Piston quenching device

Abstract

The utility model relates to the field of piston equipment, in particular to a piston quenching device. The piston quenching device comprises a quenching tank, a tray and an air nozzle, the tray is arranged in the quenching tank and is used as a bearing tray when a piston blank is quenched; the air nozzle is arranged in the quenching tank, the air nozzle is connected with an air injection chamber source through an air injection pipeline, and a first switch valve for controlling the pipeline to be opened and closed is arranged in the air injection pipeline; the air nozzle is located on the tray and used for being inserted into an inner cavity of a piston blank placed on the tray. According to the piston quenching device, the air nozzles are arranged in the quenching tank to spray air to the quenched piston blank, compressed air sprayed out of the air nozzles can blow water vapor in an inner cavity of a piston out of pin holes in the two sides, the water vapor is prevented from being absorbed by a salt core in the piston blank, and the problem that the salt core is dissolved and corroded is effectively solved.

Description

Technical Field

[0001] This application relates to the field of piston devices, and particularly to a piston quenching device. Background Art

[0002] Existing pistons are basically manufactured by means such as casting, forging, and welding; in the casting method, the cooling oil channels of the piston are usually formed by means of a water-soluble salt core during the casting of the piston blank, that is, a salt core with the same shape as the inner cooling oil channel is manufactured in advance according to the size of the inner cooling oil channel, and then the salt core is installed and fixed on the piston casting mold to cast the piston blank. Finally, high-pressure water is used to wash out the salt core through the oil inlet and outlet holes in the piston cavity. The cavity left after washing is the piston inner cooling oil channel. In the casting process of the piston, usually after the piston blank is cast, it will immediately be subjected to residual heat quenching using the residual heat of the blank (at this time, the salt core is still inside the piston blank). After the piston blank in the mold is taken out, it is immediately placed on the tray in the quenching pool and sinks with the tray into the cooling water for quenching. The existing quenching devices and their quenching methods mainly have the following defects:

[0003] A large amount of water vapor is generated during the quenching of the blank. The water vapor in the inner cavity of the piston blank will be absorbed by the salt core through the oil inlet and outlet holes. When it reaches a certain amount, the salt core near the oil inlet and outlet holes will be dissolved; the dissolved salt powder will flow down along the oil hole wall. During the flowing process, the water in the salt powder will be evaporated again by the high temperature on the surface of the blank, and the salt powder will adhere to the surface of the blank and is not easily noticed by the operator. After a period of time (generally 3 - 7 days), the surface of the blank adhered to by the salt powder will show salt corrosion, which is irreparable, resulting in the scrapping of the cast piston blank; in addition, since the surface corroded by salt is generally difficult to detect in a short time, some corrosion even appears after packaging and warehousing, seriously wasting production costs. Utility Model Content

[0004] The present utility model provides a piston quenching device to solve the problem of salt corrosion during the quenching of piston blanks in the background art.

[0005] The technical solution provided by this application is as follows:

[0006] This application provides a piston quenching device, including: a quenching tank, a tray, and a jet nozzle;

[0007] The tray is arranged in the quenching tank and is used as a loading tray when quenching the piston blank;

[0008] The jet nozzle is arranged in the quenching tank. The jet nozzle is connected to a jet chamber source through a jet pipeline, and a first switch valve for controlling the conduction and closing of the pipeline is arranged in the jet pipeline; the jet nozzle is located on the tray, and the jet nozzle is used to insert into the inner cavity of the piston blank placed on the tray.

[0009] Further, a first through hole is provided in the tray, and the air jet nozzle is inserted into the first through hole of the tray. The air jet port end of the air jet nozzle is higher than the liquid level of the coolant in the quenching tank; the air inlet end of the air jet nozzle is connected to the air jet chamber source through an air jet pipeline.

[0010] Further, the piston quenching device of the present application further includes a lifting mechanism, and the lifting mechanism is connected to the tray to form a lifting tray; the lifting mechanism is used to drive the tray to move up and down, so as to drive the piston blank on the tray and the tray to be placed at the quenching position in the quenching tank for quenching.

[0011] Further, the lifting mechanism includes: a power unit and a connecting rod frame; one end of the connecting rod frame is connected to the tray located in the quenching tank, and the other end of the connecting rod frame is connected to the power unit; the power unit is used to provide the power required for the up and down movement of the tray;

[0012] The power unit is a ball screw mechanism driven by a motor, and the connecting rod frame is connected to the screw nut of the ball screw mechanism and moves up and down on the ball screw along with the screw nut; alternatively, the power unit is one of an electric push rod, a cylinder or an oil cylinder, and the connecting rod frame is connected to the output end of the electric push rod, the cylinder or the oil cylinder.

[0013] Further, the first switching valve is an electric valve.

[0014] Further, a sensor is also provided on the tray, and the sensor is used to sense the piston blank on the tray.

[0015] Further, a liquid level gauge for marking the liquid level is provided in the quenching tank.

