Surface infiltration device for wear-resistant insert ring for aluminum piston

Abstract

The utility model discloses a device for surface infiltration of a wear-resistant insert ring for an aluminum piston, which comprises an induction coil for heating molten aluminum, an overflow pipe for balancing the pressure in a first infiltration crucible, and protective gas for pressing the molten aluminum into a second infiltration crucible, the infrared distance detection sensor and the flow controller are used for feeding back and controlling the input speed and flow of shielding gas, and the adjustable bolt support is used for guaranteeing the stability of the device. The aluminum alloy piston solves the problems that in the casting process of a traditional aluminum alloy piston, due to the facts that the surface layer of the insert ring is prone to being oxidized, aluminizing is not thorough and the like, an iron-aluminum bonding layer is very fragile, stress exists, extension is not achieved and the like, the insert ring is loosened or cracked in the using process of the piston, and the service life of the piston is prolonged. The efficiency of the engine is influenced, and even more serious consequences are caused.

Description

TECHNICAL FIELD

[0001] The utility model belongs to sand casting technical field, concretely relates to a device for surface infiltration of wear-resistant insert ring for aluminum piston. BACKGROUND

[0002] The aluminum alloy piston insert ring is mainly used to improve the wear resistance, high temperature resistance and service life of the piston. The piston head inserts the wear-resistant insert ring, which can effectively improve the wear resistance of the first ring groove, reduce wear and tear, thereby prolonging the service life of the piston, and the ring groove life can be improved by 3 to 10 times. In addition, the material of the wear-resistant insert ring is usually high-nickel austenitic cast iron, which has similar expansion coefficients with the aluminum piston, which helps to maintain stable combination in high temperature environment and reduce the phenomenon of insert ring separation caused by mismatch of thermal expansion. The wear-resistant insert ring also has excellent thermal conductivity and corrosion resistance, which helps to transfer and dissipate heat, keeps the temperature of the piston head within a reasonable range, adapts to different working environments, and ensures stability under various conditions. Therefore, the piston with the insert ring has obvious advantages in performance and can meet the needs of high-load engines.

[0003] At present, the material of the wear-resistant insert ring for aluminum alloy piston is usually high-nickel austenitic cast iron, and the performance difference between the insert ring material and the aluminum alloy base material is large. At the same time, the aluminum alloy piston is easily affected by factors such as oxidation of the insert ring surface layer and incomplete aluminum infiltration during casting, resulting in very fragile iron-aluminum bonding layer, stress, and lack of ductility and other defects, which leads to insert ring loosening or cracking during piston use, affecting engine efficiency and even causing more serious consequences.

[0004] Therefore, the utility model provides a device for surface infiltration of wear-resistant insert ring for aluminum piston, which can perform aluminum infiltration on the wear-resistant insert ring for aluminum piston in advance, improve the insert casting quality, and the device has small size and can be easily replaced in the work station, so that flexible operation and convenient operation can be realized. UTILITY MODEL CONTENTS

[0005] The utility model solves the technical problem that the traditional aluminum alloy piston is easily affected by factors such as oxidation of the insert ring surface layer and incomplete aluminum infiltration during casting, resulting in very fragile iron-aluminum bonding layer, stress, and lack of ductility and other defects, which leads to insert ring loosening or cracking during piston use, affecting engine efficiency and even causing more serious consequences.

[0006] In order to solve the above technical problems, the utility model provides an aluminium piston wear -resisting insert ring surface infiltration's device, including first infiltration crucible, protection gas bottle and second infiltration crucible, the first infiltration crucabble is surrounded with induction coil inside, the first infiltration crucible stores up aluminium liquid inside, the protection gas bottle sets up at the side of first infiltration crucible, the protection gas bottle is filled with protection gas inside, be provided with vent tube between the protection gas bottle and first infiltration crucible, vent tube communicates first infiltration crucible and protection gas bottle, be provided with gas valve on vent tube, the first infiltration crucibble is provided with cover plate above, be provided with second infiltration crucible above cover plate, second infiltration crucible bottom is provided with liquid pipe, the lower pipe mouth of liquid pipe stretches into aluminium liquid, be provided with insert ring support inside second infiltration crucible, the design that the first infiltration crucibble is surrounded with induction coil inside, through induction coil heats the aluminium liquid in first infiltration crucible, makes aluminium liquid reach set temperature, the protection gas bottle is filled with protection gas inside, be provided with vent tube between the protection gas bottle and first infiltration crucible, the design that vent tube communicates first infiltration crucible and protection gas bottle is used for through the input of protection gas, the aluminium liquid of heating completion is pressed to second infiltration crucible, be provided with gas valve on vent tube's design is used for controlling the on-off of protection gas input, second infiltration crucible bottom is provided with liquid pipe, the design that the lower pipe mouth of liquid pipe stretches into aluminium liquid is used for delivering the aluminium liquid in first infiltration crucible to second infiltration crucible, be provided with insert ring support inside second infiltration crucible's design is used for placing aluminium piston, provides the work space of infiltration operation.

