is further provided. As shown in fig. 1 and 2, the bearing outer ring heat treatment device may include a base assembly 01, an induction assembly 02, a first cooling assembly, and a second cooling assembly 03. The outer ring assembly 04 can be placed on the base assembly 01, and the base assembly 01 can fix the position of the outer ring assembly 04. During warming, the sensing assembly 02 may be disposed adjacent to the first and second raceways 42, 43 of the inner circumferential surface of the outer ring assembly 04. The first cooling assembly may be provided integrally with the sensing assembly 02. The second cooling assembly 03 may be disposed adjacent to the sensing assembly 02.

The base assembly 01 may include a positioning base 11, a rotation driving part. The positioning base 11 may be a disc with a boss at an upper end, and the boss may limit the horizontal position of the outer ring assembly 04 when the outer ring assembly 04 is placed and fixed on the positioning base 11. The rotary driving part can be concentrically arranged at the lower end of the positioning base 11, and when the rotary driving part drives the positioning base 11 to rotate, the outer ring assembly 04 on the positioning base 11 can be ensured not to deflect.

The sensing assembly 02 may include a first sensing unit 21, a second sensing unit 22, a first conduit 23, a second conduit 24, a connecting conduit 25, and a return pipe 26. The first conduit 23 may be electrically connected to a first end of the first sensing unit 21, a second end of the first sensing unit 21 may be electrically connected to a second end of the second sensing unit 22 through a connection conduit 25, and a first end of the second sensing unit 22 may be electrically connected to a second conduit 24, thereby forming a series circuit. When the first sensing unit 21 and the second sensing unit 22 start to heat, the series arrangement mode can make the heating rates of the first sensing unit 21 and the second sensing unit 22 consistent, and can ensure that the currents in the first sensing unit 21 and the second sensing unit 22 are the same in magnitude and direction, so that the temperatures of the first roller path 42 and the second roller path 43 are consistent, and the strength of the first roller path 42 and the second roller path 43 after heat treatment is consistent. The first sensing unit 21 and the second sensing unit 22 may be disposed at intervals, so that the temperature of the adjacent ends of the first sensing unit 21 and the second sensing unit 22 can be prevented from being too high. The first sensing unit 21 may be provided therein with a first communication pipe 212, a first end of the first communication pipe 212 may be communicated with a first end of the first conduit 23, and a second end of the first communication pipe 212 may be communicated with a first end of the connection conduit 25. In this way parallel cooling lines can be formed. The second sensing unit 22 may be provided therein with a second communication pipe 222, a first end of the second communication pipe 222 may be in communication with a first end of the second conduit 24, and a second end of the second communication pipe 222 may be in communication with a second end of the connection conduit 25. A first end of the return pipe 26 may be in communication with a third end of the connecting conduit 25. When the first sensing unit 21 and the second sensing unit 22 are electrified, an induced magnetic field can be generated, and electrons in the first roller path 42 and the second roller path 43 of the outer ring assembly 04 can be changed in direction at high frequency, so that the synchronous temperature rise is realized. In the heating process, the temperature of the first sensing unit 21 and the second sensing unit 22 can be raised due to the high current, and the heat radiation generated after the temperature of the first rolling path 42 and the second rolling path 43 is raised can also transfer the heat to the first sensing unit 21 and the second sensing unit 22, so that the temperature of the first sensing unit 21 and the second sensing unit 22 is further raised. At this time, the first coolant in the first coolant supply unit may enter the first communication pipe 212 and the second communication pipe 222 from the first pipe 23 and the second pipe 24 at the same time, and then flow to the return pipe 26 through the connection pipe 25. The parallel pipeline arrangement can lead the first coolant to take away the heat of the first sensing unit 21 and the second sensing unit 22 at the same speed, and can avoid the damage of the first sensing unit 21 and the second sensing unit 22 caused by high temperature.

