Induction quenching device for valve tappet ball socket

Abstract

The utility model relates to the technical field of valve tappet processing, in particular to an induction quenching device for a valve tappet ball socket, which comprises a quenching inductor, a ball socket and a ball socket, and the magnetizer is sleeved outside the induction coil at the head part and is provided with a receding through groove with an opening facing the bottom of the ball socket, and part of the induction coil at the head part is exposed from the receding through groove. Due to the fact that the receding through groove is formed in the position, corresponding to the bottom face of the ball socket, of the magnetizer, induction energy on the surface of the ball socket cannot be concentrated to the bottom of the ball socket in the heating process, the phenomenon that excessive heat is absorbed by the bottom of the ball socket is avoided, and the phenomenon that a hardened layer at the bottom of the ball socket is too thick or a sharp corner of an oil through hole is burnt is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve tappet processing technical field, concretely relates to a valve tappet ball socket induction quenching device. BACKGROUND

[0002] Induction quenching is through the control eddy current generated by electromagnetic induction, utilizes skin effect and proximity effect to accurately control heating area, and passes through the magnetic body optimization magnetic field distribution to improve heating efficiency and uniformity, realizes the local hardening treatment of workpiece. The magnetic body is the auxiliary element in high-frequency quenching inductor, and its main role is to increase the induction energy transmission efficiency of induction coil, makes induction energy more concentrated and uniformly acts on the workpiece surface, and avoids the interference and influence of induction coil to workpiece, thereby enhancing quenching effect.

[0003] However, at present, when the valve tappet ball socket is induction quenched, generally, no magnetic body is adopted, or profiled magnetic body is adopted, that is, according to the shape of the ball socket, the magnetic body similar to the shape of the ball socket is adopted, and the disadvantage of this scheme is that the hardening area thickness of the surface of the ball socket is not uniform, the hardening layer is thin at the opening of the ball socket, and the hardening layer is thick at the bottom of the ball socket, especially when the bottom of the ball socket is provided with an oil hole, the non-uniformity is particularly obvious, and even the sharp corner burning phenomenon appears at the oil hole. UTILITY MODEL CONTENT

[0004] The utility model discloses a utility model purpose is to solve the existing valve tappet ball socket when induction quenching the problem of non-uniform hardening layer, provides a kind of induction quenching device for valve tappet ball socket better quenching quality.

[0005] The utility model provides the technical scheme as follows: a kind of induction quenching device of valve tappet ball socket, comprising:

[0006] Quenching inductor, the quenching inductor is provided with the head portion of approximate "U" shape by induction coil, the head portion is inducted into ball socket, the surface shape of the head portion near the inner surface of ball socket is adapted;

[0007] Magnetic body, sleeve joint is in the induction coil outside of the head portion, the magnetic body is provided with the empty passage of the open direction towards the bottom of ball socket, the axis direction of the empty passage is perpendicular to the plane where the induction coil of the head portion is located, part induction coil of the head portion is exposed from empty passage, the cross section of the empty passage is horn shape.

[0008] The magnetic conductor is provided with an emptying groove at the corresponding position of the bottom surface of the ball socket, so that the induction energy of the ball socket surface during the heating process is not concentrated on the bottom of the ball socket, avoiding the bottom of the ball socket absorbing too much heat, thereby avoiding the bottom of the ball socket from being hardened too thick or causing the sharp corner of the oil hole to burn and melt. The cross section of the emptying groove is trumpet-shaped, so that the induction energy at the bottom of the ball socket gradually decreases, avoiding the sudden change of the induction energy causing the uneven thickness of the hardened layer.

[0009] As a preferred, the magnetic conductor is provided with a clamping groove for covering the induction coil at the head, and the clamping groove is provided with two and located on both sides of the emptying groove. The clamping groove is provided to facilitate the clamping of the magnetic conductor from the side of the two ends of the head.

[0010] As a preferred, the two side walls of the clamping groove are parallel to each other, and since the magnetic conductor generally does not have elasticity, the two side walls of the clamping groove are parallel to each other to facilitate the compression and damage of the induction coil when the magnetic conductor is clamped from the side of the two ends of the head.

[0011] As a preferred, the bottom of the ball socket is provided with an oil hole, and the emptying groove is opposite to the oil hole.

[0012] As a preferred, the bottom surface of the emptying groove is arc-shaped, and the wall surface of the emptying groove is smoothly transitioned with the bottom surface. The arc-shaped bottom surface makes the induction capacity change more uniform at the middle of the bottom of the ball socket.

[0013] As a preferred, the emptying groove is provided with a transition area expanding outward at the opening of the wall surface, and the transition area is smoothly transitioned with the wall surface, so that the induction capacity change at the opening edge of the emptying groove is uniform, avoiding the hardening of the surface of the ball socket near the opening edge to produce protrusions or pits.

