Induction coil suitable for quenching of shaft levers with different diameters

Abstract

The utility model relates to the technical field of induction quenching processing, in particular to an induction coil suitable for quenching shaft levers with different diameters, which comprises a coil base, the coil base is formed by assembling adjacent sub-seats in a mirror image manner, hollow parts are fixedly mounted on the sub-seats, and channels are formed in the sub-seats; insulation sheets are fixedly installed between the adjacent installation blocks and the branch seats, multiple sets of effective rings are installed at one ends of the installation blocks, and annular cavities communicated with the channels are formed in the effective rings. The middle of the interior of the coil base is separated by the insulating sheet, a channel is formed in the coil base and the front annular effective coil, and water flows through the branch base, so that the effective coil is conveniently cooled by internal cooling water during induction heating, and when the effective coil is matched with quenching equipment to heat workpieces with different diameters, the front-back position of the effective coil is changed; meanwhile, a plurality of groups of effective rings are arranged in the hollow part, so that the heating uniformity is improved, and the induction quenching device is suitable for diameter shaft rods with different thicknesses.

Description

Technical Field

[0001] The utility model relates to the technical field of induction hardening processing, in particular to an induction coil suitable for quenching shafts with different diameters. Background Art

[0002] The center shaft of the automobile's constant velocity drive shaft needs to transmit the engine torque. The surface induction quenching heat treatment method is used to meet the strength and toughness requirements. The quenching equipment uses a circular induction coil to perform induction scanning heating on the workpiece from one end to the other. The workpiece is in the middle of the circular coil and is driven to rotate by the driving tip. After heating, it is cooled by the quenching liquid sprayed from the built-in spray ring to complete the quenching process.

[0003] The induction coil in the prior art 201120159235.7, through the coil part of the small coil inside the large coil and the two adjacent coils being the spiral coil parts with the same diameter and a large lead angle, can be used for this stepped shaft quenching induction coil for shafts with large diameter transitions, to obtain uniform heating in the diameter transition zone during induction heating, so that the subsequent quenching quality is guaranteed.

[0004] The above structure is suitable for shafts of different diameters, but it is easy to cause a large gap between the induction coil and the workpiece. At present, some workpieces have different shapes, and the corresponding inner diameter induction coil can only be designed according to the maximum diameter of the workpiece. It cannot meet the needs of workpieces of different diameters, and is not suitable for shafts of different thicknesses, resulting in uneven heating. Utility Model Content

[0005] In view of this, the purpose of the utility model is to propose an induction coil suitable for quenching shafts of different diameters, so as to solve the problem that the induction coil cannot meet the needs of workpieces of different diameters, is not suitable for shafts of different thicknesses, and does not heat evenly.

[0006] Based on the above purpose, the utility model provides an induction coil suitable for quenching shafts of different diameters, including a coil base, which is assembled by mirroring adjacent sub-seats, a hollow part is fixedly installed on the sub-seat, and a channel is opened inside the sub-seat; a mounting block is fixedly installed on one side of the sub-seat, and an insulating sheet is fixedly installed between the adjacent mounting blocks and the sub-seat; a plurality of groups of effective circles are installed at one end of the mounting block, the effective circle is an 8-shaped structure, and an annular cavity connected to the channel is opened inside the effective circle, and a bus is formed between the channel, the effective circle and the annular cavity.

[0007] Preferably, the effective coil is formed by welding a first coil and a second coil, and there are at least two groups of effective coils. The effective coil, the hollow part and the coil base are all made of copper tube.

[0008] Preferably, the inner diameter of the first coil is 32.8 mm, and the inner diameter of the second coil is 43 mm.

[0009] Preferably, stainless steel bolts are installed inside the protrusions, and fixing bolts are installed between adjacent sub-seats.

[0010] Preferably, the sub-seat is an L-shaped structural member, and the angle of the channel opened in the sub-seat is an obtuse angle.

[0011] Preferably, the thickness of the insulating sheet is 2 mm, and the shape of the insulating sheet is stepped, and the insulating sheet matches the cross-sectional surfaces of the mounting block and the sub-seat.