The first cooling assembly may include a first coolant supply, a first supply conduit, a first recovery conduit. The first supply pipe may be a single pipe divided into double pipes, a single pipe end of the first supply pipe may be in communication with a first end of the first coolant supply portion, and double pipe ends of the first supply pipe may be in communication with second ends of the first and second pipes 23, 24, respectively. The first end of the first recovery pipe may be in communication with the second end of the return pipe 26, and the second end of the first recovery pipe may be in communication with the second end of the first coolant supply. When the first and second sensing units 21 and 22 start heating, the first coolant may flow from the first coolant supply portion to the first and second conduits 23 and 24, respectively, and then enter the first and second communication pipes 212 and 222 to absorb heat of the first and second sensing units 21 and 22, and then enter the return pipe 26 through the connection conduit 25 to flow to the first recovery pipe, and finally flow to the first coolant supply portion through the first recovery pipe, thereby forming a circulation of the first coolant in the parallel pipeline. In this way, the first coolant can be reused, and the effect of reducing the production cost can be achieved while the cooling effect is ensured.

The second cooling assembly 03 may include a second coolant supply, a second supply pipe 31, a first spray hole 32, and a second spray hole 33. A first end of the second supply pipe 31 may communicate with the second coolant supply, and a second end of the second supply pipe 31 may communicate with the first injection hole 32 and the second injection hole 33, respectively. When the first and second raceways 42, 43 are heated, the second coolant in the second coolant supply portion can flow to the first and second injection holes 32, 33 through the second supply pipe 31, and the second coolant is injected to the first and second raceways 42, 43 through the first and second injection holes 32, 33, so that the first and second raceways 42, 43 are cooled rapidly at the same rate, thereby completing the quenching treatment, the surface hardness of the first and second raceways 42, 43 can be increased, and the surface hardness of the first and second raceways 42, 43 can be uniform, thereby prolonging the service lives of the first and second raceways 42, 43.

In some embodiments, as shown in fig. 3, 4, 5, and 6, s0> s1+s2, where S0 is the inner bore cross section of the return pipe 26, S1 is the inner bore cross section of the first conduit 23, and S2 is the inner bore cross section of the second conduit 24.

In this embodiment, as shown in fig. 3, 4, 5 and 6, the inner bore cross section of the water return pipe 26 may be S0, the inner bore cross section of the first conduit 23 may be S1, and the inner bore cross section of the second conduit 24 may be S2. When the first and second sensing units 21 and 22 start heating the first and second raceways 42 and 43, the first coolant is input from the first and second pipes 23 and 24 and then flows to the return pipe 26 through the first and second communication pipes 212 and 222. When the second coolant of the first communication pipe 212 and the second communication pipe 222 simultaneously merges into the return pipe 26 in opposite directions, turbulence is generated, resulting in a decrease in the speed at which the second coolant enters the return pipe 26. S0 may be greater than the sum of S1 and S2, and the second coolant in the first communication pipe 212 and the second communication pipe 222 may flow out from the water return pipe 26 at the same flow rate, so that the cooling rates of the first sensing unit 21 and the second sensing unit 22 are kept consistent.

In some embodiments, as shown in fig. 3 and 4, S3> S1, where S1 is the inner bore cross section of the first conduit 23 and S3 is the inner bore cross section of the first communication tube 212.

In this embodiment, as shown in fig. 3 and 4, the inner bore cross section of the first conduit 23 may be S1, and the inner bore cross section of the first communication pipe 212 may be S3. When the first sensing unit 21 heats the first raceway 42, the first coolant flows from the first conduit 23 to the first communication pipe 212. S3 may be greater than S1, so that the first conduit 23 forms a buffer chamber, so that the flow rate of the first coolant decreases after flowing from the first conduit 23 to the first communication pipe 212, and the heat exchange time between the first coolant and the first sensing unit 21 may be prolonged. Further, more first coolant may be accommodated in the first communication pipe 212, and the first coolant may be allowed to sufficiently absorb heat of the first sensing unit 21, thereby maintaining the operation temperature of the first sensing unit 21 within a normal range.

In some embodiments, as shown in fig. 3, 4, S4> S2, where S2 is the second conduit 24 bore cross-section and S4 is the second communication tube 222 bore cross-section.

