Inductor suitable for crankshaft fillet quenching
By arranging an oblique spray hole in the liquid injection mechanism of the crankshaft fillet quenching sensor, the quenching liquid is sprayed to the crankshaft fillet in an oblique direction, which solves the problem of poor fillet cooling effect in the existing technology and improves the fatigue of the crankshaft. strength.
Patent Information
- Application Number
- CN202323414378.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-14
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2033-12-14
AI Technical Summary
During the crankshaft rounded corner quenching process, the cooling and water spraying direction of the liquid spray net nozzle of the existing sensor is facing the crankshaft axis, resulting in the unsatisfactory cooling effect of the crankshaft rounded corners, which in turn affects the hardness and metallographic structure of the rounded corners after quenching. Reduce the fatigue strength of the crankshaft.
An inductor suitable for crankshaft fillet quenching is designed. By setting an oblique spray hole in the spray mechanism, the quenching liquid is sprayed on the crankshaft fillet in an inclined direction to improve the cooling effect of the fillet.
By improving the cooling effect of the crankshaft fillet, the problem of poor metallographic structure of the fillet is solved and the fatigue strength of the crankshaft after quenching is improved.
Smart Images
Figure CN222374706U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of mechanical manufacturing, in particular to an inductor suitable for crankshaft fillet quenching. Background Art
[0002] The crankshaft is one of the most important parts in the engine, and the problem of crankshaft fatigue fracture is particularly prominent. The fatigue source is concentrated at the fillet on the inner side of the journal crank. In order to improve the fatigue strength of the crankshaft fillet, a fillet quenching process is required. Currently, the metallographic structure is one of the standards for crankshaft quality assessment. In the production process using fillet quenching, it is often found that when the crankshaft quenching sensor sprays water for cooling, the spray direction is toward the axial surface of the crankshaft, which has an unsatisfactory cooling effect on the crankshaft fillet, resulting in poor fillet hardness and metallographic structure of the crankshaft after quenching, resulting in a decrease in the fatigue strength of the crankshaft. Utility Model Content
[0003] The technical problem to be solved by the utility model is to provide an inductor suitable for crankshaft fillet quenching to obtain a stable and uniform needle-shaped martensite metallographic structure of the crankshaft fillet, thereby improving the fatigue strength of the crankshaft after quenching.
[0004] The utility model solves the above-mentioned technical problems with the following technical solutions: an inductor suitable for crankshaft fillet quenching, comprising: an inductor body, two quenching liquid inlet pipes, two spray mechanisms, a water outlet main pipe, a plurality of heating coils and two upper water outlet pipes; the two spray mechanisms are relatively installed at the bottom end of the inductor body, the two quenching liquid inlet pipes are connected to one end of the water outlet main pipe and one of the spray mechanisms in a one-to-one correspondence, the other end of the water outlet main pipe is connected to another of the spray mechanisms, the two upper water outlet pipes are connected to the water outlet main pipe and the quenching liquid inlet pipe connected to the spray mechanisms in a one-to-one correspondence, and the heating coil is arranged on the inductor body; the spray mechanism is provided with a spray net, a plurality of inclined spray holes and a liquid storage chamber, the spray net is arranged in the liquid storage chamber, and the inclined spray holes are arranged on the side walls of the liquid storage chamber.
[0005] The beneficial effect of the utility model is that by arranging an inclined spray hole in the liquid spray mechanism, it is beneficial to spray the quenching liquid in the inclined spray hole onto the fillet of the crankshaft in an inclined direction, thereby improving the cooling effect of the fillet, solving the problem that the metallographic structure of the fillet is difficult to meet the process requirements due to poor cooling effect of the fillet during quenching of the crankshaft fillet, and thus improving the fatigue strength of the crankshaft after quenching.
[0006] On the basis of the above technical solution, the present invention can also be improved as follows.
[0007] Furthermore, the liquid spray net is arranged obliquely, and the liquid spray net divides the liquid storage chamber into a first liquid storage chamber and a second liquid storage chamber which are isolated from each other. The liquid spray net is provided with a plurality of through holes for the quenching liquid to flow from the first liquid storage chamber to the second liquid storage chamber.
[0008] The beneficial effect of adopting the above further scheme is that it is helpful to increase the pressure of the quenching liquid after entering the second liquid storage chamber by limiting the cross-sectional area of the quenching liquid when passing through the liquid spraying network, so that the quenching liquid can be sprayed onto the fillet of the crankshaft through the inclined spray hole at a higher pressure.
[0009] Furthermore, the other end of the water outlet main pipe and the quenching liquid water inlet pipe connected to the liquid spraying mechanism are both connected to the first liquid storage chamber.
[0010] The beneficial effect of adopting the above further solution is that it is conducive to injecting the quenching liquid into the first liquid storage chamber of the liquid spraying mechanism through the water outlet main pipe or directly.
