Induction quenching inductor for automobile hub bearing flange

Abstract

The utility model discloses an induction quenching inductor for an automobile hub bearing flange, which relates to the technical field of induction quenching and comprises a contact base and an effective ring, and the effective ring comprises a copper pipe and a magnetizer arranged on the copper pipe. The effective coil is divided into a first section of induction coil, a fourth section of induction coil, a third section of induction coil and a second section of induction coil which are connected in sequence; the copper pipe at the fourth section of the induction coil is an outwards inclined rectangle, and a boss is arranged on the inner side of the bottom of the copper pipe; the copper pipe at the third section of the induction coil is an outwards-inclined profiling rectangle, and a profiling fillet is arranged on one side, opposite to the workpiece channel, of the copper pipe; and the first section of induction coil and the second section of induction coil are respectively connected with the contact base. According to the utility model, the service life is prolonged, and the surface metallographic structure at the sharp corner of the quenched workpiece is 4-level (excellent in metallographic structure).

Description

Technical Field

[0001] The utility model relates to the technical field of induction hardening, and particularly relates to an induction hardening inductor for an automobile hub bearing flange. Background Art

[0002] Induction hardening inductors are widely used in industries such as induction hardening equipment for heating workpieces. At present, there are various inductors on the market, but there are many different defects. For example, during induction hardening, due to the corner effect, the temperature at the flange corners during hardening is higher than other positions, resulting in poor surface metallographic structure. Summary of the Utility Model

[0003] Aiming at the defects existing in the prior art, the purpose of the utility model is to provide an induction hardening inductor for an automobile hub bearing flange, which can extend the service life, and the surface metallographic structure at the corners of the workpiece after hardening is grade 4 (excellent metallographic structure).

[0004] To achieve the above purpose, the technical solution adopted by the utility model is: an induction hardening inductor for an automobile hub bearing flange, including a contact base and an effective coil. The effective coil includes a copper tube and a magnetic conductor arranged on the copper tube. The effective coil is divided into a first induction coil, a fourth induction coil, a third induction coil, and a second induction coil that are connected in sequence. The copper tube at the fourth induction coil is an outwardly inclined rectangle, and a convex platform is arranged on the inner side of the bottom of the copper tube. The copper tube at the third induction coil is an outwardly inclined profile rectangle, and a profile fillet is arranged on the side of the copper tube opposite to the workpiece groove. The first induction coil and the second induction coil are respectively connected to the contact base.

[0005] Further improvement lies in that: an opening is arranged at the upper end of the copper tube at the fourth induction coil, and a sealing copper sheet is arranged at the opening.

[0006] Further improvement lies in that: the magnetic conductor at the fourth induction coil completely surrounds the copper tube facing the workpiece corner.

[0007] Further improvement lies in that: the inclination angle of the copper tube at the fourth induction coil is 60°, and the inclination angle of the copper tube at the third induction coil is 45°.

[0008] Further improvement lies in that: the ratio of the profile fillet radius R1 of the copper tube at the third induction coil to the workpiece groove radius R2 is R1:R2 = 4:7.

[0009] Further improvement lies in that: the height of the convex platform is 1 mm.

[0010] Further improvement lies in that: the magnetic conductor is made of silicon steel sheets.

[0011] A further improvement is that it also includes a return pipe, a first connecting section is arranged between the fourth section induction coil and the third section induction coil, and the return pipe is connected to the first connecting section.

[0012] Further improvements are: the contact base includes two fixed side plates, two power supply plates and two water inlet pipes; the two fixed side plates are fixed together by insulating fasteners and separated by an insulating sheet in the middle; the two power supply plates are respectively welded to the corresponding fixed side plates; the two water inlet pipes are welded to the corresponding fixed side plates and the power supply plates.

[0013] A further improvement is that the first section of the induction coil is connected to one of the water inlet pipes through the second connecting section, and the second section of the induction coil is connected to the other water inlet pipe through the third connecting section.

[0014] The beneficial effects of the utility model are:

[0015] Compared with the traditional copper tube bending, the induction coil made by machining can achieve more complex and efficient shapes. The bottom of the fourth section of the copper tube adopts a 1mm boss to make the current more concentrated on the bottom surface with a larger area. At the same time, since the outer side of the bottom surface of the flange needs to be drilled, the bottom surface cannot be heated over a large area. The boss can reduce the induction area, and at the same time ensure that the copper tube has sufficient width to have sufficient water flow, thereby increasing the life of the sensor. The magnetic conductor of the fourth section of the induction coil completely covers the side close to the sharp corner, reducing the induced current of the copper tube near the sharp corner, thereby weakening the sharp corner effect. The outward inclination angle of the copper tube is 60°. The third section of the induction coil is an inclined profiling with an inclination angle of 45 degrees. The profiling method is used on the side facing the channel. When the profiling fillet diameter R1:R2=4:7, the gap between the induction coil and the workpiece is 2.5mm. At this time, the induction coil will not heat the sharp corner too much, and the channel hardening layer depth is appropriate. At this time, the surface metallographic structure of the sharp corner after quenching is level 4 (excellent metallographic structure).