In this embodiment, as shown in fig. 3 and 4, the inner bore cross section of the second conduit 24 may be S2, and the inner bore cross section of the second communicating tube 222 may be S4. When the second sensing unit 22 heats the second raceway 43, the first coolant flows from the second conduit 24 to the second communicating tube 222. S4 may be greater than S2, so that the second conduit 24 forms a buffer chamber, so that the flow rate of the first coolant decreases after flowing from the second conduit 24 to the second communication pipe 222, and the heat exchange time between the first coolant and the second sensing unit 22 may be prolonged. Further, more first coolant may be accommodated in the second communication pipe 222, and the first coolant may be allowed to sufficiently absorb heat of the second sensing unit 22, thereby maintaining the operation temperature of the second sensing unit 22 within a normal range.

In some embodiments, as shown in fig. 3, 4 and 6, the first sensing unit 21 further includes a first magnetic focusing portion 211; the first magnetism collecting part 211 is arranged as a semi-conical ring; one end of the inner conical surface of the first magnetism collecting part 211 is electrically connected with the first guide pipe 23, and the other end of the inner conical surface of the first magnetism collecting part 211 is electrically connected with the connecting guide pipe 25; the first communication pipe 212 is provided inside the first magnetism collecting part 211; the first conduit 23 communicates with the connecting conduit 25 through the first communication pipe 212; the second sensing unit 22 further includes a second magnetism gathering portion 221; the second magnetism collecting part 221 is arranged in a semi-conical ring; one end of the inner conical surface of the second magnetic focusing part 221 is electrically connected with the second guide pipe 24, and the other end of the inner conical surface of the second magnetic focusing part 221 is electrically connected with the connecting guide pipe 25; the second communication pipe 222 is provided inside the second magnetism collecting part 221; the second conduit 24 communicates with the connecting conduit 25 through a second communicating tube 222.

In this embodiment, as shown in fig. 3, 4 and 6, the second sensing unit 22 may further include a second magnetic focusing part 221. Because the first roller path 42 and the second roller path 43 are inclined at a certain angle, the second magnetic focusing part 221 can be arranged into a semi-conical ring with the radian identical to that of the second roller path 43, so that the second magnetic focusing part 221 can extend into the inner peripheral side of the outer ring assembly 04 and is arranged adjacent to the second roller path 43, thereby preparing for heating. A first end of the inner tapered surface of the second magnetic focusing part 221 may be electrically connected to a first end of the second guide pipe 24, and a second end of the inner tapered surface of the second magnetic focusing part 221 may be electrically connected to a second end of the connecting guide pipe 25. The second communication pipe 222 may be disposed inside the second magnetism collecting part 221. The second conduit 24 may communicate with the connection conduit 25 through a second communicating tube 222. The first sensing unit 21 may further include a first magnetism collecting part 211. In order to make the heating rates of the first and second raceways 42 and 43 uniform, the first magnetism collecting portion 211 may be provided as a half conical ring identical to the second magnetism collecting portion 221. A first end of the inner tapered surface of the first magnetic focusing part 211 may be electrically connected to a first end of the first conduit 23, and a second end of the inner tapered surface of the first magnetic focusing part 211 may be electrically connected to a first end of the connecting conduit 25. The first communication pipe 212 may be disposed inside the first magnetism collecting part 211. The first conduit 23 may communicate with the connecting conduit 25 through a first communication pipe 212. The first magnetism collecting part 211 is electrically connected to the second magnetism collecting part 221 via the connection pipe 25 to form a series connection, and after the current is applied, the first magnetism collecting part 211 and the second magnetism collecting part 221 can heat the first raceway 42 and the second raceway 43 at the same rate, so that the strength of the first raceway 42 and the second raceway 43 can be improved. When the heating is started, the first magnetic focusing part 211 and the second magnetic focusing part 221 are connected with a large current, so that the temperature of the magnetic focusing parts is increased. The magnetic fields generated by the first and second magnetic focusing portions 211 and 221 continuously change the direction of electrons in the first and second raceways 42 and 43, and thus the temperatures of the first and second raceways 42 and 43 can be increased. Heat radiation is generated when the temperatures of the first and second raceways 42 and 43 are increased, and the temperatures of the first and second magnetic focusing portions 211 and 221 are further increased. In order to keep the temperatures of the first and second magnetic focusing portions 211 and 221 within the limit values, the first coolant supply portion may be conveyed to the first and second pipes 23 and 24 through the first supply pipe. And then flows from the first and second pipes 23 and 24 to the first and second communication pipes 212 and 222, thereby absorbing heat of the first and second magnetic focusing parts 211 and 221. The first coolant in the first communication pipe 212 and the second communication pipe 222 is returned to the first coolant supply unit through the connection pipe 25, the return pipe 26, and the first recovery pipe in this order.

