Deslagging and derusting device for forged steel piston oil duct

Abstract

The utility model provides a slag and rust removal device for a forged steel piston oil duct, which is connected with a first oil cylinder and a third oil cylinder through a moving element. The first oil cylinder and the third oil cylinder move up and down to push oily liquid containing particles in the first oil cylinder to enter an oil channel of the first piston or oily liquid containing particles in the third oil cylinder to enter an oil channel of the second piston, and the oily liquid containing particles is generally called abrasive particle mixed liquid in the field; the anti-rust oil can be a combination of abrasive particles and anti-rust oil. Wherein the abrasive particles flowing at a high speed can wash off foreign matters such as welding slag, weld beading and rust on the inner surface of the oil duct, and the existence of the anti-rust oil can prevent the treated surface from being rusted for the second time. By means of continuous operation of the moving element, the purpose that oily liquid containing particulate matter flows and scours in the oil channel of the first piston or the second piston in a circulating and reciprocating mode can be achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of internal combustion engines, and particularly relates to a slag and rust removal device for a forged steel piston oil passage. Background Technique

[0002] Forged steel pistons (usually made of 42CrMoA) are widely used in heavy commercial vehicle internal combustion engines due to their high strength and good heat resistance. However, due to the limitations of the forging process, the prior art cannot form the internal cooling oil passage in the piston head during forging. Therefore, the forged steel piston blank (as shown in Figure 1 ) is generally forged in two parts: the piston head and the piston skirt, and then the forged head and skirt are welded together by a certain welding method, such as laser welding, electron beam welding, friction welding, etc.

[0003] The structural diagram of the forged steel piston obtained by welding is shown in Figure 2 . Since the piston head and the piston skirt are connected by welding, a large amount of welding slag, welding beads and rust are generated on both sides of the weld. The welding slag, welding beads and rust on the outside can be removed in the subsequent machining process, while the welding slag, welding beads and rust inside (in the oil passage) can only be removed by inserting a sandblasting nozzle into the inlet and outlet holes of the piston and using sandblasting.

[0004] However, the sandblasting removal method has the following disadvantages: (1) Sandblasting for slag and rust removal uses compressed air as the power and relies on the impact force of high-speed jetting quartz sand or iron sand to achieve slag and rust removal on the workpiece surface. However, since the piston oil passage is an annular structure, the metal nozzle cannot reach into the inner part of the oil passage, and the sandblasting method can only remove the welding slag, welding beads and rust in the area near the inlet and outlet holes of the oil passage; (2) The sandblasting rust removal process has dust pollution, high labor intensity, and the risk of operator injury; (3) The welding slag, welding beads and rust not removed in the oil passage under the working state of the piston will reduce the cooling effect of the piston oil passage, and may ultimately lead to too high temperature of the piston head; (4) The welding slag, welding beads and rust not removed in the oil passage may fall off due to high temperature and high pressure during the piston operation and flow together with the cooling engine oil, ultimately resulting in a series of problems such as engine piston cylinder pulling and oil filter clogging. Content of the Utility Model

[0005] In view of this, the purpose of the utility model is to provide a slag and rust removal device for a forged steel piston oil passage. This device can effectively remove the welding slag, welding beads and rust deep in the internal cooling oil passage of the forged steel piston, and can also prevent secondary rusting on the surface after treatment.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] In the first aspect, the utility model provides a slag and rust removal device for a forged steel piston oil passage, including:

[0008] The forged steel piston oil passage includes a first piston inner oil passage and a second piston inner oil passage;

[0009] A first oil cylinder and a second oil cylinder respectively communicating with the first piston inner oil passage through pipelines, and a third oil cylinder and a fourth oil cylinder respectively communicating with the second piston inner oil passage through pipelines. An oily liquid containing particulate matter is filled inside the first oil cylinder and the third oil cylinder;

[0010] A fuel tank communicating with the second oil cylinder through a one-way valve or a constant pressure valve; a fuel tank communicating with the fourth oil cylinder through a one-way valve or a constant pressure valve; hydraulic oil is filled inside the fuel tanks;

[0011] And

[0012] A moving element, which connects the first oil cylinder and the third oil cylinder and is used for pushing the oily liquid containing particulate matter in the first oil cylinder into the first piston or the oily liquid containing particulate matter in the third oil cylinder into the second piston by moving up and down.

[0013] Preferably, a pressing plate is arranged above the first piston.