[0016] Further, a liquid inlet and a liquid outlet are respectively provided on the side wall of the quenching tank near the bottom of the quenching tank, and switching valves are provided at both the liquid inlet and the liquid outlet.

[0017] Advantageous effects:

[0018] Compared with the prior art, the piston quenching device of the present application includes a quenching tank, a tray and an air jet nozzle; in the piston quenching tank device of the present application, an air jet nozzle is provided in the quenching tank to jet air on the piston blank to be quenched, and the compressed air jetted by the air jet nozzle can blow the water vapor in the inner cavity of the piston out from both side pin holes, preventing it from being absorbed by the salt core in the piston blank, and effectively reducing the problem of salt core dissolution and corrosion. Description of the drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 This is a schematic structural diagram of a piston quenching device of the present application;

[0021] Figure 2 is Figure 1 a schematic diagram of the height range of the cooling liquid level in the quenching tank located in the pin hole of the piston blank;

[0022] Figure 3 is Figure 1 a schematic layout structure diagram of the air nozzles on the tray and the piston blank in

[0023] Reference numerals: 1, quenching tank; 2, tray; 3, air nozzle; 4, piston blank; 5, salt core; 6, coolant; 7, cooling liquid level; 8, liquid inlet; 9, liquid outlet; 10, lifting mechanism; 11, connecting rod frame. Specific embodiments

[0024] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present application.

[0025] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly disposed on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0026] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0027] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meanings of "multiple" and "several" are two or more, unless otherwise specifically defined.

[0028] It should be noted that the structures, proportions, sizes, etc. shown in the attached drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the implementation conditions of this application. Therefore, they do not have substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the efficacy that this application can produce and the purpose that can be achieved, should still fall within the scope covered by the technical content disclosed in this application.

[0029] See Figures 1 to 3 , this application provides a piston quenching device, including: a quenching tank 1, a tray 2, and a jet nozzle 3;

[0030] The tray is arranged in the quenching tank and serves as a loading tray when quenching the piston blank 4.

[0031] The jet nozzle is arranged in the quenching tank. The jet nozzle is connected to the jet chamber source through a jet pipe. A first switch valve for controlling the on and off of the pipe is arranged in the jet pipe. The jet nozzle is located on the tray and is used to insert into the inner cavity of the piston blank placed on the tray.

[0032] In the piston quenching device of this application, by arranging a jet nozzle in the quenching tank to jet air on the quenched piston blank, the compressed gas ejected by the jet nozzle can blow the water vapor in the inner cavity of the piston out from the two side pin holes, preventing it from being absorbed by the salt core in the piston blank, and effectively reducing the problem of salt core dissolution and corrosion.

[0033] It can be understood that in the casting piston quenching process in the industry, the process standard requires that the height of the coolant liquid level needs to exceed the center plane of the piston pin hole, but not exceed the highest point of the piston pin hole, that is, the coolant liquid level 7 is within the h range of the piston blank, as Figure 2 shown.

[0034] As a preferred implementation manner, a first through hole is provided in the tray. The jet nozzle is inserted into the first through hole of the tray, and the jet port end of the jet nozzle is higher than the liquid level of the coolant 6 in the quenching tank. The air inlet end of the jet nozzle is connected to the jet chamber source through a jet pipe. Referring to Figure 1 and Figure 3 shown, the jet nozzle of this application is inserted into the first through hole of the tray, the structure setting is simplified, and at the same time, the jet port end of the jet nozzle is higher than the liquid level of the coolant in the quenching tank. The compressed gas ejected by the jet nozzle can blow the water vapor in the inner cavity of the piston blank out from the two side pin holes, reducing the absorption of water vapor by the salt core 5.

[0035] As a preferred implementation manner, the piston quenching device of this application further includes a lifting mechanism 10. The lifting mechanism is connected to the tray to form a lifting tray. The lifting mechanism is used to drive the tray to lift, so as to drive the tray and the piston blank on the tray to stop at the quenching position in the quenching tank for quenching.

[0036] As a feasible implementation manner, the lifting mechanism 10 includes: a power unit and a connecting rod frame 11; one end of the connecting rod frame is connected to the tray located in the quenching tank, and the other end of the connecting rod frame is connected to the power unit; the power unit is used to provide the power required for the lifting movement of the tray;

[0037] The power unit is a ball screw mechanism driven by a motor, and the connecting rod frame is connected to the screw nut of the ball screw mechanism and moves up and down on the ball screw along with the screw nut; alternatively, the power unit is one of an electric push rod, a cylinder or an oil cylinder, and the connecting rod frame is connected to the output end of the electric push rod, the cylinder or the oil cylinder. Preferably, the connecting rod frame is an L-shaped structure, the vertical rod end of the L-shaped connecting rod frame is connected to the tray, and the horizontal rod end of the L-shaped connecting rod frame is connected to the power unit.

