Rectangular tooth induction heating tempering device for end face of automobile differential housing

Abstract

The utility model relates to induction heating equipment technical field discloses a kind of automobile differential shell end surface rectangular tooth induction heating temper induction devices, including inductor bottom plate, two coil supports are equipped on inductor bottom plate, two coil supports are respectively connected with outer circle coil and inner circle coil, outer circle coil and inner circle coil are in the same plane, and outer circle coil and inner circle coil share center. The utility model automobile differential shell end surface rectangular tooth induction heating temper induction device, according to the sharp corner phenomenon of electromagnetic induction heating, realize the temperature of tooth part upper end surface and other parts tends to be consistent, and only need to heat once to meet process requirement.

Description

Technical Field

[0001] This utility model relates to the field of induction heating equipment technology, specifically to an induction heating and tempering induction device for rectangular teeth on the end face of an automotive differential housing. Background Technology

[0002] The rectangular teeth on the end face of the automotive differential housing require induction heating tempering. When tempering the rectangular teeth on the end face after induction heating quenching, the temperature of each tooth on the ring, including the inner, outer, tip, and root, must be consistent. After tempering, the hardness of each tooth must meet the technical requirements.

[0003] With numerous car models and different differentials used in different vehicles, if the differential housing diameter is large and the workpiece is relatively heavy, the general process of induction heating quenching followed by conventional furnace tempering will present the following problems: First, the workpiece diameter is relatively large, and the loading capacity per furnace is limited; Secondly, conventional furnaces have long tempering times, with most tempering times exceeding 2 hours, which is not conducive to large-scale production.

[0004] Taking a type of automotive differential housing as an example, the outer diameter of most of its rectangular teeth on the end face exceeds 100mm, the tooth height is about 10mm, and the difference between the inner and outer diameters of the ring teeth is 15mm to 20mm. After induction hardening, the heating layer depth is basically conformal. Tempering is performed using a quenching coil, which requires multiple pulse heatings. Because it is low-temperature tempering, the tempering temperature is not high, and the temperature difference between the tooth tip and the tooth root is large. After tempering, the hardness of the tooth tip decreases by about 5HRC, while the hardness of the tooth root remains basically unchanged. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of the aforementioned technologies by providing an induction heating and tempering induction device for rectangular teeth on the end face of an automotive differential housing. Based on the sharp-angle phenomenon of electromagnetic induction heating, the temperature of the upper end face of the teeth is made to be more consistent with that of other parts, and only one heating is needed to meet the process requirements.

[0006] To achieve the above objectives, the present invention provides a rectangular tooth induction heating and tempering induction device for the end face of an automotive differential housing, comprising an induction base plate, on which two coil supports are provided, the two coil supports being respectively connected to an outer coil and an inner coil, the outer coil and the inner coil being on the same plane and sharing the same center.

[0007] Preferably, the inner coil is provided with a magnetic conductor.

[0008] Preferably, the magnetic conductor has a U-shaped structure and is horizontally mounted on the inner coil, with the opening of the magnetic conductor facing the outer coil.

[0009] Preferably, the magnetic conductors are arranged in a complete circle along the inner coil.

[0010] Preferably, the opening width of the magnetic conductor is matched with the thickness of the inner coil.

[0011] Preferably, the inner coil and the outer coil are connected to the positive and negative terminals of the power supply, respectively.

[0012] Compared with the prior art, this utility model has the following advantages: 1. By heating with both inner and outer coils simultaneously, and based on the sharp-angle phenomenon of electromagnetic induction heating, the temperature of the upper end face of the tooth is made to be more consistent with that of other parts. 2. Solve the problem of uneven hardness caused by inconsistent temperatures at the tooth tip, tooth root, and inner and outer sides of the tooth during induction tempering of the end face teeth of large-size differential housings, and achieve uniform tempering with a single heating process. 3. Tempering is completed in a single heating cycle, resulting in high processing efficiency; 4. By adjusting the coil oversize, it can be adapted to workpieces with different tooth heights. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the rectangular tooth induction heating and tempering induction device for the end face of the automotive differential housing according to this utility model. Figure 2 for Figure 1 The front view; Figure 3 for Figure 1 Top view; Figure 4 for Figure 1 Schematic diagram of the structure of a medium-conducting magnet; Figure 5 for Figure 1 A schematic diagram of the structure in which the inner coil is fitted with a magnetic conductor.

[0014] The components in the diagram are labeled as follows: Sensor base plate 1, coil bracket 2, outer coil 3, inner coil 4, magnetic conductor 5. Detailed Implementation

[0015] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0016] like Figures 1-5As shown, a rectangular tooth induction heating and tempering induction device for the end face of an automotive differential housing includes an induction base plate 1. Two coil supports 2 are provided on the induction base plate 1. The two coil supports 2 are respectively connected to an outer coil 3 and an inner coil 4. The outer coil 3 and the inner coil 4 are on the same plane and share the same center.

