Double-ring quenching inductor for high-strength bolt

Abstract

The utility model relates to the technical field of quenching processing, in particular to a double-ring quenching inductor for a high-strength bolt, which comprises an inductor base and a wheel bolt, the inductor base comprises two fixed plates and a connecting pipe, the two fixed plates are oppositely arranged, the bottom of each fixed plate is provided with a water inlet / outlet hole, and the connecting pipe is connected with the two fixed plates. A connecting pipe is arranged on the outer side of the fixing plate, a double-circle induction coil is arranged above the connecting pipe and comprises a first induction strip, a second induction strip, a third induction strip, an arc-shaped semi-opening induction opening and a magnetizer, compared with the prior art, the strength of the bolt can be improved, the tool is simple in structure and use mode, two parts can be machined at a time, and the machining efficiency is improved. And the high-strength bolt can meet the high-limit production requirement and can be suitable for high-frequency disassembly.

Description

Technical Field

[0001] The utility model relates to the technical field of quenching processing, and specifically relates to a double-loop quenching inductor for high-strength bolts. Background Art

[0002] High-strength bolts are applied in many industries such as automobiles, construction machinery, agricultural machinery, and mining equipment. The application range is very wide and the demand is particularly large. However, many existing high-strength bolt nuts are not quenched. After the raw materials are quenched and tempered or normalized, the finished products are directly used. Such bolts are prone to deformation during disassembly, affecting repeated use and having a high replacement frequency. Summary of the Invention

[0003] In order to overcome the deficiencies of the prior art, the utility model provides a double-loop quenching inductor for high-strength bolts. After the nut part of the bolt is subjected to induction quenching process, the strength of the bolt is improved, the service life of the bolt is greatly increased, the replacement frequency is reduced, and through the design of the double-loop inductor, the quenching of two high-strength bolts can be carried out simultaneously, with high processing efficiency.

[0004] To achieve the above object, a double-loop quenching inductor for high-strength bolts includes an inductor base and wheel bolts. The inductor base includes fixing plates and connecting pipes. There are two fixing plates, which are arranged opposite to each other. Each of the two fixing plates is provided with an inlet and outlet hole at the bottom. A connecting pipe is arranged outside the fixing plate. A double-loop induction coil is arranged above the connecting pipe. The double-loop induction coil includes induction strip one, induction strip two, induction strip three, arc-shaped semi-open induction port, and magnetic conductor. The left and right induction strip twos are respectively connected to the connecting pipes on both sides. The upper end of the outer arc-shaped semi-open induction port is connected to one end of the outer arc-shaped semi-open induction port. The other end of the outer arc-shaped semi-open induction port is connected to the upper end of the inner arc-shaped semi-open induction port through induction strip three. The lower ends of the inner arc-shaped semi-open induction ports are connected through induction strip one. A magnetic conductor is arranged on one side of the arc-shaped semi-open induction port.

[0005] The wheel bolt is arranged inside the arc of the arc-shaped semi-open induction port.

[0006] The connecting pipe and the double-loop induction coil are hollow pipes and are interconnected.

[0007] The induction strip one, induction strip two, and induction strip three are respectively perpendicularly connected to the arc-shaped semi-open induction port, and the overall structure of the double-loop induction coil is in a U-shaped structure.

[0008] An insulating plate is arranged between the two fixing plates.

[0009] The fixing plate and the insulating plate are connected by bolts and nuts.

[0010] Through holes for bolts to pass through are arranged on the fixing plate and the insulating plate.

[0011] Compared with the prior art, the utility model can improve the strength of the bolt, and the tooling structure is simple, the usage method is simple, two parts can be processed at one time, which can meet the high-volume production needs and can be applicable to high-strength bolts with high-frequency disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic structural diagram of the utility model.

[0013] Figure 2 It is an overall top view of the utility model.

[0014] Figure 3 It is a top view of the utility model.

[0015] Figure 4 It is a side view of the utility model.

[0016] Figure 5 It is a schematic diagram of a double-loop induction coil.

[0017] Figure 6 It is a working state diagram of the utility model.