[0016] After adding the return pipe, the water flow rate under the same pressure changes from 35L / min to 45L / min. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the induction quenching sensor for the automobile hub bearing flange in the embodiment of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the contact base in the embodiment of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the effective circle in the embodiment of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the fourth section of the induction coil in the embodiment of the utility model;

[0021] Figure 5 This is the working schematic diagram of the effective turns in the embodiment of the present utility model.

[0022] Reference numerals:

[0023] 1 - Contact base; 11 - Power supply electrode plate; 12 - Fixed side plate; 13 - Insulating sheet; 14 - Insulating fastener; 15 - Water inlet pipe;

[0024] 2 - Effective turns; 201 - Copper tube; 202 - Magnetoconductive body; 203 - First induction coil; 204 - Second induction coil; 205 - Third induction coil; 206 - Fourth induction coil; 207 - First connection section; 208 - Second connection section; 209 - Third connection section; 210 - Boss; 211 - Sealing copper sheet; 212 - Profiled fillet;

[0025] 3 - Water return pipe. Detailed implementation manners

[0026] The embodiments of the present utility model will be described in detail below. The illustrated embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout denote the same or similar elements or elements having the same or similar functions.

[0027] In the description of the present utility model, it should be noted that for the orientation terms, such as the terms "center", "transverse (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the indicated orientation and position relationships are based on the orientation or position relationships shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of the present utility model.

[0028] In addition, for the terms "first" and "second", they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meanings of "several" and "a number of" are two or more, unless otherwise specifically defined.

[0029] The following further describes the specific implementation manners of the present utility model in conjunction with the accompanying drawings of the specification, making the technical solutions and their beneficial effects of the present utility model clearer and more definite. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present utility model, and should not be construed as limiting the present utility model.

[0030] See Figure 1 and Figure 3 As shown, an induction hardening inductor for an automotive wheel hub bearing flange provided by an embodiment of the present utility model includes a contact base 1 and an effective coil 2. The effective coil 2 includes a copper tube 201 and a magnetic conductor 202 provided on the copper tube 201. Specifically, the magnetic conductor 202 is made of silicon steel sheets. The effective coil 2 is divided into a first induction coil 203, a fourth induction coil 206, a third induction coil 205, and a second induction coil 204 that are connected in sequence. Specifically, it further includes a water return pipe 3. A first connection section 207 is provided between the fourth induction coil 206 and the third induction coil 205, and the water return pipe 3 is communicated with the first connection section 207.

[0031] See Figure 4 As shown, the copper tube 201 at the fourth induction coil 206 is an outwardly inclined rectangle, and a boss 210 is provided on the inner side of the bottom of the copper tube 201. Specifically, an opening is provided at the upper end of the copper tube 201 at the fourth induction coil 206, and a sealing copper sheet 211 is provided at the opening. The magnetic conductor 202 at the fourth induction coil 206 completely surrounds the copper tube 201 facing the workpiece sharp corner. The inclination angle of the copper tube 201 at the fourth induction coil 206 is 60°, and the inclination angle of the copper tube 201 at the third induction coil 205 is 45°. The height of the boss 210 is 1 mm.

[0032] See Figure 5 As shown, the copper tube 201 at the third induction coil 205 is an outwardly inclined profiled rectangle, and a profiled fillet 212 is provided on the side of the copper tube 201 opposite to the workpiece groove. Specifically, the ratio of the radius R1 of the profiled fillet 212 of the copper tube 201 at the third induction coil 205 to the radius R2 of the workpiece groove is R1:R2 = 4:7.

[0033] The first induction coil 203 and the second induction coil 204 are respectively connected to the contact base 1.

[0034] See Figure 2 As shown, the contact base 1 includes two fixed side plates 12, two power supply plates 11, and two water inlet pipes 15. The two fixed side plates 12 are fixed together by insulating fasteners 14 and separated by an insulating sheet 13 in the middle. The two power supply plates 11 are respectively welded to the corresponding fixed side plates 12. The two water inlet pipes 15 are welded to the corresponding fixed side plates 12 and power supply plates 11. Specifically, the first induction coil 203 is connected to one of the water inlet pipes 15 through a second connection section 208, and the second induction coil 204 is connected to the other water inlet pipe 15 through a third connection section 209.