[0017] The inner coil 4 is provided with a magnetic conductor 5. The magnetic conductor 5 has a U-shaped structure and is installed horizontally on the inner coil 4. The opening of the magnetic conductor 5 faces the outer coil 4, and the magnetic conductors 5 are arranged in a complete circle along the inner coil 4.

[0018] In addition, the opening width of the magnetic conductor 5 matches the thickness of the inner coil 4, making it easy to attach the magnetic conductor 5 to the inner coil 4.

[0019] In this embodiment, the inner coil 4 and the outer coil 3 are connected to the positive and negative terminals of the power supply, respectively.

[0020] In this embodiment, the outer diameter of the rectangular teeth on the end face of the differential housing mostly exceeds 100mm, the tooth height is about 10mm, and the difference between the inner and outer diameters of the ring teeth is 15mm to 20mm. After induction hardening, the depth of the heating layer is basically conformal. Originally, a method similar to quenching coils was used for heating and tempering, with multiple pulse heating. Due to the low temperature tempering, the tempering temperature was not high, and the temperature difference between the tooth tip and the tooth root was large. After tempering, the hardness of the tooth tip decreased by about 5HRC, while the hardness of the tooth root remained basically unchanged.

[0021] When the differential housing is tempered using the rectangular tooth induction heating tempering induction device of this embodiment, the annular tooth of the differential housing is placed in the middle of the inner coil 4 and the outer coil 3 for heating. At this time, the upper end face of the inner coil 4 and the outer coil 3 exceeds the end face of the annular tooth. The excess size varies depending on the different workpieces. During heating, the outer coil 3 has a circular magnetic field effect, and the inner coil 4 utilizes the slot effect of the magnetic conductor 5. Based on the sharp corner phenomenon of electromagnetic induction heating, the temperature of the upper end face of the tooth tends to be consistent with other parts.

[0022] This utility model relates to an induction heating and tempering induction device for rectangular teeth on the end face of automotive differential housings. It achieves uniform temperature distribution between the upper end face of the teeth and other parts by simultaneously heating with inner and outer coils, utilizing the sharp-angle phenomenon of electromagnetic induction heating. This solves the problem of uneven hardness caused by inconsistent temperatures at the tooth tip, tooth root, and inner and outer sides during induction tempering of large-sized differential housing end face teeth, enabling uniform tempering in a single heating cycle. Tempering is completed in a single heating cycle, resulting in high processing efficiency. By adjusting the coil oversize, it can be adapted to workpieces with different tooth heights.

[0023] It should be noted that the above description of the technical solutions is exemplary, and this specification may be embodied in different forms and should not be construed as limiting it to the technical solutions set forth herein. Rather, providing these descriptions will ensure that the disclosure of this utility model is thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Furthermore, the technical solutions of this utility model are defined only by the scope of the claims.

[0024] The shapes, dimensions, ratios, angles, and figures disclosed in the description of various aspects of this specification and claims are merely examples, and therefore, this specification and claims are not limited to the details shown. In the following description, detailed descriptions of relevant known functions or configurations will be omitted where it would be determined that they unnecessarily obscure the focus of this specification and claims.

[0025] Finally, it should be noted that the above embodiments are merely representative examples of this utility model. Obviously, this utility model is not limited to the above embodiments and can have many variations. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model should be considered to fall within the protection scope of this utility model.

Claims

1. A rectangular tooth induction heating and tempering induction device for the end face of an automotive differential housing, comprising an induction base plate (1), characterized in that: The sensor base plate (1) is provided with two coil supports (2), and the two coil supports (2) are respectively connected to an outer coil (3) and an inner coil (4). The outer coil (3) and the inner coil (4) are on the same plane, and the outer coil (3) and the inner coil (4) share the same center.

2. The rectangular tooth induction heating and tempering induction device for the end face of the automotive differential housing as described in claim 1, characterized in that: The inner coil (4) is provided with a magnetic conductor (5).

3. The rectangular tooth induction heating and tempering induction device for the end face of the automotive differential housing as described in claim 2, characterized in that: The magnetic conductor (5) has a U-shaped structure and is installed laterally on the inner coil (4). The opening of the magnetic conductor (5) faces the outer coil (3).

4. The rectangular tooth induction heating and tempering induction device for the end face of the automotive differential housing as described in claim 3, characterized in that: The magnetic conductors (5) are arranged in a complete circle along the inner coil (4).

5. The rectangular tooth induction heating and tempering induction device for the end face of the automotive differential housing as described in claim 3, characterized in that: The opening width of the magnetic conductor (5) matches the thickness of the inner coil (4).

6. The rectangular tooth induction heating and tempering induction device for the end face of the automotive differential housing as described in claim 1, characterized in that: The inner coil (4) and the outer coil (3) are connected to the positive and negative terminals of the power supply, respectively.

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