[0014] Preferably, a pressing plate is arranged above the second piston.

[0015] Preferably, pistons are arranged inside the second oil cylinder and the fourth oil cylinder.

[0016] Preferably, hydraulic oil is filled above the pistons.

[0017] Preferably, limiting elements are arranged above the pistons inside the second oil cylinder and the fourth oil cylinder.

[0018] Preferably, the slag and rust removal device is further provided with a control element.

[0019] Preferably, the control element is connected to the moving element and is used for controlling the up and down movement of the moving element.

[0020] Preferably, the slag and rust removal device further includes 1 to 5 pistons connected in series with the first piston.

[0021] Preferably, the slag and rust removal device further includes 1 to 5 pistons connected in series with the second piston.

[0022] Preferably, the up and down movement distance of the moving element is 60 to 100 mm.

[0023] Preferably, the pipeline is communicated with the first piston inner oil passage or the second piston inner oil passage through an oil injection element.

[0024] Preferably, protective elements are provided inside the first oil cylinder, the second oil cylinder, the third oil cylinder, and the fourth oil cylinder.

[0025] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0026] The present utility model provides a slag and rust removal device for a forged steel piston oil passage. The device connects the first oil cylinder and the third oil cylinder through a moving element, and through up and down movement, it is used to push the oily liquid containing particulate matter in the first oil cylinder into the oil passage of the first piston or the oily liquid containing particulate matter inside the third oil cylinder into the oil passage of the second piston. Among them, the oily liquid containing particulate matter is generally called an abrasive mixture in the art and can be a combination of abrasives and rust preventive oil. Among them, the high-speed flowing abrasives can wash away foreign matters such as welding slag, welding beads, and rust on the inner surface of the oil passage, and the presence of rust preventive oil can prevent the treated surface from rusting again. The present utility model can achieve the purpose of the cyclic flow and flushing of the oily liquid containing particulate matter in the oil passage of the first piston or the second piston through the continuous operation of the moving element.

[0027] After testing, the surface roughness of the oil passage inside the piston processed by the slag and rust removal device for a forged steel piston oil passage provided by the present utility model is uniform, and slag and rust can be effectively removed.

[0028] In addition, the device provided by the present utility model improves the cooling effect during the operation of the piston, reduces the working load, and reduces the failure rate of the engine. At the same time, it avoids dust pollution and reduces the occurrence probability of occupational diseases. Description of the Drawings

[0029] Figure 1 is a structural schematic diagram of a forged steel piston blank in the prior art;

[0030] Figure 2 is a structural diagram of a forged steel piston obtained by welding in the prior art;

[0031] Figure 3 is a structural schematic diagram of the slag and rust removal device for a forged steel piston oil passage provided by the utility model in Embodiment 1;

[0032] Among them, 1 is the first piston, 11 is the pressing plate, 101 is the pipeline, 102 is the first oil cylinder, 103 is the second oil cylinder, 104 is the boosting spring, 105 is the one-way valve, 106 is the constant pressure valve, 107 is the first oil tank, 2 is the second piston, 21 is the pressing plate, 201 is the pipeline, 202 is the third oil cylinder, 203 is the fourth oil cylinder, 204 is the boosting spring, 205 is the one-way valve, 206 is the constant pressure valve, 207 is the second oil tank, 3 is the crank, 4 is the connecting rod, 5 is the swing rod, and moving elements 7 are connected to both ends of the swing rod;

[0033] Figure 4It is an enlarged view of the first piston;

[0034] Among them, 11 is the pressure plate, 12 is the fuel injector, 14 is the oil passage, 15 is the oil inlet hole, and 16 is the oil outlet hole;

[0035] Figure 5 It is an enlarged view of the first piston marked with dimensions;

[0036] Figure 6 It is a schematic diagram of the internal structure of the first oil cylinder, the second oil cylinder, the third oil cylinder, and the fourth oil cylinder in Embodiment 2;

[0037] Among them, 6 is the oil cylinder, 61 is the piston inside the oil cylinder, 62 is the cylinder barrel of the oil cylinder, and 63 is the ceramic insert sleeve arranged inside the oil cylinder;

[0038] Figure 7 It is a schematic diagram of the slag and rust removal device for the oil passage of the forged steel piston provided in Embodiment 3. Detailed implementation manners