In some embodiments, as shown in fig. 1, 3 and 4, the outer conical radians of the first magnetic focusing part 211 and the second magnetic focusing part 221 are equal; the first magnetic focusing portion 211 is aligned with the end of the second magnetic focusing portion 221.

In this embodiment, as shown in fig. 1, 3 and 4, in order to facilitate the second magnetic portion 221 to extend into the outer ring assembly 04 with the first raceway 42 and the second raceway 43 at a certain angle, the second magnetic portion 221 may be configured as a semi-conical ring. In order that the first and second magnetic focusing portions 211, 221 may heat up the first and second raceways 42, 43 at the same rate after energizing, the first magnetic focusing portion 211 may have the same outer conic curvature as the second magnetic focusing portion 221, and the first magnetic focusing portion 211 may be aligned with the second magnetic focusing portion 221 end.

In some embodiments, as shown in fig. 1 and 4, the outer conic radian of the first magnetic focusing part 211 is less than or equal to 110 °.

In this embodiment, as shown in fig. 1 and 4, in order to make the heating rates of the first raceway 42 and the second raceway 43 uniform, the outer conic degrees of the first magnetism collecting part 211 and the second magnetism collecting part 221 may be set to be the same. The second magnetic focusing portion 221 cannot be a whole truncated cone in order to facilitate the second magnetic focusing portion 221 to extend into the inner peripheral side of the outer ring assembly 04 and be disposed adjacent to the second raceway 43, affected by the minimum inner diameter at the junction of the first raceway 42 and the second raceway 43 of the outer ring assembly 04. The first and second magnetic focusing portions 211 and 221 may be provided as a half-conical table. When the first and second magnetic focusing portions 211 and 221 heat the first and second raceways 42 and 43, the outer ring assembly 04 rotates around its own axis, and the outer ring assembly 04 tends to deflect as the rotational speed increases. The runout may change the distances between the first track 42 and the second track 43 and the first magnetic focusing portion 211 and the second magnetic focusing portion 221, so that the heating is uneven, and even the first track 42 and the second track 43 collide with the first magnetic focusing portion 211 and the second magnetic focusing portion 221. The outer conical radians of the first magnetic focusing part 211 and the second magnetic focusing part 221 are large, and the parts of the first roller path 42 and the second roller path 43 can be heated uniformly while the rotation speed of the outer ring assembly 04 is reduced. In order to allow the second magnetic focusing portion 221 to extend into the inner peripheral side of the outer ring assembly 04 and be adjacent to the second raceway 43, and to reduce the rotation speed of the outer ring assembly 04 while uniformly heating each portion of the first raceway 42 and the second raceway 43, the outer conical arc of the second magnetic focusing portion 221 may be 110 ° or less.

In some embodiments, as shown in fig. 3, 4, and 6, the first magnetism gathering portion 211 includes a first magnetism gathering arc 2111; the first magnetism collecting arc 2111 is arranged on the outer conical surface of the first magnetism collecting part 211, and the first magnetism collecting arc 2111 is recessed towards the inside of the first magnetism collecting part 211; the second magnetic focusing part 221 includes a second magnetic focusing arc 2211; the second magnetic flux 2211 is disposed at an outer tapered surface of the second magnetic flux 221, and the second magnetic flux 2211 is recessed toward an inside of the second magnetic flux 221.