[0007] Further, the first infiltration crucible side is provided with a gas overflow pipe, the gas overflow pipe penetrates the first infiltration crucible, the inner side of the connection between the gas overflow pipe and the first infiltration crucible is provided with a first sealing ring, the outer side of the connection between the gas overflow pipe and the first infiltration crucible is provided with a second sealing ring, and the gas overflow pipe is provided with a gas overflow valve.

[0008] Further, it further comprises a crucible flange and a sealing layer, which are arranged between the first infiltration crucible and the cover plate.

[0009] Further, the sink bolt is further included for fixing the flange of the crucible and the cover plate, preventing the separation of the first infiltration crucible and the cover plate due to the internal pressure of the first infiltration crucible, so that the molten aluminum cannot rise to the second infiltration crucible for infiltration work.

[0010] Further, the fixed support is arranged above the second infiltration crucible, the hanging hook is arranged below the fixed support, the hanging ring is hung on the hanging hook, the hanging ring is arranged above the inlay ring support, the inlay ring fixing ring is arranged outside the inlay ring support, and the infrared distance measuring sensor is further arranged below the fixed support, the fixed support is arranged above the second infiltration crucible, the hanging hook is arranged below the fixed support, the hanging ring is hung on the hanging hook, the hanging ring is arranged above the inlay ring support, the inlay ring fixing ring is arranged outside the inlay ring support, and the infrared distance measuring sensor is further arranged below the fixed support, which is arranged above the inlay ring support, and is used for fixing the position of the inlay ring outer support, preventing uneven infiltration and reducing the quality of inlay casting.

[0011] Further, the second infiltration crucible comprises an outer wall and an inner wall, and a heat insulation layer is arranged between the outer wall and the inner wall, which is arranged between the outer wall and the inner wall, and is used for preventing safety problems caused by the high temperature on the outside of the second infiltration crucible.

[0012] Further, the third sealing ring is arranged inside the connection between the snorkel and the first infiltration crucible, and the fourth sealing ring is arranged outside the connection between the snorkel and the first infiltration crucible, which is arranged inside the connection between the snorkel and the first infiltration crucible, and is arranged outside the connection between the snorkel and the first infiltration crucible, and plays a sealing role between the first infiltration crucible and the snorkel.

[0013] Further, the flow controller is further arranged on the snorkel, which is arranged on the snorkel, and is used for accurately monitoring the protective gas by controlling the flow controller, and feeding back the related data to the control system in real time, and then controlling the flow rate and flow of the protective gas.

[0014] Further, the precise thermocouple is further arranged in the cover plate, and the lower end of the precise thermocouple extends into the molten aluminum, which is arranged in the cover plate, and the lower end of the precise thermocouple extends into the molten aluminum, and is used for monitoring the temperature of the molten aluminum and judging whether the infiltration work can be started.

[0015] Further, the first infiltration crucible bottom is provided with an adjustable bolt support, the design of the first infiltration crucible bottom provided with the adjustable bolt support is used for stably erecting the device, and the safety hidden danger caused by unstable erection of the device is prevented.