[0035] For the induction coil at the channel and sharp corner, the fourth section uses copper as the raw material, which has good electrical conductivity and thermal conductivity. Through machining, an open copper tube is obtained. The open end is sealed with a sealing copper sheet by welding.

[0036] 1 The fourth-section copper tube is an outward-tilted rectangle with an inclination angle of 60° (the angle with the axis). At this time, the distance between the copper tube and the sharp corner is the most appropriate.

[0037] 2 The third-section copper tube is an outward-tilted profiled rectangle. The inclination angle is 45° (the angle with the axis). The ratio of the radius R1 of the profiled rounded corner R1 facing the channel to the radius R2 of the workpiece channel is R1:R2 = 4:7.

[0038] 3 The fourth-section induction coil has a 1-mm boss facing the bottom. This makes the current concentrate at the boss, and the current concentration acts on the larger bottom area.

[0039] 4 Silicon steel sheets are used as the magnetic conductor to completely surround the copper tube facing the sharp corner, keeping the induced current away from the sharp corner side.

[0040] 5 By adding a water return pipe in the cooling circuit of the entire effective coil, the water flow rate is increased, and the service life is extended.

[0041] In the description of the specification, the descriptions with reference to terms such as "one embodiment", "preferably", "example", "specific example", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. The schematic expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0042] Through the description of the above structures and principles, those skilled in the art should understand that the present invention is not limited to the above specific implementation manners. Improvements and substitutions using well-known technologies in the art based on the present invention fall within the protection scope of the present invention, which should be defined by each claim.

Claims

1. An induction hardening inductor for an automotive wheel hub bearing flange, comprising a contact base (1) and an effective coil (2), characterized in that: The effective coil (2) includes a copper tube (201) and a magnetic conductor (202) disposed on the copper tube (201). The effective coil (2) is divided into a first induction coil (203), a fourth induction coil (206), a third induction coil (205), and a second induction coil (204) that are connected in sequence. The copper tube (201) at the fourth induction coil (206) is a rectangular shape with an outward inclination, and a boss (210) is provided on the inner side of the bottom of the copper tube (201). The copper tube (201) at the third induction coil (205) is a profiled rectangular shape with an outward inclination, and a profiled fillet (212) is provided on the side of the copper tube (201) opposite to the workpiece channel. The first induction coil (203) and the second induction coil (204) are respectively connected to the contact base (1).

2. The induction hardening inductor for the flange of an automotive wheel bearing according to claim 1, wherein: An opening is provided at the upper end of the copper tube (201) at the fourth induction coil (206), and a sealing copper sheet (211) is provided at the opening.

3. The induction hardening inductor for the flange of an automotive wheel bearing according to claim 1, wherein: The magnetic conductor (202) at the fourth induction coil (206) completely surrounds the copper tube (201) facing the workpiece sharp corner.

4. The induction hardening inductor for the flange of an automotive wheel hub bearing according to claim 1, wherein: The inclination angle of the copper tube (201) at the fourth induction coil (206) is 60°, and the inclination angle of the copper tube (201) at the third induction coil (205) is 45°.

5. The induction hardening inductor for the flange of an automotive wheel hub bearing according to claim 1, wherein: The ratio of the radius R1 of the profiled fillet (212) of the copper tube (201) at the third induction coil (205) to the radius R2 of the workpiece channel is R1:R2 = 4:

7.

6. The induction hardening inductor for the flange of an automotive wheel hub bearing according to claim 1, characterized in that: The height of the boss (210) is 1 mm.

7. The induction hardening inductor for the flange of an automotive wheel hub bearing according to claim 1, wherein: The magnetic conductor (202) is made of silicon steel sheets.

8. The induction hardening inductor for the flange of an automotive wheel hub bearing according to claim 1, wherein: It further includes a return water pipe (3). A first connection section (207) is provided between the fourth induction coil (206) and the third induction coil (205), and the return water pipe (3) is communicated with the first connection section (207).

9. The induction hardening inductor for the flange of an automotive wheel hub bearing according to claim 1, wherein: The contact base (1) includes two fixed side plates (12), two power supply electrodes (11), and two water inlet pipes (15); the two fixed side plates (12) are fixed together by insulating fasteners (14) and are separated by an insulating sheet (13) in the middle; the two power supply electrodes (11) are respectively welded to the corresponding fixed side plates (12); the two water inlet pipes (15) are welded to the corresponding fixed side plates (12) and power supply electrodes (11).

10. The induction hardening inductor for the flange of an automotive wheel hub bearing according to claim 9, characterized in that: The first induction coil (203) is connected to one of the water inlet pipes (15) through a second connection section (208), and the second induction coil (204) is connected to the other water inlet pipe (15) through a third connection section (209).

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