In the present embodiment, as shown in fig. 3, 4 and 6, the bearing is stressed more in the middle portions of the first and second raceways 42 and 43 than in the both ends, so that the strength requirements of the middle portions of the first and second raceways 42 and 43 may be greater than those of the both end portions of the first and second raceways 42 and 43. The first magnetism collecting part 211 may include a first magnetism collecting arc 2111. The second magnetic focusing part 221 may include a second magnetic focusing arc 2211. When the first and second magnetic focusing portions 211 and 221 are energized to heat the first and second raceways 42 and 43, the first magnetic focusing arc 2111 may be provided at an outer tapered surface of the first magnetic focusing portion 211, and the first magnetic focusing arc 2111 may be recessed toward the inside of the first magnetic focusing portion 211. The second magnetic arc 2211 may be disposed at an outer tapered surface of the second magnetic focusing part 221, and the second magnetic arc 2211 may be recessed toward the inside of the second magnetic focusing part 221. In this way, the magnetic flux generated by the first magnetism collecting portion 211 may be concentrated toward the middle portion of the first raceway 42, so that the magnetic flux density of the middle portion of the first raceway 42 is greater than that of the two ends, thereby allowing the middle portion of the first raceway 42 to reach the quenching temperature more rapidly, and the depth of the quenching layer of the middle portion of the first raceway 42 is greater than that of the two end quenching layers, thereby increasing the heating rate while ensuring the first raceway 42 (the manner and effect of the second raceway 43 are the same, and will not be described in detail herein).

In some embodiments, as shown in fig. 1, 3 and 4, min (D1, D2) -D0 is greater than or equal to 0.5mm, where D1 is a distance between an end point of an outer conical surface of a cross section of the first magnetic focusing portion 211 and an inner conical surface of the cross section of the first magnetic focusing portion 211, D2 is a distance between another end point of the outer conical surface of the cross section of the first magnetic focusing portion 211 and an inner conical surface of the cross section of the first magnetic focusing portion 211, and D0 is a minimum distance between a first magnetic focusing arc 2111 of the cross section of the first magnetic focusing portion 211 and the inner conical surface of the cross section of the first magnetic focusing portion 211; min (d 1, d 2) -d0 is more than or equal to 0.5mm, wherein d1 is the distance between one end point of the outer conical surface of the cross section of the second magnetic focusing part 221 and the inner conical surface of the cross section of the second magnetic focusing part 221, d2 is the distance between the other end point of the outer conical surface of the cross section of the second magnetic focusing part 221 and the inner conical surface of the cross section of the second magnetic focusing part 221, and d0 is the minimum distance between the second magnetic focusing arc 2211 of the cross section of the second magnetic focusing part 221 and the inner conical surface of the cross section of the second magnetic focusing part 221.

In this embodiment, as shown in fig. 1, 3 and 4, a distance between one end of the outer conical surface of the cross section of the first magnetic focusing portion 211 and the inner conical surface of the cross section of the first magnetic focusing portion 211 may be D1, a distance between the other end of the outer conical surface of the cross section of the first magnetic focusing portion 211 and the inner conical surface of the cross section of the first magnetic focusing portion 211 may be D2, and a minimum distance between the first magnetic focusing arc 2111 of the cross section of the first magnetic focusing portion 211 and the inner conical surface of the cross section of the first magnetic focusing portion 211 may be D0. When the first magnetic focusing portion 211 heats the first raceway 42, the difference between the minimum value of D1 and D2 and D0 may be 0.5mm or more, and in this value range, the induced magnetic force lines may be sufficiently concentrated in the middle portion of the first raceway 42, so that the production efficiency may be improved on the premise of ensuring that the first raceway 42 meets the strength requirement. The distance between one end point of the outer conical surface of the cross section of the second magnetic focusing part 221 and the inner conical surface of the cross section of the second magnetic focusing part 221 may be d1, the distance between the other end point of the outer conical surface of the cross section of the second magnetic focusing part and the inner conical surface of the cross section of the second magnetic focusing part 221 may be d2, and the minimum distance between the second arc 2211 of the cross section of the second magnetic focusing part 221 and the inner conical surface of the cross section of the second magnetic focusing part 221 may be d0. When the second magnetic focusing part 221 heats the second raceway 43, the difference between the minimum value of d1 and d2 and d0 may be 0.5mm or more, and in this value range, the induced magnetic force lines may be sufficiently concentrated in the middle portion of the second raceway 43, and the production efficiency may be improved while ensuring that the first raceway 42 meets the strength requirement.