[0016] Further, the device is heated by the induction coil, the safety hidden danger caused by excessive pressure in the device is prevented through the design of the overflow pipe, the aluminum liquid heated in the device is transported to the infiltration working area through the design of the protection gas cylinder, the input speed and flow of the protection gas are fed back and controlled through the design of the infrared distance detection sensor and the flow controller, the normal operation of the infiltration work is ensured, the stability of the infiltration work is ensured through the design of the suspension hook and the suspension ring, so that the high infiltration quality is ensured, and the stability of the device is ensured through the design of the adjustable bolt support, so that the safety of the workers is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 is a front view of the utility model;

[0018] Fig. 2 is a top view of the utility model.

[0019] Among them: 1, induction coil;2, crucible wall;3, first sealing ring;4, second sealing ring;5, overflow valve;6, overflow pipe;7, crucible flange;8, counterbore fixing bolt;9, sealing layer;10, cover plate;11, inlay ring fixing ring;12, inlay ring support;13, suspension hook;14, fixed support;15, suspension ring;16, outer wall;17, heat insulation layer;18, inner wall;19, third sealing ring;20, fourth sealing ring;21, air pipe;22, flow controller;23, gas valve;24, protection gas;25, liquid pipe;26, precision thermocouple;27, aluminum liquid;28, adjustable bolt support;29, first infiltration crucible;30, second infiltration crucibble;31, infrared distance measurement sensor. DETAILED DESCRIPTION

[0020] The embodiment of the utility model will be described in detail below with the drawings and examples, so that the realization process of how to apply technical means to solve technical problems and achieve technical effects of the utility model can be fully understood and implemented.

[0021] Example one

[0022] As Figs. 1-2The device is characterized in that the device for surface infiltration of wear-resistant insert ring of aluminum piston comprises a first infiltration crucible 29, a protective gas bottle and a second infiltration crucible 30, the first infiltration crucible 29 is surrounded by an induction coil 1 inside, the first infiltration crucible 29 stores aluminum liquid 27, the protective gas bottle is arranged on the side of the first infiltration crucible 29, the protective gas bottle is filled with protective gas 24, a gas pipe 21 is arranged between the protective gas bottle and the first infiltration crucible 29, the gas pipe 21 is communicated with the first infiltration crucible 29 and the protective gas bottle, a gas valve 23 is arranged on the gas pipe 21, a cover plate 10 is arranged above the first infiltration crucible 29, the second infiltration crucible 30 is arranged above the cover plate 10, a liquid pipe 25 is arranged at the bottom of the second infiltration crucible 30, the lower pipe opening of the liquid pipe 25 is inserted into the aluminum liquid 27, an insert ring support 12 is arranged inside the second infiltration crucible 30, the aluminum liquid 27 in the first infiltration crucible 29 is heated by the induction coil 1, the aluminum liquid 27 in the first infiltration crucible 29 is pressed into the second infiltration crucible 30 through the liquid pipe 25 by the delivery of the protective gas 24 in the protective gas bottle, and the aluminum alloy piston is placed in the insert ring support 12 in the second infiltration crucible 30 to perform infiltration operation.