[0038] It can be understood that the quenching position in the quenching tank is set according to the piston quenching process, where the liquid level of the coolant in the quenching tank needs to exceed the center plane of the piston pin hole but not exceed the highest point of the piston pin hole; that is, according to the height information of the coolant liquid level in the quenching tank and the height information of the piston blank pin hole, the height position information of the quenching position can be obtained, so that when the piston blank on the tray is quenched, the cooling liquid level of the quenching tank is between the center plane of the piston blank pin hole and the highest point of the piston pin hole; there is a blowing gap channel between the cooling liquid level and the pin hole of the piston blank, as shown in Figure 3 shown; the coolant in this embodiment is cooling water.

[0039] Preferably, the first switching valve is an electric valve; a liquid level gauge for marking the liquid level is provided in the quenching tank, and the liquid level gauge can display and know the liquid level position of the coolant in the quenching tank; an inductor is also provided on the tray, and the inductor is used to sense the piston blank on the tray; the inductor is preferably a gravity sensor.

[0040] It can be understood that the piston quenching tank device of the present application further includes a controller system, the controller system is connected to the lifting mechanism, and the controller system controls the lifting driving stroke of the lifting mechanism according to the height position information of the quenching position obtained from the height information of the cooling liquid level in the quenching tank and the height information of the piston blank pin hole, so as to drive the piston blank on the tray to stop at the quenching position for quenching.

[0041] The first switching valve, the liquid level gauge and the inductor are all communicatively connected to the controller system. When the piston blank to be quenched is placed on the tray, the inductor generates an induction signal, and the controller system controls the lifting mechanism to drive to the lifting stroke, so that the piston on the tray descends to the quenching position for quenching; it can be understood that the controller system will control the quenching time of the piston blank according to the quenching process requirements, and after reaching the quenching time required by the process, the controller system can control the lifting mechanism to drive the tray to automatically lift and reset.

[0042] It should be noted that the controller system is an existing PLC or single-chip microcomputer controller system; the connection methods and control methods involved in the controller system are all existing technologies.

[0043] As a preferred embodiment, a liquid inlet 8 and a liquid outlet 9 are respectively provided on the side wall of the quenching tank close to the bottom of the quenching tank, and switch valves are provided at both the liquid inlet and the liquid outlet; the switch valves at the liquid inlet and the liquid outlet are preferably electric valves;

[0044] As is known to those skilled in the art, after quenching for a period of time, impurities will precipitate at the bottom of the quenching tank, then the switch valve of the liquid outlet can be opened to drain the liquid and remove the impurities, and after quenching for a period of time, the coolant in the quenching tank will evaporate and decrease, then the coolant pipeline can be connected through the liquid inlet, and the switch valve of the liquid inlet can be opened to add coolant.

[0045] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A piston quenching device, characterized in that, Including: A quenching tank, a tray and a jet nozzle; The tray is arranged in the quenching tank and serves as a loading tray for quenching the piston blank; The jet nozzle is arranged in the quenching tank. The jet nozzle is connected to the jet chamber source through a jet pipe. A first switch valve for controlling the conduction and closing of the pipeline is arranged in the jet pipe. The jet nozzle is located on the tray and is used to insert into the inner cavity of the piston blank placed on the tray.

2. The piston quenching device according to claim 1, wherein, A first through hole is provided in the tray. The jet nozzle is inserted into the first through hole of the tray. The jet port end of the jet nozzle is higher than the liquid level of the coolant in the quenching tank. The air inlet end of the jet nozzle is connected to the jet chamber source through a jet pipe.

3. The piston quenching device according to claim 1 or 2, characterized in that, It further includes a lifting mechanism. The lifting mechanism is connected to the tray to form a lifting tray. The lifting mechanism is used to drive the tray to move up and down so as to drive the tray and the piston blank on the tray to stop at the quenching position in the quenching tank for quenching.

4. The piston quenching device according to claim 3, characterized in that, The lifting mechanism includes: a power unit and a connecting rod frame; one end of the connecting rod frame is connected to the tray located in the quenching tank, and the other end of the connecting rod frame is connected to the power unit; the power unit is used to provide the power required for the up and down movement of the tray; The power unit is a ball screw mechanism driven by a motor. The connecting rod frame is connected to the screw nut of the ball screw mechanism and moves up and down along the ball screw with the screw nut; or the power unit is one of an electric push rod, a cylinder or an oil cylinder, and the connecting rod frame is connected to the output end of the electric push rod, the cylinder or the oil cylinder.

5. The piston quenching device according to any one of claims 1-2 and 4, characterized in that, The first switch valve is an electric valve.

6. The piston quenching device according to claim 5, characterized in that, An inductor is further arranged on the tray, and the inductor is used to sense the piston blank on the tray.

7. The piston quenching device according to claim 6, characterized in that, A liquid level gauge for marking the liquid level is arranged in the quenching tank.

8. The piston quenching device according to any one of claims 1-2, 4, and 6, characterized in that, A liquid inlet and a liquid outlet are respectively arranged on the side wall of the quenching tank near the bottom of the quenching tank, and switch valves are arranged at both the liquid inlet and the liquid outlet.

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