[0039] Next, in combination with the embodiments of the present invention, the technical solutions of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0040] At present, in the prior art, generally, a sandblasting nozzle is inserted into the oil inlet and outlet holes of the piston, and then sandblasting is used to remove the welding slag, welding beads, and rust in the inner oil passage. However, the sandblasting method has the following disadvantages: ① Sandblasting for slag and rust removal generally uses compressed air as the power, and relies on the impact force of high-speed sprayed quartz sand or iron sand to achieve the purpose of removing slag and rust on the surface of the workpiece. However, since the piston oil passage is an annular structure, the metal nozzle cannot extend into the inner part of the oil passage, and the sandblasting method can only remove the welding slag, welding beads, and rust in the area near the oil inlet and outlet holes of the oil passage; ② The sandblasting rust removal process has problems such as dust pollution, high labor intensity, and the risk of damage to the operator's body; ③ The welding slag, welding beads, and rust that are not removed in the oil passage under the working state of the piston will reduce the cooling effect of the piston oil passage, and may ultimately lead to too high a temperature of the piston head; ④ The welding slag, welding beads, and rust that are not removed in the oil passage may fall off due to high temperature and high pressure during the operation of the piston, and flow together with the cooling engine oil, ultimately resulting in a series of problems such as piston seizure and oil filter clogging of the engine piston.

[0041] Based on the above problems, the present invention provides a slag and rust removal device for the oil passage of a forged steel piston, and its schematic diagram is as Figure 3 shown, and it includes:

[0042] The forged steel piston oil passage includes an oil passage 14 inside the first piston 1 and an oil passage 14 inside the second piston 2;

[0043] A first oil cylinder 102 and a second oil cylinder 103 respectively connected to the oil passage 14 inside the first piston 1 through a pipeline 101, and a third oil cylinder 202 and a fourth oil cylinder 203 respectively connected to the oil passage 14 inside the second piston 2 through a pipeline 201. An oily liquid containing particulate matter is filled inside both the first oil cylinder 102 and the third oil cylinder 202;

[0044] A first oil tank 107 connected to the second oil cylinder 103 through a one-way valve 105 or a constant pressure valve 106; a second oil tank 207 connected to the fourth oil cylinder 203 through a one-way valve 205 or a constant pressure valve 206; Hydraulic oil is filled inside both the first oil tank 107 and the second oil tank 207;

[0045] And

[0046] A moving element 7, the moving element 7 connects the first oil cylinder 102 and the third oil cylinder 202, and is used to push the oily liquid containing particulate matter in the first oil cylinder 102 into the oil passage 14 inside the first piston 1 or the oily liquid containing particulate matter inside the third oil cylinder 202 into the oil passage 14 inside the second piston 2 by moving up and down.

[0047] It should be noted that the first oil tank 107 and the second oil tank 207 can be 1 oil tank, shared with each other, or can be set as two oil tanks according to needs.

[0048] In the present utility model, a control element is further provided in the slag removal and rust removal device. The control element is connected to the moving element 7 and is used to control the up and down movement of the moving element 7. The up and down movement distance of the moving element 7 is not limited and can be adjusted according to actual needs, such as including but not limited to 60mm, 65mm, 70mm, 75mm, 80mm, 85mm, 90mm, 95mm or 100mm, etc.

[0049] In some embodiments of the present utility model, the control element includes a crank 3, a connecting rod 4 and a swing rod 5 connected in sequence.

[0050] In the present utility model, first, the pressure value of the constant pressure valve is set according to the process requirements (this pressure is the working pressure). Among them, the oil passage 14 inside the first piston 1 is connected to the first oil cylinder 102 and the second oil cylinder 103 through a pipeline 101. The oil passage 14 inside the second piston 2 is connected to the third oil cylinder 202 and the fourth oil cylinder 203 through a pipeline 201.

[0051] In the present utility model, an enlarged view of the first piston 1 is as Figure 4As shown, it includes a pressing plate 11, an injector nozzle 12, an oil passage 14, an oil inlet hole 15, and an oil outlet hole 16. The second piston 2 has the same structure.

