CN202214396U - Camshaft combined induction hardening device - Google Patents

Abstract

The utility model discloses a camshaft combination formula induction hardening device, including induction coil, cooling tube, still including establishing the shielding circle of terminal surface about induction coil, be equipped with the insulation board between shielding circle and the induction coil, induction coil connects the one end at two busbars, is equipped with the insulation board between two busbars, and the outside of two busbars respectively is equipped with the cooling tube, the other end of busbar are connected with the locating plate, the induction coil outside is equipped with the inlet opening, and inside correspondence is equipped with the hole for water spraying, and induction coil inside is equipped with the recess corresponding with the camshaft axle head. The utility model discloses can carry out the simultaneous heating quenching to the cam of three similar position simultaneously, correspond with the camshaft axle head in addition and be equipped with the recess and can avoid non-quenching region to be heated and quenched. Not only the processing cycle is shortened and the production efficiency is improved, but also the induction soft belt is prevented and the product quality is stabilized.

Description

Camshaft combined induction hardening device

technical field

The utility model relates to a cam shaft induction hardening device, in particular to a combined induction device for simultaneously quenching three similar cams.

Background technique

In order to obtain sufficient hardness on the surface of the cam to ensure its wear resistance, the heat treatment of the camshaft is usually based on intermediate frequency induction hardening. The traditional camshaft induction hardening device determines the size of the inductor according to the size of the cam to be quenched. During quenching, the cams of the same size are induction heated and quenched one by one at the same time.

However, some camshafts contain cams of different widths. For example, two narrow cams are next to the wide cam in the middle. It is necessary to make two induction devices with different specifications and sizes according to the size of the narrow cam and the wide cam. The wide cams are quenched one by one, and then the narrow cams are quenched one by one, which will easily cause problems such as long processing cycle and low production efficiency. In addition, due to the close distance between the cams, it is easy to cause the temperature at the edge of the adjacent quenched wide cam to rise when the narrow cam is heated to form an induction soft band.

Utility model content

Aiming at the above-mentioned prior art, the technical problem to be solved by the utility model is to provide a combined induction hardening device which avoids the formation of induction soft bands and can simultaneously heat and quench three cams at similar positions. the

In order to solve the above technical problems, the utility model adopts the following technical scheme: a camshaft combined induction hardening device, including an induction coil and a cooling pipe, the induction coil is fixed on one end of two busbars with an insulating plate in the middle, The other end of the bus bar is connected to the positioning plate, the two ends of the induction coil are provided with shielding rings, an insulating plate is provided between the shielding ring and the induction coil, the outer sides of the two bus bars are respectively provided with the cooling pipes, and the induction coil is provided outside There is a water inlet hole, and the inside is provided with a water spray hole corresponding to the water inlet hole, and a groove corresponding to the bottom of the camshaft shaft.

Further, the height of the induction coil is greater than the total position width of the three cams to be quenched.

Further, the cooling pipe is U-shaped.

Further, the insulating board is made of mica board.

Compared with the prior art, the utility model has the following beneficial effects: the cams at three similar positions can be heated and quenched at the same time, and the induction coil is provided with a groove corresponding to the bottom of the camshaft, which can prevent the non-quenched area from being heated Quenching. Not only the processing cycle is shortened, the production efficiency is improved, but also the induction soft belt is prevented, and the product quality is stabilized.

Description of drawings

Fig. 1 is the top view of the utility model embodiment;

Fig. 2 is the left view of Fig. 1;

Fig. 3 is a cross-sectional view of the induction coil of the embodiment of the present invention.

In the figure: 1. Induction coil, 2. Bus bar, 3. Insulation plate, 4. Water inlet hole, 5. Cooling pipe, 6. Positioning plate, 7. Shielding ring, 8. Insulation bolt.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

Referring to Fig. 1 and Fig. 2, a camshaft combined induction hardening device includes an induction coil 1, a cooling pipe 5, and a shielding ring 7 connected to both ends of the induction coil 1 by insulating bolts 8, and the shielding ring 7 and the induction coil 1 is provided with an insulating plate 3, the induction coil 1 is welded and fixed on one end of two bus bars 2, the two bus bars 2 make the current form a loop, and an insulating plate made of mica board is arranged between the two bus bars 2 3. The outer sides of the two busbars 2 are respectively welded to fix the cooling pipes 5. As a preference, the cooling pipes 5 are U-shaped, which is convenient for connecting backflow cooling water, so as to ensure that the busbars 2 will not be affected by high temperature and the temperature is too high. The other end of the bus bar 2 is welded and fixed on the positioning plate 6, and the positioning plate 6 is used for axial and radial positioning of the device; the induction coil 1 is provided with a water inlet hole 4 on the outside, and a water spray hole is correspondingly provided on the inside. Connect the cooling medium water pipe to the water inlet hole 4 of the induction coil 1, a water cavity is formed in the induction coil 1, and the water spray holes are evenly distributed on the inner diameter of the inductor, so that during quenching, the medium water enters through the water inlet hole 4 The water cavity of the induction coil 1 is sprayed out from the water spray hole to complete the quenching of the cam. The induction coil 1 is provided with a groove corresponding to the bottom of the camshaft.

As shown in Figure 3, the outer diameter of the induction coil 1 is C, and the inner diameter A of the induction coil 1 is determined according to the diameter of the camshaft to ensure that the camshaft can pass through the induction coil 1 smoothly, and according to the total position of the three cams to be quenched The width determines the overall height B of the induction coil 1 . Since the cam is a part that needs to be hardened, and the shaft bottom between the cams is a non-hardened area, the position of the inner diameter of the induction coil 1 corresponding to the shaft bottom is made into a groove, which can prevent the non-quenched area from being heated and quenched.

After setting the process parameters, when the camshaft moves to the specified position, the induction coil 1 heats the cam through electromagnetic induction. When it is heated to a predetermined temperature, the medium water enters the water cavity of the induction coil 1 through the water inlet hole 4. The water spray hole sprays out to cool the cam, so that three similar cams can be heated and quenched at the same time. After completion, the camshaft continues to move to the next quenching position to continue quenching.

Claims (4)

1. A camshaft combined induction hardening device, comprising an induction coil and a cooling pipe, is characterized in that: the induction coil is fixed on one end of two busbars with insulating plates in the middle, and the other end of the busbar is connected to a positioning plate , the two ends of the induction coil are provided with shielding rings, an insulating plate is provided between the shielding ring and the induction coil, the outer sides of the two bus bars are respectively provided with the cooling pipes, the induction coil is provided with a water inlet hole outside, and the inside is provided with The spray hole corresponding to the water inlet hole, and the groove corresponding to the bottom of the camshaft shaft. 2. The camshaft combined induction hardening device according to claim 1, characterized in that: the height of the induction coil is greater than the width of the total positions of the three cams to be hardened. 3. The camshaft combined induction hardening device according to claim 1, characterized in that: the cooling pipe is U-shaped. 4. The camshaft combined induction hardening device according to claim 1, characterized in that: the insulating plate is made of mica plate.

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