[0011] Furthermore, the oblique spray hole is arranged on the side wall of the second liquid storage chamber, the diameter of the oblique spray hole is 1.8-2 mm, and the inclination angle is 30-45 degrees.
[0012] The beneficial effect of adopting the above further scheme is that the inclined spray hole is conducive to spraying the quenching liquid onto the fillet of the crankshaft under a certain pressure, optimizing the cooling effect of the fillet, improving the metallographic structure stability and uniformity of the fillet, and thus improving the fatigue strength of the crankshaft after quenching.
[0013] Furthermore, the upper water outlet pipe is installed on the side wall of one end of the water outlet main pipeline and the quenching liquid inlet pipe close to the liquid spraying mechanism.
[0014] The beneficial effect of adopting the above further solution is that it is conducive to diverting the quenching liquid, and cooling and quenching the crankshaft axial surface while cooling and quenching the crankshaft fillet.
[0015] Furthermore, it also includes a crankshaft, wherein one end of the upper water outlet pipe away from the water outlet main pipe and the quenching liquid inlet pipe corresponds to the axial surface of the crankshaft, and the inclined spray hole corresponds to the fillet of the crankshaft.
[0016] The beneficial effect of adopting the above further solution is that it is conducive to quenching and cooling the axial surface and fillet of the crankshaft one by one through the upper end water outlet pipe and the inclined spray hole. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 A schematic diagram of the overall structure provided for an embodiment of the utility model;
[0018] Figure 2 for Figure 1 An enlarged schematic diagram of region A in the structure shown;
[0019] Figure 3 A side view of the inductor and crankshaft provided in the embodiment of the utility model when in operation;
[0020] Figure 4 This is a schematic diagram of the assembly of the inductor and crankshaft provided in an embodiment of the utility model when they are working.
[0021] in, Figure 3 The arrow in the figure indicates the spraying direction of the quenching liquid.
[0022] In the accompanying drawings, the components represented by the reference numerals are listed as follows:
[0023] 1. Sensor body; 2. Quenching liquid inlet pipe; 3. Liquid spraying mechanism; 4. Water outlet main pipe; 5. Heating coil; 6. Upper water outlet pipe; 7. Crankshaft; 31. Liquid spraying net; 32. Oblique spray hole; 33. Liquid storage chamber; 331. First liquid storage chamber; 332. Second liquid storage chamber. DETAILED DESCRIPTION
[0024] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.
[0025] like Figures 1 to 4 As shown, an inductor suitable for crankshaft fillet quenching comprises: an inductor body 1, two quenching liquid inlet pipes 2, two spray mechanisms 3, a water outlet main pipe 4, a plurality of heating coils 5 and two upper water outlet pipes 6; the two spray mechanisms 3 are relatively installed at the bottom end of the inductor body 1, the two quenching liquid inlet pipes 2 are connected to one end of the water outlet main pipe 4 and one of the spray mechanisms 3 in a one-to-one correspondence, the other end of the water outlet main pipe 4 is connected to another of the spray mechanisms 3, the two upper water outlet pipes 6 are connected to the water outlet main pipe 4 and the quenching liquid inlet pipe 2 connected to the spray mechanisms 3 in a one-to-one correspondence, and the heating coil 5 is arranged on the inductor body 1; the spray mechanism 3 is provided with a spray net 31, a plurality of inclined spray holes 32 and a liquid storage chamber 33, the spray net 31 is arranged in the liquid storage chamber 33, and the inclined spray holes 32 are arranged on the side wall of the liquid storage chamber 33.
[0026] It should be noted that: in the preferred embodiment of the present invention, the quenching frequency is selected to be 8-12KHZ, the quenching power-voltage ratio is 80%-90%, and the quenching time is selected to be 15-25 seconds to ensure that the effective hardened layer depth at the crankshaft fillet is 2-5mm, and the number of the inclined spray holes 32 is 15-20.
[0027] The beneficial effect of the utility model is that by arranging an inclined spray hole in the liquid spray mechanism, it is beneficial to spray the quenching liquid in the inclined spray hole onto the fillet of the crankshaft in an inclined direction, thereby improving the cooling effect of the fillet, solving the problem that the metallographic structure of the fillet is difficult to meet the process requirements due to poor cooling effect of the fillet during quenching of the crankshaft fillet, and thus improving the fatigue strength of the crankshaft after quenching.
[0028] Preferably, Figure 2 As shown, the liquid spray net 31 is arranged obliquely, and the liquid spray net 31 divides the liquid storage chamber 33 into a first liquid storage chamber 331 and a second liquid storage chamber 332 which are isolated from each other. The liquid spray net 31 is provided with a plurality of through holes for quenching liquid to flow from the first liquid storage chamber 331 to the second liquid storage chamber 332.
[0029] The beneficial effect of adopting the above preferred scheme is that it is helpful to increase the pressure of the quenching liquid after entering the second liquid storage chamber by limiting the cross-sectional area of the quenching liquid when passing through the liquid spraying network, so that the quenching liquid can be sprayed onto the fillet of the crankshaft through the inclined spray hole at a higher pressure.