[0014] As a preferred, the two ends of the head are respectively provided with an induction coil, and the induction coil is covered with a shielding magnetic conductor, that is, the upper part of the magnetic conductor is provided with a shielding magnetic conductor, avoiding the induction energy flowing out of the upper part of the ball socket to affect other parts of the part that do not need to be induction hardened or cannot be induction hardened, for example, for a deep ball socket part, the upper part of the ball socket often does not need to be induction hardened.

[0015] As a preferred, the two induction coils protrude towards each other, and since the induction coil is provided with a shielding magnetic conductor outside, the induction energy does not need to flow out, so the two induction coils can be close to each other, thereby reducing the volume of the shielding magnetic conductor and the entire device.

[0016] As a preferred, the magnetic conductor includes a first magnetic conductor and a second magnetic conductor which are symmetrical to each other, that is, the magnetic conductor is divided into two symmetrical parts according to the installation needs, facilitating installation and production.

[0017] Compared with the existing technology, the present invention has the following beneficial effects:

[0018] Because the magnet is provided with a space-avoiding groove at the bottom of the socket, the induction energy on the socket surface will not be concentrated at the bottom of the socket during heating, thus preventing the bottom of the socket from absorbing too much heat, thereby preventing the hardened layer at the bottom of the socket from being too thick or causing the sharp corners of the oil hole to burn;

[0019] The cross section of the air-avoidance groove is trumpet-shaped, which gradually reduces the induction energy at the bottom of the ball socket, avoiding the uneven thickness of the hardened layer caused by sudden changes in the induction energy;

[0020] A shielding magnet is installed on the upper part of the magnet to prevent the outflow of induction energy from the upper part of the ball socket from affecting other areas of the part that do not require induction hardening or cannot be induction hardened. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a side view schematic diagram of the first embodiment of the present utility model;

[0022] Figure 2 This is a three-dimensional schematic diagram of the magnetic conductor 2 according to the first embodiment of the present invention;

[0023] Figure 3 This is a side view of the magnetic conductor 2 according to the first embodiment of the present invention;

[0024] Figure 4 This is a schematic top view of the magnetic conductor 2 according to the first embodiment of the present invention;

[0025] Figure 5 for Figure 4 Schematic diagram of the cross section at AA in FIG;

[0026] Figure 6 This is a side view of the first embodiment of the present invention in use;

[0027] Figure 7 for Figure 6 An enlarged schematic diagram of point B;

[0028] Figure 8 It is a three-dimensional schematic diagram of the magnetic conductor 2 according to the second embodiment of the present invention.

[0029] Explanation of the accompanying drawings: quenching inductor 1, head 11, lead-out coil 12, magnet 2, air-avoiding groove 21, bottom 211, wall 212, transition zone 213, snap-on groove 22, wall 221, first magnet 23, second magnet 24, shielding magnet 3, ball socket 4, oil hole 41, quenching area 42, valve tappet 5. DETAILED DESCRIPTION

[0030] The following further describes the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0031] Example 1, as Figures 1-7 As shown, an induction hardening device for a valve tappet ball socket comprises:

[0032] The quenching sensor 1 is provided with a head 11 in an approximately "U" shape wound by an induction coil. The head 11 extends into the ball socket 4 and the surface shape of the side close to the valve tappet ball socket 4 is adapted to the inner surface of the ball socket 4. Lead-out coils 12 are respectively provided at both ends of the head 11.

[0033] The magnetic conductor 2 is sleeved outside the induction coil of the head 11. The magnetic conductor 2 is provided with a clearance groove 21 with an opening toward the bottom of the ball socket 4. The axis direction of the clearance groove 21 is perpendicular to the plane where the induction coil of the head 11 is located. Part of the induction coil of the head 11 is exposed from the clearance groove 21.

[0034] The shielding magnetic conductor 3 covers the outside of the lead-out coil 12. In this embodiment, two shielding magnetic conductors 3 are provided to cover the two sections of the lead-out coil 12 respectively. The two shielding magnetic conductors 3 can also be provided with an integrated structure.

[0035] The valve tappet 5 and the ball socket 4 and the quenching area 42 on the surface of the ball socket 4 are as follows: Figure 6 and Figure 7 As shown, the quenching inductor 1 emits a magnetic field to generate eddy currents for induction heating quenching after alternating current is passed through. Since the magnetic conductor 2 is provided with an air-avoiding groove 21 at the corresponding position of the bottom surface of the ball socket 4, the induced energy on the surface of the ball socket 4 will not be concentrated on the bottom of the ball socket 4 during the heating process, thereby preventing the bottom of the ball socket 4 from absorbing too much heat, thereby preventing the hardened layer at the bottom of the ball socket 4 from being too thick or causing sharp corners to burn at the oil hole.

[0036] The magnetizer 2 is provided with a snap-in slot 22, which is used to cover the induction coil 11 at the head 11. There are two snap-in slots 22, which are respectively located on both sides of the air-avoiding slot 21. The provision of the snap-in slots 22 facilitates the magnetizer 2 to be directly snapped in from the sides at both ends of the head.