[0023] Example two

[0024] As Figs. 1-2As shown in one kind of aluminum piston wear-resistant insert ring surface infiltration device, based on example one: The first infiltration crucible 29 side is provided with overflow pipe 6, the overflow pipe 6 penetrates the first infiltration crucible 29, the overflow pipe 6 is provided with the first sealing ring 3 in the inside of the connection of the first infiltration crucible 29, the overflow pipe 6 is provided with the second sealing ring 4 in the outside of the connection of the first infiltration crucible 29, the overflow pipe 6 is provided with overflow valve 5, still including crucible flange 7 and sealing layer 9, the crucible flange 7 and sealing layer 9 are arranged between the first infiltration crucible 29 and cover plate 10, still including counterbore fixing bolt 8, the crucible flange 7 is fixed with cover plate 10 through counterbore fixing bolt 8, the second infiltration crucible 30 is provided with fixed support 14, the fixed support 14 is provided with suspension hook 13 below, the suspension hook 13 is hung with suspension ring 15, the suspension ring 15 is arranged above insert ring support 12, the insert ring support 12 is provided with insert ring fixing ring 11 outside, the fixed support 14 is still provided with infrared distance measuring sensor 31 below, the second infiltration crucible 30 includes outer wall 16 and inner wall 18, the outer wall 16 and inner wall 18 are provided with heat insulation layer 17, the third sealing ring 19 is arranged in the inside of the connection of the first infiltration crucible 29 and air pipe 21, the fourth sealing ring 20 is arranged in the outside of the connection of the first infiltration crucible 29 and air pipe 21, the air pipe 21 is still provided with flow controller 22, the cover plate 10 is still provided with precision thermocouple 26, the lower end of the precision thermocouple 26 is inserted into aluminum liquid 27, the first infiltration crucible 29 bottom is provided with adjustable bolt support 28, the gas pressure balance in the first infiltration crucible 29 is ensured through overflow pipe 6, the security risk caused by excessive pressure in the first infiltration crucible 29 is prevented, the sealing between the first infiltration crucible 29 and overflow pipe 6 is ensured through the design of first sealing ring 3 and second sealing ring 4, the stability of infiltration operation is ensured through the design of suspension hook 13 and suspension ring 15, so as to improve the infiltration quality, the strength of insert ring support 12 is ensured through the design of insert ring fixing ring 11, the temperature of outer wall 16 is prevented from being too high and being prone to danger through the design of heat insulation layer 17, the sealing between the first infiltration crucible 29 and air pipe 21 is ensured through the design of third sealing ring 19 and fourth sealing ring 20, the flow rate and flow of input protection gas 24 are controlled through the design of flow controller 22 and infrared distance detection sensor 31, whether the temperature of aluminum liquid 27 reaches the requirement of infiltration is judged through the design of precision thermocouple 26, the stable erection of the device is ensured through the design of adjustable bolt support 28.

[0025] Example three

[0026] As Figs. 1-2 shown in one kind of aluminum piston wear-resistant insert ring surface infiltration device, its use method is:

[0027] S1, the aluminum piston is placed in the operating station with the wear-resistant insert ring surface infiltration device, and the adjustable bolt support 28 is adjusted to be horizontal by cooperating with the level;

[0028] S2, the amount of aluminum alloy related formula required to be melted is calculated according to the cavity volume of the first infiltration crucible 29, and special attention is paid to the fact that the amount of aluminum alloy is accurate to the position of 1 / 2-2 / 3 of the cavity volume after being melted, and the type of aluminum alloy is consistent with the formula of the cast aluminum alloy;

[0029] S3, the counterbore fixing bolt 8 is opened, the crucible wall 2, the sealing layer 9 and the cover plate 10 are separated, the aluminum alloy related raw materials calculated in S2 are placed in the first infiltration crucible 29, the positions are aligned in the order of the crucible wall 2, the sealing layer 9 and the cover plate 10, the counterbore fixing bolt 8 is tightened, and the overflow valve 5 and the valve 23 are kept in the closed state, so as to form a closed cavity;

[0030] S4, the induction coil 1 is powered on, and the aluminum alloy raw materials in the crucible are melted at 670±10 DEG C, and special attention is paid to the fact that the current and other related process parameters of the induction coil 1 in the utility model and the opening and closing control of the valve are controlled by the external control system, and the overflow valve 5 is opened and the valve 23 is closed in this process;

[0031] S5, the temperature of the aluminum liquid 27 is measured to the preset temperature by using the precision thermocouple 26, and the overflow valve 5 is closed;

[0032] S6, the suspension ring 15 is hung on the suspension hook 13, and the loaded insert ring support is hung in the second infiltration crucible 30;

[0033] S7, the valve 23 is opened, the protective gas 24 is filled into the first infiltration crucible 29 at a certain flow rate, and special attention is paid to the fact that the flow rate controller 22 accurately monitors the protective gas 24 and feeds back the related data to the control system in real time, and then the flow rate and flow rate are closely controlled;

[0034] S8, the liquid level is detected by using the infrared distance measuring sensor 31, and the protective gas 24 is input into the second infiltration crucible 30 at a certain flow rate and flow rate after being processed by the control system;

[0035] S9, the aluminum liquid 27 is smoothly pressed into the second infiltration crucible 30 through the liquid pipe 25, and when the liquid level of the aluminum liquid 27 is higher than the uppermost insert ring of the insert ring support 12 by 6-10 mm, the pressure is maintained for a certain time, and special attention is paid to the fact that the related data of the liquid level rising are fed back to the control system in real time, and the insert ring infiltration protective gas 24 is smoothly released;