In some embodiments, as shown in FIG. 1, the cross-sectional area of the first injection hole 32 is greater than the cross-sectional area of the second injection hole 33.

In the present embodiment, as shown in fig. 1, since the first raceway 42 is provided above the second raceway 43, the cross-sectional area of the first injection hole 32 may be larger than the cross-sectional area of the second injection hole 33, and the second coolant flow rate injected from the first injection hole 32 may be made larger than the second injection hole 33. The second coolant injected into the first raceway 42 flows to the second raceway 43 due to gravity, and the second coolant injected from the first injection holes 32 cools the first raceway 42 and then continues to cool the second raceway 43. In this way, the cooling rates of the first raceway 42 and the second raceway 43 can be made equal, and the amount of the second coolant used can be reduced, so that the production cost can be reduced while ensuring the cooling effect.

In some embodiments, as shown in fig. 7, step S11, based on the positioning of the outer ring assembly 04 at the base assembly 01 being completed, the base assembly 01 conveys the outer ring assembly 04 to the heat treatment position; wherein the heat treatment location includes the first raceway 42 of the outer ring assembly 04 being located above the second raceway 43 of the outer ring assembly 04, the first sensing element 21 of the sensing assembly 02 being adjacent the first raceway 42, the second sensing element 22 of the sensing assembly 02 being adjacent the second raceway 43; the first rollaway nest 42 and the second rollaway nest 43 have an included angle of more than 0 ° and less than 180 °; step S12, based on the outer ring assembly 04 being positioned at the heat treatment position, the base assembly 01 drives the outer ring assembly 04 to rotate around the axis of the outer ring assembly 04; step S13, based on the rotation of the outer ring assembly 04, the induction assembly 02 heats the first raceway 42 and the second raceway 43; step S14, based on the temperatures of the first raceway 42 and the second raceway 43 reaching the first temperature, the induction component 02 stops heating; in step S15, based on the sensing assembly 02 stopping heating, the first injection holes 32 of the cooling assembly inject the second coolant to the first raceway 42, and the second injection holes 33 of the cooling assembly inject the second coolant to the second raceway 43.

In this embodiment, as shown in fig. 7, the outer ring assembly 04 may be disposed on the upper surface of the positioning base 11 of the base assembly 01, and is clamped by the protruding portion of the positioning base 11, so as to complete positioning. After positioning is completed, the base assembly 01 may transport the outer race assembly 04 to a heat treatment location. The heat treatment location may include, among other things, the first raceway 42 of the outer ring assembly 04 being located above the second raceway 43 of the outer ring assembly 04, the first sensing element 21 of the sensing assembly 02 being adjacent the first raceway 42, the second sensing element 22 of the sensing assembly 02 being adjacent the second raceway 43. In order for the bearing to withstand both radial and axial forces, the first raceway 42 may be at an angle of greater than 0 ° and less than 180 ° to the second raceway 43.

When the outer ring assembly 04 is located at the heat treatment position, since the first and second magnetic focusing parts 211 and 221 may be disposed as semi-conical rings, the base assembly 01 may drive the outer ring assembly 04 to rotate about the axis of the outer ring assembly 04. When the outer ring assembly 04 rotates to a certain speed, the induction assembly 02 is electrified and generates a magnetic field, and the first roller path 42 and the second roller path 43 can be heated by using the principle of electromagnetic induction heating. In this way, the first magnetic focusing part 211 and the second magnetic focusing part 221 can uniformly heat the parts of the first roller path 42 and the second roller path 43, so that the overall strength of the first roller path 42 and the second roller path 43 can be improved, and the service life can be prolonged.