[0037] The two side walls 221 of the card-connecting slot 22 are parallel to each other. Since the magnet 2 generally has no elasticity, the two side walls 221 of the card-connecting slot 22 are parallel to each other to facilitate the compression and destruction of the induction coil when the magnet 2 is directly inserted from the sides of both ends of the head.

[0038] An oil hole 41 is provided at the bottom of the ball socket 4 , and the air-avoiding groove 21 is directly opposite to the oil hole 41 .

[0039] The cross section of the air-avoiding groove 21 is trumpet-shaped, so that the induction energy at the bottom of the ball socket gradually decreases, thereby avoiding uneven thickness of the hardened layer caused by sudden changes in the induction energy.

[0040] The bottom surface 211 of the air-avoiding groove 21 is arc-shaped, and the wall surface 212 of the air-avoiding groove 21 smoothly transitions to the bottom surface 211. The arc-shaped bottom surface 211 makes the inductive capacity in the middle of the bottom of the ball socket more uniform.

[0041] The air-avoiding groove 21 is provided with an outwardly expanding transition zone 213 at the opening of the wall 212. The transition zone 213 smoothly transitions with the wall 212, so that the sensing ability at the opening edge of the air-avoiding groove 21 changes evenly, avoiding the hardening of the surface of the nearby ball socket 4 to produce bumps or pits.

[0042] A shielding magnetizer 3 is mounted above the magnetizer 2 to prevent the induction energy flowing out of the upper portion of the socket 4 from affecting other areas of the part that do not require or cannot be induction hardened. For example, for parts with deep sockets, the upper portion of the socket often does not require induction hardening. Furthermore, because the shielding magnetizer 3 is positioned outside the lead coil 12, eliminating the need for induction energy flow, the two lead coil sections 12 are protruded toward each other, placing them closer together. This reduces the size of the shielding magnetizer 3 and the overall device.

[0043] Example 2, as Figure 8 As shown, different from the first embodiment, the magnetizer 2 includes a first magnetizer 23 and a second magnetizer 24 that are symmetrical to each other, that is, the magnetizer 2 is divided into two symmetrical parts according to installation requirements, which is convenient for installation and production.

[0044] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the scope of protection of the present invention.

Claims

1. An induction hardening device for a valve tappet ball socket, characterized in that: include: A quenching inductor (1), wherein the quenching inductor (1) is provided with a head (11) in an approximately "U" shape formed by winding an induction coil, wherein the head (11) extends into the ball socket (4), and the surface shape of the head (11) on the side close to the ball socket (4) is adapted to the inner surface of the ball socket (4); A magnetic conductor (2) is sleeved outside the induction coil of the head (11), and the magnetic conductor (2) is provided with a gap-avoiding groove (21) with an opening toward the bottom of the ball socket (4). The axis direction of the gap-avoiding groove (21) is perpendicular to the plane where the induction coil of the head (11) is located. Part of the induction coil of the head (11) is exposed from the gap-avoiding groove (21), and the cross section of the gap-avoiding groove (21) is trumpet-shaped.

2. The induction hardening device for the valve tappet ball socket according to claim 1, characterized in that: The magnetic conductor (2) is provided with a snap-in slot (22), and the snap-in slot (22) is used to cover the induction coil (11) at the head (11). Two snap-in slots (22) are provided and are respectively located on both sides of the air-avoiding slot (21).

3. The induction hardening device for the valve tappet ball socket according to claim 2, characterized in that: The two side walls (221) of the card connection slot (22) are parallel to each other.

4. The induction hardening device for a valve tappet ball socket according to claim 1, characterized in that: An oil hole (41) is provided at the bottom of the ball socket (4), and the air-avoiding groove (21) is directly opposite to the oil hole (41).

5. The induction hardening device for a valve tappet ball socket according to any one of claims 1 to 4, characterized in that: The bottom surface (211) of the air-avoiding groove (21) is arc-shaped, and the wall surface (212) of the air-avoiding groove (21) transitions smoothly with the bottom surface (211).

6. The induction hardening device for a valve tappet ball socket according to any one of claims 1 to 4, characterized in that: The air-avoiding groove (21) is provided with an outwardly expanding transition zone (213) at the opening of the wall surface (212), and the transition zone (213) smoothly transitions to the wall surface (212).

7. The induction hardening device for a valve tappet ball socket according to any one of claims 1 to 4, characterized in that: Lead-out coils (12) are respectively provided at both ends of the head (11), and the outside of the lead-out coils (12) is covered with a shielding magnetic conductor (3).

8. The induction hardening device for a valve tappet ball socket according to any one of claims 1 to 4, characterized in that: The two sections of lead-out coils (12) protrude toward each other.

9. The induction hardening device for a valve tappet ball socket according to any one of claims 1 to 4, characterized in that: The magnetic conductor (2) comprises a first magnetic conductor (23) and a second magnetic conductor (24) that are symmetrical to each other.

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