[0052] In some embodiments of the present invention, the crank 3 is driven by a motor, causing the swing rod 5 to move from position II to position I. At this time, the oily liquid containing particulate matter filled in the first oil cylinder 1 passes through an injection element, such as the injector nozzle 12, enters the oil passage 14 in the first piston 1 through the oil inlet hole 15. Among them, the oily liquid containing particulate matter is the abrasive mixed oil well-known to those skilled in the art, generally composed of sharp abrasives such as alumina, silicon carbide, or cubic boron nitride and rust preventive oil mixed in a volume ratio of 1:(1-2). The abrasive mixed oil fills the oil passage 14 in the first piston 1. After flushing, it preferably enters the second oil cylinder 103 through the oil outlet hole 16 and the injector nozzle 12, and pushes the piston in the second oil cylinder 103 upward, so that the hydraulic oil above the piston flows into the first oil tank 107 through the constant pressure valve 106.

[0053] At this time, the hydraulic oil in the second oil tank 207 flows into the upper part of the fourth oil cylinder 203 through the one-way valve 205. The abrasive mixed oil filled in the fourth oil cylinder 203 passes through an injection element, such as the injector nozzle 12, enters the oil passage 14 in the second piston 2 through the oil inlet hole 15. The abrasive mixed oil fills the oil passage 14 in the second piston 2. After flushing, it preferably enters the third oil cylinder 202 through the oil outlet hole 16 and the injector nozzle 12.

[0054] In some other embodiments of the present invention, the crank 3 is driven by a motor, causing the swing rod 5 to move from position I to position II. At this time, the abrasive mixed liquid in the second oil cylinder 103 flows into the oil passage 14 in the first piston 1 through the pipeline 101, the injector nozzle 12, and the oil outlet hole 16 and fills the oil passage 14 in the first piston 1. After flushing, it flows back into the first oil cylinder 102 through the oil inlet hole 15, the injector nozzle 12, and the pipeline 101 again. At the same time, the hydraulic oil in the first oil tank 107 flows into the upper part of the second oil cylinder 103 through the one-way valve 105.

[0055] Similarly, the abrasive mixed oil filled in the third oil cylinder 202 flows into the oil passage 14 in the second piston 2 through the pipeline 201, the injector nozzle 12, and the oil inlet hole 15 and fills the oil passage 14 in the second piston 2. After flushing, it flows back into the fourth oil cylinder 203 through the oil outlet hole 16, the injector nozzle 12, and the pipeline 201 again, and pushes the piston in the fourth oil cylinder 203 upward, so that the hydraulic oil above the piston flows into the second oil tank 207 through the constant pressure valve 206.

[0056] Due to the presence of sharp abrasives, to prevent the key components of the above slag and rust removal device from wearing out too quickly and affecting production efficiency, the present utility model preferably provides protection elements inside the first oil cylinder 102, the second oil cylinder 103, the third oil cylinder 202, and the fourth oil cylinder 203, such as Figure 6 as shown. The protection element can be a ceramic insert 63. At the same time, the material of the fuel injector is preferably a ceramic material.

[0057] It should be noted that due to the setting of the pressure value of the constant pressure valve 105 or 205, the abrasive mixed oil is a high-pressure abrasive mixed oil with the corresponding pressure set by the constant pressure valve 105 or 205. And the pressure of the abrasive mixed oil can be adjusted in real time according to the constant pressure valve 105 or 205.

[0058] Through the reciprocating cycle of the above swing rod from position I to position II, the present utility model can realize the reciprocating flow of the high-pressure abrasive mixed liquid inside the oil passage 14 of the first piston 1 or inside the oil passage 14 of the second piston 2. In addition, since the abrasive mixed oil is composed of sharp abrasives and rust preventive oil, under the high-pressure working state, it can not only achieve excellent scouring effect and quickly remove welding slag, welding tumors, and rust inside the oil passage, but also effectively prevent the surface after treatment from rusting again.

[0059] In some preferred embodiments of the present utility model, a pressing plate 11 is provided above the first piston 1, and a pressing plate 11 is also provided above the second piston 2. Among them, the function of the pressing plate is to prevent the abrasive mixed oil from leaking at the connection, and at the same time press the first piston and the second piston to prevent loosening. The pressing plate can also press the fuel injector to prevent it from falling off due to high pressure.

[0060] In some preferred embodiments of the present utility model, pistons are provided inside the second oil cylinder 103 and the fourth oil cylinder 203, and hydraulic oil is filled above the pistons. Here, it should be noted that since the constant pressure valves 105 and 205 are hydraulic components and hydraulic oil needs to flow through them during normal operation, there needs to be hydraulic oil above the second oil cylinder 103 and the fourth oil cylinder 203.