[0030] Preferably, Figure 1 and Figure 2 As shown, the other end of the water outlet main pipe 4 and the quenching liquid water inlet pipe 2 connected to the liquid spraying mechanism 3 are both connected to the first liquid storage chamber 331 .
[0031] The beneficial effect of adopting the above preferred solution is that it is conducive to injecting the quenching liquid into the first liquid storage chamber of the liquid spraying mechanism through the water outlet main pipeline or directly.
[0032] Preferably, Figure 3 As shown, the oblique spray hole 32 is arranged on the side wall of the second liquid storage chamber 332, the diameter of the oblique spray hole 32 is 1.8-2 mm, and the inclination angle is 30-45 degrees.
[0033] The beneficial effect of adopting the above-mentioned preferred scheme is that the inclined spray hole is conducive to spraying the quenching liquid onto the fillet of the crankshaft under a certain pressure, optimizing the cooling effect of the fillet, improving the metallographic structure stability and uniformity of the fillet, and thus improving the fatigue strength of the crankshaft after quenching.
[0034] Preferably, Figure 1 and Figure 2 As shown, the upper end water outlet pipe 6 is installed on the side wall of the water outlet main pipeline 4 and the quenching liquid inlet pipe 2 at one end close to the liquid spraying mechanism 3.
[0035] The beneficial effect of adopting the above preferred solution is that it is conducive to diverting the quenching liquid, and cooling and quenching the crankshaft fillet while cooling and quenching the crankshaft axial surface.
[0036] Preferably, Figures 2 to 4As shown, it also includes a crankshaft 7, the end of the upper water outlet pipe 6 away from the water outlet main pipe 4 and the quenching liquid water inlet pipe 2 corresponds to the axial surface of the crankshaft 7, and the inclined spray hole 32 corresponds to the fillet of the crankshaft 7.
[0037] The beneficial effect of adopting the above preferred solution is that it is conducive to quenching and cooling the axial surface and fillet of the crankshaft one by one through the upper end water outlet pipe and the inclined spray hole.
[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0040] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0041] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0042] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.
[0043] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.
Claims
1. An inductor suitable for crankshaft fillet quenching, characterized in that: include: An inductor body (1), two quenching liquid inlet pipes (2), two liquid spraying mechanisms (3), a water outlet main pipe (4), a plurality of heating coils (5) and two upper end water outlet pipes (6); The two liquid spraying mechanisms (3) are relatively mounted at the bottom end of the sensor body (1); the two quenching liquid inlet pipes (2) are connected to one end of the outlet main pipe (4) and one of the liquid spraying mechanisms (3) in a one-to-one correspondence; the other end of the outlet main pipe (4) is connected to another of the liquid spraying mechanisms (3); the two upper end outlet pipes (6) are connected to the outlet main pipe (4) and the quenching liquid inlet pipe (2) connected to the liquid spraying mechanisms (3) in a one-to-one correspondence; and the heating coil (5) is arranged on the sensor body (1); The liquid spraying mechanism (3) is provided with a liquid spraying net (31), a plurality of oblique spraying holes (32) and a liquid storage chamber (33); the liquid spraying net (31) is arranged in the liquid storage chamber (33), and the oblique spraying holes (32) are arranged on the side wall of the liquid storage chamber (33).
2. The inductor suitable for crankshaft fillet quenching according to claim 1, characterized in that: The liquid spray net (31) is arranged obliquely, and the liquid spray net (31) divides the liquid storage chamber (33) into a first liquid storage chamber (331) and a second liquid storage chamber (332) which are isolated from each other. The liquid spray net (31) is provided with a plurality of through holes for allowing quenching liquid to flow from the first liquid storage chamber (331) to the second liquid storage chamber (332).
3. The inductor suitable for crankshaft fillet quenching according to claim 2, characterized in that: The other end of the water outlet main pipe (4) and the quenching liquid water inlet pipe (2) connected to the liquid spraying mechanism (3) are both connected to the first liquid storage chamber (331).
4. The inductor suitable for crankshaft fillet quenching according to claim 2, characterized in that: The inclined spray hole (32) is arranged on the side wall of the second liquid storage chamber (332), the diameter of the inclined spray hole (32) is 1.8-2 mm, and the inclination angle is 30-45 degrees.
5. The inductor suitable for crankshaft fillet quenching according to claim 1, characterized in that: The upper end water outlet pipe (6) is installed on the side wall of one end of the water outlet main pipe (4) and the quenching liquid water inlet pipe (2) close to the liquid spraying mechanism (3).
6. The inductor suitable for crankshaft fillet quenching according to claim 1, characterized in that: It also includes a crankshaft (7), wherein one end of the upper water outlet pipe (6) away from the water outlet main pipe (4) and the quenching liquid water inlet pipe (2) corresponds to the axial surface of the crankshaft (7), and the inclined spray hole (32) corresponds to the fillet of the crankshaft (7).