[0012] The beneficial effects of the utility model are as follows: the coil base is separated by an insulating sheet in the middle, and there is a channel inside the coil base and the front annular effective circle, through which water flows inside the base, so that the internal cooling water can cool down the effective circle during induction heating; when the effective circle cooperates with the quenching equipment to heat workpieces of different diameters, the front and rear positions of the effective circle are changed, and the induction quenching of workpieces of different diameters is suitable. At the same time, the multiple groups of effective circles in the hollow part improve the uniformity of heating, and are suitable for shafts of different diameters of thickness, and then the appropriate heating power and scanning speed are matched to complete the induction quenching process. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model from top view;

[0015] Figure 2 It is a schematic diagram of the overall side view of the utility model;

[0016] Figure 3 It is a front view structural schematic diagram of the entire utility model.

[0017] The markings in the figure are: 1. coil base; 2. hollow part; 3. mounting block; 4. channel; 5. effective circle; 6. bump; 7. fixing bolt; 8. stainless steel bolt; 9. annular cavity; 10. first coil; 11. second coil; 12. insulating sheet; 13. sub-seat. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0019] like Figure 1 , Figure 2 and Figure 3 As shown, an induction coil suitable for quenching shafts of different diameters comprises a coil base 1, which is assembled by mirroring adjacent sub-seats 13, on which a hollow part 2 is fixedly mounted, and inside which a channel 4 is provided; a mounting block 3 is fixedly mounted on one side of the sub-seat 13, and between which an insulating sheet 12 is fixedly mounted; a plurality of effective coils 5 are mounted at one end of the mounting block 3, and the effective coils 5 are of an 8-shaped structure, and inside which an annular cavity 9 communicating with the channel 4 is provided, and a bus is formed between the channel 4, the effective coils 5 and the annular cavity 9.

[0020] In this embodiment, the coil base 1 is separated by an insulating sheet 12 in the middle, and there is a channel 4 inside the coil base 1 and the front annular effective circle 5. Water flows through the internal seat 13, which is convenient for the internal cooling water to cool the effective circle 5 during induction heating. When the effective circle 5 of the 8-shaped structure cooperates with the quenching equipment to heat workpieces of different diameters, the front and rear positions of the effective circle 5 are changed, which is suitable for induction quenching of workpieces of different diameters. At the same time, the multiple groups of effective circles 5 in the hollow part 2 improve the uniformity of heating and are suitable for shafts of different diameters. Then, the appropriate heating power and scanning speed are matched to complete the induction quenching process.

[0021] As an implementation method, Figure 1 , Figure 2 As shown, the effective coil 5 is formed by welding the first coil 10 and the second coil 11, and the effective coil 5 is at least two groups, and the effective coil 5, the hollow part 2 and the coil base 1 are all made of copper tube.

[0022] In this embodiment, the front and rear positions of the induction coils are changed when heating workpieces of different diameters through the effective ring 5 in cooperation with the quenching equipment, so that the same induction coil can be used for induction quenching of workpieces of different diameters; at the same time, multiple groups of effective rings 5 ​​enable the material to be heated more quickly, improve the uniformity of heating, and be suitable for shafts of different diameters.

[0023] As an implementation method, Figure 1 As shown, the inner diameter of the first coil 10 is 32.8 mm, and the inner diameter of the second coil 11 is 43 mm.

[0024] In this embodiment, annular rings with an inner diameter of 43 mm and an inner diameter of 32.8 mm are respectively formed by processing a copper tube and welded together. The interior of the copper tube is completely connected to form a complete effective ring 5. During the production process, a 32.8 mm first coil 10 is used to heat the thinner part of the workpiece, and when processing the thicker part, the processing program changes the front and rear positions of the induction coil so that the workpiece is in the middle of the 43 mm second coil 11, and different diameter shafts are used to maintain the gap between the coil and the workpiece.

[0025] As an implementation method, Figure 2 and Figure 3 As shown, a stainless steel bolt 8 is installed inside the protrusion 6, and fixing bolts 7 are installed between adjacent sub-seats 13.