[0018] See Figures 1 to 6 , 1 is a fixed plate, 2 is a connecting pipe, 3 is a bolt, 4 is a nut, 5 is a wheel bolt, 6 is a magnetic conductor, 7 is a double-loop induction coil, 8 is an arc-shaped semi-open induction port, 9.1 is induction strip one, 9.2 is induction strip two, 9.3 is induction strip three, 10 is an insulating plate, 11 is a through hole, and 12 is a water inlet / outlet hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following further describes the utility model with reference to the drawings.

[0020] As Figure 1 shown, the inductor base includes a fixed plate 1 and a connecting pipe 2. There are two fixed plates 1, and the two fixed plates 1 are arranged oppositely. The fixed plate 1 increases the stability of the induction coil. Each of the bottoms of the two fixed plates 1 is provided with a water inlet / outlet hole 12. One side of the water inlet / outlet hole 12 is responsible for connecting high-pressure water, and the other side of the water inlet / outlet hole 12 is responsible for discharging high-pressure water. A connecting pipe 2 is provided outside the fixed plate 1. The connecting pipe 2 is made of copper tubing. Copper tubing has good heat conduction and electrical conductivity and is a good quenching material. As Figure 6As shown in the figure, a double-loop induction coil 7 is provided above the connecting pipe 2. The double-loop induction coil 7 includes an induction strip one 9.1, an induction strip two 9.2, an induction strip three 9.3, an arc-shaped semi-open induction port 8, and a magnetic conductor 6. The left and right induction strips two 9.2 are respectively connected to the connecting pipes 2 on both sides. Above the outer ends of the two induction strips two 9.2, one end of the outer arc-shaped semi-open induction port 8 is connected. For the arc-shaped semi-open induction port 8, the other end of the outer arc-shaped semi-open induction port 8 is connected to the upper end of the inner arc-shaped semi-open induction port 8 through the induction strip three 9.3. The lower ends of the inner arc-shaped induction sensors 8 are connected through the induction strip one 9.1. A magnetic conductor 6 is provided on one side of the arc-shaped semi-open induction port 8. Through the connection of the induction strip one 9.1, the induction strip two 9.2, the induction strip three 9.3, the arc-shaped semi-open induction port 8, and the magnetic conductor 6, the present utility model can form double-loop induction coils 7 on both sides while forming an induction route, improving the induction efficiency and stability.

[0021] A wheel bolt 5 is provided inside the arc of the arc-shaped semi-open induction port 8. The quenching of the wheel bolt 5 is mainly carried out on the nut part. The semi-open setting of the arc-shaped semi-open induction port 8 also fits better with the nut of the wheel bolt 5. As Figure 3 shown, the arc-shaped semi-open induction port 8 is arc-shaped, concentrating the current density on the inner side of the arc opening, significantly affecting the heating efficiency.

[0022] The connecting pipe 2 and the double-loop induction coil 7 are hollow pipes and are interconnected. The hollow pipe structure enables high-pressure water to flow through the entire inductor.

[0023] The induction strip one 9.1, the induction strip two 9.2, and the induction strip three 9.3 are respectively perpendicularly connected to the arc-shaped semi-open induction port 8. The induction strip structure of the double-loop induction coil 7 concentrates the current on the inner side of the conductor. As Figure 4 shown, the overall structure of the double-loop induction coil 7 is in a U-shaped structure, concentrating the high-frequency current at the opening of the double-loop induction coil, making the quenching more uniform.

[0024] An insulating plate 10 is provided between the fixing plates 1. The insulating plate 10 is made of a polytetrafluoroethylene plate.

[0025] The fixing plates 1 and the insulating plate 10 are connected by bolts 3 and nuts 4. The bolts 3 are nylon bolts, and the nuts 4 are brass nuts. The nylon bolts have good insulation performance and do not conduct electricity. The brass nuts have good anti-vibration and anti-loosening effects, are not easy to rust, are corrosion-resistant, and have good heat conduction, and can well adapt to high-temperature environments.

[0026] Through holes 11 for the bolts 3 to pass through are provided on the fixing plates 1 and the insulating plate 10.