[0061] At the same time, to prevent the piston from moving too fast, the present utility model preferably provides limit elements above the pistons of the first oil cylinder 103 and above the pistons of the second oil cylinder 203 for safety protection. In some embodiments of the present utility model, the limit elements are assist springs 104 or 204.

[0062] According to the size of the piston structure and production efficiency, expansion pipelines and pistons can also be added to the device (such as Figure 7As shown in the figure, the production efficiency and energy utilization rate of the system are improved. Specifically, in some embodiments of the present invention, the slag and rust removal device further includes 1 to 5 pistons connected in series with the first piston 1 and 1 to 5 pistons connected in series with the second piston 2.

[0063] In summary, through the continuous operation of the swing rod 5, the present invention controls the continuous up and down movement of the moving element 7, so that the high-pressure abrasive mixed oil can circulate and flow back and forth in the oil passage 14 of the first piston 1 or the second piston 2, achieving effective slag and rust removal.

[0064] The present invention uses the average surface roughness Ra, that is, the absolute value of the average deviation of the workpiece surface height within a certain measurement length, to prove the slag and rust removal effect in the oil passage. The smaller the Ra value, the smoother the surface and the better the slag and rust removal effect.

[0065] After testing, when using the device provided by the present invention, when the working pressure is above 1 MPa and the treatment time is above 120 s, the surface roughness Ra of the treated oil passage is below 3.2, indicating excellent slag and rust removal effect in the oil passage.

[0066] It should be noted that the present invention does not particularly limit the specifications of the above-mentioned first oil cylinder 102, second oil cylinder 103, third oil cylinder 202 and fourth oil cylinder 203, as well as the specifications of the pipelines 101 and 201, which can be designed according to needs. According to the cross-sectional area and diameter of the general forged steel piston oil passage, the inner diameters of the first oil cylinder 102, second oil cylinder 103, third oil cylinder 202 and fourth oil cylinder 203 of the present invention are selected to be Ф50 - Ф60 mm, and the inner diameters of the pipelines 101 and 201 involved are Ф15 - Ф20 mm.

[0067] In order to further illustrate the present invention, the following detailed description is provided through the following embodiments. The experimental raw materials used in the following embodiments of the present invention are all general commercially available products.

[0068] Example 1

[0069] This embodiment provides a slag and rust removal device for a forged steel piston oil passage, and its structural schematic diagram is as Figure 3 shown, including:

[0070] A first oil cylinder 102 and a second oil cylinder 103 respectively connected to the oil passage 14 in the first piston 1 through a pipeline 101. A pressing plate 11 is arranged above the first piston 1, and a boosting spring 104 is arranged inside the second oil cylinder 4;

[0071] A first oil tank 107 connected to the second oil cylinder 103 through a one-way valve 105 or a constant pressure valve 106;

[0072] and

[0073] A third oil cylinder 202 and a fourth oil cylinder 203 respectively connected to the second piston 2 through a pipeline 201. A pressing plate 21 is arranged above the second piston 2, and a boosting spring 204 is arranged inside the fourth oil cylinder 203;

[0074] A second oil tank 207 connected to the fourth oil cylinder 203 through a one-way valve 205 or a constant pressure valve 206;

[0075] and

[0076] A swing rod 5;

[0077] A connecting rod 4 connected to the swing rod 5;

[0078] A crank 3 connected to the connecting rod 4;

[0079] Moving elements 7 are arranged at both ends of the swing rod 5, and the moving elements 7 are used to push the liquid inside the first oil cylinder 102 or the fourth oil cylinder 203.

[0080] In this embodiment, the first oil cylinder 102 and the fourth oil cylinder 203 are both filled with abrasive mixed oil, and the abrasive mixed oil is composed of silicon carbide and rust preventive oil according to a volume ratio of 1:2.

[0081] The first oil tank 107 and the second oil tank 207 are both filled with hydraulic oil.

[0082] In this embodiment, an enlarged view of the first piston 1 is as shown in Figure 4 and includes a pressing plate 11, an injection nozzle 12, an oil passage 13, an oil inlet hole 14, and an oil outlet hole 15. The second piston has the same structure.

[0083] Among them, the cylinder diameters Ф of the above-mentioned first oil cylinder 102, second oil cylinder 103, third oil cylinder 202, and fourth oil cylinder 203 are all 148 mm, the outer diameter of the oil passage 14 is Ф120 mm, the height is 28 mm, and the cross-sectional area S of the oil passage 14 = 500.7 mm 2 , and the schematic diagram is as shown in Figure 5 .