[0036] S10, after the surface treatment of the insert ring is completed, the control system controls the protective gas 24 to release the inflation pressure according to a certain time, and the aluminum liquid 27 returns to the second infiltration crucible 30 again;

[0037] S11, all the inserts loaded on the insert holder 12 are removed and stored in a dry oven, and the surface infiltration of the wear-resistant insert for the aluminum piston is completed;

[0038] S12, the wear-resistant insert for the aluminum piston after the infiltration is placed in the position of the piston casting mold tooling, and the pouring operation is performed.

Claims

1. A device for surface infiltration of wear-resistant inserts for aluminum pistons, characterized in that: The system includes a first melting crucible (29), a protective gas cylinder, and a second melting crucible (30). An induction coil (1) surrounds the inside of the first melting crucible (29), and molten aluminum (27) is stored within it. The protective gas cylinder is positioned on the side of the first melting crucible (29) and is filled with protective gas (24). A vent pipe (21) is provided between the protective gas cylinder and the first melting crucible (29). The first melting crucible (29) and the protective gas cylinder are connected. A gas valve (23) is provided on the gas pipe (21). A cover plate (10) is provided above the first melting crucible (29). A second melting crucible (30) is provided above the cover plate (10). A liquid pipe (25) is provided at the bottom of the second melting crucible (30). The lower end of the liquid pipe (25) extends into the aluminum liquid (27). A ring support (12) is provided inside the second melting crucible (30).

2. The device for surface infiltration of wear-resistant inserts for aluminum pistons according to claim 1, characterized in that: An overflow pipe (6) is provided on the side of the first melting crucible (29). The overflow pipe (6) passes through the first melting crucible (29). A first sealing ring (3) is provided on the inner side of the connection between the overflow pipe (6) and the first melting crucible (29). A second sealing ring (4) is provided on the outer side of the connection between the overflow pipe (6) and the first melting crucible (29). An overflow valve (5) is provided on the overflow pipe (6).

3. The device for surface infiltration of wear-resistant inserts for aluminum pistons according to claim 1, characterized in that: It also includes a crucible flange (7) and a sealing layer (9), which are disposed between the first melting crucible (29) and the cover plate (10).

4. The device for surface infiltration of wear-resistant inserts for aluminum pistons according to claim 3, characterized in that: It also includes countersunk bolts (8), and the crucible flange (7) and the cover plate (10) are fixed by countersunk bolts (8).

5. The device for surface infiltration of wear-resistant inserts for aluminum pistons according to claim 1, characterized in that: A fixed support (14) is provided above the second melting crucible (30), and a hanging hook (13) is provided below the fixed support (14). A hanging ring (15) is attached to the hanging hook (13). The hanging ring (15) is located above the ring bracket (12). A ring fixing ring (11) is provided on the outside of the ring bracket (12). An infrared distance measuring sensor (31) is also provided below the fixed support (14).

6. The device for surface infiltration of wear-resistant inserts for aluminum pistons according to claim 1, characterized in that: The second melting crucible (30) includes an outer wall (16) and an inner wall (18), and a heat insulation layer (17) is provided between the outer wall (16) and the inner wall (18).

7. The device for surface infiltration of wear-resistant inserts for aluminum pistons according to claim 1, characterized in that: A third sealing ring (19) is provided on the inner side of the connection between the vent pipe (21) and the first melting crucible (29), and a fourth sealing ring (20) is provided on the outer side of the connection between the vent pipe (21) and the first melting crucible (29).

8. The device for surface infiltration of wear-resistant inserts for aluminum pistons according to claim 7, characterized in that: A flow controller (22) is also provided on the vent pipe (21).

9. The device for surface infiltration of wear-resistant inserts for aluminum pistons according to claim 1, characterized in that: A precision thermocouple (26) is also provided inside the cover plate (10), and the lower end of the precision thermocouple (26) extends into the molten aluminum (27).

10. The device for surface infiltration of wear-resistant inserts for aluminum pistons according to claim 1, characterized in that: The bottom of the first melting crucible (29) is provided with an adjustable bolt bracket (28).

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