When the sensing assembly 02 stops heating, the second coolant may be delivered from the second coolant supply to the first injection hole 32 and the second injection hole 33 through the second supply pipe 31, and then injected from the first injection hole 32 to the first raceway 42, and then injected from the second injection hole 33 to the second raceway 43. The first and second raceways 42, 43 can be cooled rapidly, thereby completing the heat treatment to prevent the first and second raceways 42, 43 from deforming and cracking, and the strength and service life of the first and second raceways 42, 43 can be increased.

In other embodiments, the outer ring assembly 04 may further include an outer ring body 41 and a flange 44. The outer ring body 41 may be a hollow frustum, and the inner circumferential surface thereof may be provided with a first raceway 42 and a second raceway 43. The flange 44 may be a disc with a plurality of threaded holes, and may be concentrically disposed at one end of the outer ring body 41. The base assembly 01 can further comprise a vertical driving part and a horizontal driving part for driving the positioning base 11 to move vertically and horizontally, and the positioning base 11 can be driven to move freely according to different heating positions.

It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples of implementing the disclosure, and that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure.

Claims (11)

1. A bearing outer race heat treatment device, characterized in that the bearing outer race heat treatment device comprises:

the base assembly comprises a positioning base and a rotary driving part; the positioning base is used for positioning the outer ring assembly; the rotary driving part is used for driving the positioning base to rotate;

the induction assembly comprises a first induction unit, a second induction unit, a first conduit, a second conduit, a connecting conduit and a water return pipe; the first end of the first induction unit is electrically connected with the first guide pipe, the second end of the first induction unit is electrically connected with the second end of the second induction unit through the connecting guide pipe, and the first end of the second induction unit is electrically connected with the second guide pipe; the first sensing unit and the second sensing unit are arranged at intervals; a first communicating pipe is arranged in the first induction unit, and a second communicating pipe is arranged in the second induction unit; the first conduit is communicated with the connecting conduit through the first communicating pipe, and the second conduit is communicated with the connecting conduit through the second communicating pipe; the water return pipe is communicated with the connecting conduit; the first induction unit generates an induction magnetic field when electrified, and the second induction unit generates an induction magnetic field when electrified;

A first cooling assembly including a first coolant supply, a first supply conduit, a first recovery conduit; one end of the first supply pipe is communicated with the first coolant supply part, and the other end of the first supply pipe is communicated with the first conduit and the second conduit respectively; one end of the first recovery pipeline is communicated with the water return pipe, and the other end of the first recovery pipeline is communicated with the first coolant supply part;

a second cooling assembly including a second coolant supply, a second supply pipe, a first injection hole, and a second injection hole; one end of the second supply pipe is communicated with the second coolant supply part, and the other end of the second supply pipe is respectively communicated with the first injection hole and the second injection hole.

2. A bearing outer race heat treatment device according to claim 1, characterized in that,

s0> S1+S2, wherein S0 is the inner hole cross section of the return pipe, S1 is the inner hole cross section of the first conduit, and S2 is the inner hole cross section of the second conduit.

3. A bearing outer race heat treatment device according to claim 1, characterized in that,

S3> S1, wherein S1 is the inner hole cross section of the first conduit, and S3 is the inner hole cross section of the first communication pipe.

4. A bearing outer race heat treatment device according to claim 1, characterized in that,

s4> S2, wherein S2 is the inner hole cross section of the second conduit, and S4 is the inner hole cross section of the second communicating pipe.