[0026] In this embodiment, the connection parts of multiple groups of effective coils 5 are connected by stainless steel bolts 8, and the sub-seats 13 are connected by fixing bolts 7, forming a symmetrical double-coil structure, providing greater heating power, enabling it to heat the material more quickly and improve the uniformity of heating.

[0027] As an implementation method, Figure 2 and Figure 3 As shown, the sub-seat 13 is an L-shaped structural member, and the angle of the channel 4 opened in the sub-seat 13 is an obtuse angle.

[0028] In this embodiment, there is a channel 4 through the channel 4 and the inside of the front annular effective circle. Water flows into through the channel 4 at one end of the sub-seat 13, passes through the hollow part 2 and the inside of the environmental protection cavity 9 in the effective circle 5, and is discharged through the channel 4 at the other end of the sub-seat 13. One in and one out, it is convenient for the internal cooling water to cool the induction coil during induction heating.

[0029] Among them, the thickness of the insulating sheet 12 is 2 mm, and the shape of the insulating sheet 12 is stepped. The insulating sheet 12 matches the cross-sectional surface of the mounting block 3 and the sub-seat 13 to ensure that the insulating sheet 12 is located between the mounting block 3 and the sub-seat 13 to prevent the effective coil 5 from generating current on the coil base 1 after the current enters.

[0030] Working principle: When in use, the coil base 1 is separated by an insulating sheet 12 in the middle, and there is a channel 4 inside the front annular effective circle. Water flows into through the channel 4 at one end of the sub-seat 13, passes through the hollow part 2 and the environmental protection cavity 9 in the effective circle 5, and then is discharged through the channel 4 at the other end of the sub-seat 13. One in and one out, it is convenient for the internal cooling water to cool the induction coil during induction heating.

[0031] When the effective circle 5 of the figure-8 structure cooperates with the quenching equipment to heat workpieces of different diameters, the front and rear positions of the effective circle 5 are changed to be suitable for induction quenching of workpieces of different diameters. At the same time, the multiple groups of effective circles 5 in the hollow part 2 improve the uniformity of heating and are suitable for shafts of different diameters of thickness. Then, the appropriate heating power and scanning speed are matched to complete the induction quenching process.

[0032] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0033] The utility model is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. An induction coil suitable for quenching shafts of different diameters, comprising a coil base (1), characterized in that: The coil base (1) is assembled by mirroring adjacent sub-seats (13); a hollow part (2) is fixedly mounted on the sub-seat (13), and a channel (4) is provided inside the sub-seat (13); a mounting block (3) is fixedly mounted on one side of the sub-seat (13), and an insulating sheet (12) is fixedly mounted between the adjacent mounting block (3) and the sub-seat (13); a plurality of groups of effective coils (5) are mounted on one end of the mounting block (3), the effective coils (5) are of an 8-shaped structure, and an annular cavity (9) is provided inside the effective coils (5) and is connected to the channel (4), and a busbar is formed between the channel (4), the effective coils (5) and the annular cavity (9).

2. The induction coil suitable for quenching shafts of different diameters according to claim 1, characterized in that: The effective coil (5) is formed by welding a first coil (10) and a second coil (11), and the effective coil (5) is at least two groups. The effective coil (5), the hollow part (2) and the coil base (1) are all made of copper tube.

3. The induction coil suitable for quenching shafts of different diameters according to claim 2, characterized in that: The inner diameter of the first coil (10) is 32.8 millimeters, and the inner diameter of the second coil (11) is 43 millimeters.

4. The induction coil suitable for quenching shafts of different diameters according to claim 1, characterized in that: Fixing bolts (7) are installed between adjacent sub-seats (13).

5. The induction coil suitable for quenching shafts of different diameters according to claim 1, characterized in that: The sub-seat (13) is an L-shaped structural component, and the angle of the channel (4) provided in the sub-seat (13) is an obtuse angle.

6. The induction coil suitable for quenching shafts of different diameters according to claim 1, characterized in that: The thickness of the insulating sheet (12) is 2 millimeters, and the shape of the insulating sheet (12) is stepped, and the insulating sheet (12) matches the cross-sectional surfaces of the mounting block (3) and the sub-seat (13).

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