[0027] The implementation principle of the present utility model is as follows. Technicians connect the fixing plate 1 and the insulating plate 10 through bolts 3 and nuts 4. Connecting pipes 2 are installed on both sides of the two fixing plates 1. Two second induction bars 9.2, two arc semi-open induction ports 8, two third induction bars 9.3, two arc semi-open induction ports 8, and the first induction bar 9.1 are connected in sequence to form a double-loop induction coil 7. The arc-shaped induction coils 7 on both sides ensure a larger induction space, and more concentrated heating can be achieved through the double-loop induction coil 7, making the quenching more complete. At the same time, a magnetic conductor 6 is provided on one side of the arc semi-open induction port of the double-loop induction coil 7. The magnetic conductor 6 forms a notch effect. Generally, silicon steel sheets are selected for the magnetic conductor 6, which can improve the induction efficiency, shield the magnetic fields in other directions outside the induction coil, and achieve more concentrated heating. The arc-shaped structure of the arc-shaped induction coil 7 also better conforms to the quenching environment required for the arc-shaped part at the top of the nut of the wheel bolt 5, which can improve production efficiency. When the workpiece is quenched, high-pressure water enters the connecting pipe 2 through the water inlet and outlet holes 12 on one side of the inductor base, then enters the arc semi-open induction port 8 on one side through the second induction bar 9.2 on one side, flows through the third induction bar 9.3 on one side, the first induction bar 9.1, the third induction bar 9.3 on the other side, enters the arc semi-open induction port 8 on the other side, and then passes through the second induction bar 9.2 on the other side and the connecting pipe 2, and flows back to the water tank from the other water inlet and outlet hole 12 of the inductor base. The connecting pipe 2 and multiple induction bars play the role of conducting electricity and cooling the entire inductor through water. The entire quenching process is simple and efficient, which not only reduces the enterprise cost but also meets the strength and production quantity requirements of the bolt 5.

Claims

1. A double-circle quenching sensor for high-strength bolts, comprising a sensor base and a wheel bolt, characterized in that: The sensor base comprises a fixing plate (1) and a connecting pipe (2). The fixing plates (1) are provided with two, the two fixing plates (1) are arranged opposite to each other, the bottom of the two fixing plates (1) are respectively provided with a water inlet and outlet hole (12), the outside of the fixing plate (1) is provided with a connecting pipe (2), and a double-circle induction coil (7) is provided above the connecting pipe (2), the double-circle induction coil (7) comprises an induction strip 1 (9.1), an induction strip 2 (9.2), an induction strip 3 (9.3), an arc-shaped semi-open induction port (8), and a magnetic conductor (6 ), the left and right two sensing strips 2 (9.2) are respectively connected to the connecting tubes (2) on both sides, the upper ends of the outer ends of the two sensing strips 2 (9.2) are connected to one end of the outer arc-shaped semi-open sensing port (8), the other end of the outer arc-shaped semi-open sensing port (8) is connected to the upper end of the inner arc-shaped semi-open sensing port (8) through the sensing strip 3 (9.3), and the lower ends of the inner arc-shaped semi-open sensing ports (8) are connected through the sensing strip 1 (9.1), and a magnetic conductor (6) is provided on one side of the arc-shaped semi-open sensing port (8).

2. A double-turn quenching sensor for high-strength bolts according to claim 1, characterized in that: A wheel bolt (5) is arranged in the arc of the arc-shaped semi-open sensing port (8).

3. The double-turn quenching sensor for high-strength bolts according to claim 1, characterized in that: The connecting pipe (2) and the double-turn induction coil (7) are hollow pipes and are interconnected.

4. The double-turn quenching sensor for high-strength bolts according to claim 1, characterized in that: The first sensing strip (9.1), the two second sensing strips (9.2), and the two third sensing strips (9.3) are respectively vertically connected to the arc-shaped semi-open sensing port (8), and the overall structure of the double-circle sensing coil (7) is a U-shaped structure.

5. The double-turn quenching sensor for high-strength bolts according to claim 1, characterized in that: An insulating plate (10) is provided between the two fixing plates (1).

6. The double-turn quenching sensor for high-strength bolts according to claim 1, characterized in that: The fixing plate (1) and the insulating plate (10) are connected via bolts (3) and nuts (4).

7. The double-turn quenching sensor for high-strength bolts according to claim 1, characterized in that: The fixing plate (1) and the insulating plate (10) are provided with through holes (11) for the bolts (3) to pass through.

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