5. A bearing outer race heat treatment device according to claim 1, characterized in that,

the first induction unit further comprises a first magnetism gathering part; the first magnetism collecting part is arranged into a semi-conical ring; one end of the first magnetic focusing part inner conical surface is electrically connected with the first guide pipe, and the other end of the first magnetic focusing part inner conical surface is electrically connected with the connecting guide pipe; the first communication pipe is arranged in the first magnetism gathering part; the first conduit is communicated with the connecting conduit through the first communication pipe; the second induction unit also comprises a second magnetism converging part; the second magnetism gathering part is arranged into a semi-conical ring; one end of the second magnetic focusing part inner conical surface is electrically connected with the second guide pipe, and the other end of the second magnetic focusing part inner conical surface is electrically connected with the connecting guide pipe; the second communicating pipe is arranged inside the second magnetism converging part; the second conduit is communicated with the connecting conduit through the second communicating pipe.

6. A bearing outer race heat treatment device according to claim 5, characterized in that,

the outer conical radian of the first magnetic focusing part is equal to that of the second magnetic focusing part; the first magnetic focusing portion is aligned with the second magnetic focusing portion end.

7. A bearing outer race heat treatment device according to claim 6, characterized in that,

the radian of the outer cone of the first magnetism gathering part is smaller than or equal to 110 degrees.

8. A bearing outer race heat treatment device according to claim 5, characterized in that,

the first magnetism gathering part comprises a first magnetism gathering arc; the first magnetic focusing arc is arranged on the outer conical surface of the first magnetic focusing part, and is recessed towards the inner part of the first magnetic focusing part; the second magnetic focusing part comprises a second magnetic focusing arc; the second magnetic focusing arc is arranged on the outer conical surface of the second magnetic focusing part, and the second magnetic focusing arc is recessed towards the inner part of the second magnetic focusing part.

9. A bearing outer race heat treatment device according to claim 8, characterized in that,

min (D1, D2) -D0 is more than or equal to 0.5mm, wherein D1 is the distance between one end point of the outer conical surface of the cross section of the first magnetism collecting part and the inner conical surface of the cross section of the first magnetism collecting part, D2 is the distance between the other end point of the outer conical surface of the cross section of the first magnetism collecting part and the inner conical surface of the cross section of the first magnetism collecting part, and D0 is the minimum distance between the first magnetism collecting arc of the cross section of the first magnetism collecting part and the inner conical surface of the cross section of the first magnetism collecting part; min (d 1, d 2) -d0 is more than or equal to 0.5mm, wherein d1 is the distance between one end point of the outer conical surface of the cross section of the second magnetic focusing part and the inner conical surface of the cross section of the second magnetic focusing part, d2 is the distance between the other end point of the outer conical surface of the cross section of the second magnetic focusing part and the inner conical surface of the cross section of the second magnetic focusing part, and d0 is the minimum distance between the second magnetic focusing arc of the cross section of the second magnetic focusing part and the inner conical surface of the cross section of the second magnetic focusing part.

10. A bearing outer race heat treatment device according to claim 1, characterized in that,

the cross-sectional area of the first injection hole is larger than the cross-sectional area of the second injection hole.

11. A bearing outer ring heat treatment method applied to a bearing outer ring heat treatment apparatus according to any one of claims 1 to 10, characterized by comprising:

step S11, based on the outer ring assembly being positioned on the base assembly, the base assembly conveys the outer ring assembly to a heat treatment position; wherein the heat treatment location comprises a first raceway of the outer ring assembly being located above a second raceway of the outer ring assembly, a first sensing unit of a sensing assembly being adjacent to the first raceway, a second sensing unit of the sensing assembly being adjacent to the second raceway; the included angle between the first rollaway nest and the second rollaway nest is more than 0 degrees and less than 180 degrees;

step S12, based on the outer ring assembly being positioned at the heat treatment position, the base assembly drives the outer ring assembly to rotate around the axis of the outer ring assembly;

step S13, based on the rotation of the outer ring assembly, the induction assembly heats the first roller path and the second roller path;

Step S14, based on the temperatures of the first roller path and the second roller path reaching a first temperature, the induction component stops heating;

and step S15, based on the induction component stopping heating, the first injection hole of the cooling component injects coolant to the first raceway, and the second injection hole of the cooling component injects coolant to the second raceway.