[0084] Working state:

[0085] First, set the pressure values of the constant pressure valves 106 and 206;

[0086] After the motor drives the crank 3, the crank 3 rotates at a speed of 60 r / min and controls the swing rod 5 to move from position II to position I (the descending distance is 65 mm) through the connecting rod 4, and controls the time, so that the abrasive mixture in the first oil cylinder 102 flows through the pipeline 101, enters the oil passage 14 of the first piston 1 through the fuel injector 12 and the oil inlet hole 15, fills the oil passage 14. After the flushing is completed, it then flows through the oil outlet hole 16, the fuel injector 12, and through the pipeline 101 into the second oil cylinder 103. At this time, the abrasive mixture pushes the piston of the second oil cylinder 103 to move upward, the boosting spring 104 is compressed, and the hydraulic oil above the second oil cylinder 103 flows into the first oil tank 107 through the constant pressure valve 106. At the same time, the hydraulic oil in the second oil tank 207 flows into the upper part of the fourth oil cylinder 203 through the one-way valve 205, the boosting spring 204 is stretched, so that the abrasive mixture in the fourth oil cylinder 203 flows through the pipeline 201, enters the oil passage 14 of the second piston 2 through the fuel injector and the oil inlet hole, fills the oil passage 14. After the flushing is completed, it then flows through the oil outlet hole, the fuel injector, and through the pipeline 201 into the third oil cylinder 202.

[0087] After the motor drives the crank 3, the crank 3 rotates at a speed of 60 r / min and controls the swing rod 5 to move from position I to position II through the connecting rod 4, and controls the time. At this time, the hydraulic oil in the first oil tank 1 flows into the upper part of the second oil cylinder 103 through the one-way valve 105, the boosting spring 104 is stretched, so that the abrasive mixture in the second oil cylinder 103 flows into the inner oil passage 14 of the first piston 1 through the pipeline 101 and fills the oil passage 14. After the flushing is completed, it flows back into the first oil cylinder 102 again. At the same time, the abrasive mixture filled in the third oil cylinder 202 flows into the inner oil passage 14 of the second piston 2 and fills the oil passage 14. After the flushing is completed, it flows back into the fourth oil cylinder 203 again. At the same time, the abrasive mixture pushes the piston of the third oil cylinder 202 to move upward, the boosting spring 204 is compressed, and the hydraulic oil above the fourth oil cylinder 203 flows into the second oil tank 207 through the constant pressure valve 206.

[0088] In this embodiment, through the pressure settings of the constant pressure valves 106 and 206, and the reciprocating cycle of the swing rod 5 from position I to position II, the effect of the high-pressure abrasive mixture flowing in a reciprocating manner and flushing in the oil passages 14 of the first piston 1 and the oil passage 14 of the second piston 2 is achieved.

[0089] According to the above working state, the embodiment cleans the oil passage according to the pressure and time respectively as shown in Table 1 below, and the results are as shown in Table 1 below: (The following table shows the surface roughness value Ra of the piston oil passage after being processed by the present invention under different working pressures and process times. The Ra is measured by a roughness meter and is the average value of the oil passage 14 in the first piston 1 and the oil passage 14 in the second piston 2)

[0090] Table 1

[0091]

[0092] As can be seen from Table 1, when the working pressure is above 1 MPa and the treatment time is above 120 s, the surface roughness Ra of the treated oil passage is below 3.2, indicating excellent slag and rust removal effects inside the oil passage.

[0093] However, the prior art uses a sandblasting process (sandblasting pressure 0.4 Mpa, time 120 - 180 s) for rust and slag removal. The surface roughness near the inlet and outlet holes can reach Ra6.3 - Ra3.2, but the surface roughness deep inside the oil passage is still above Ra12.5. Moreover, when the sandblasting pressure and sandblasting time are increased again, there is no significant change in the slag removal effect.

[0094] Therefore, the device provided by the present utility model is more effective.

[0095] Embodiment 2

[0096] The slag and rust removal device for the forged steel piston oil passage in this embodiment has a structural schematic diagram as Figure 3 shown, which is consistent with Embodiment 1.

[0097] Compared with Embodiment 1, the difference lies in that the internal structural schematic diagrams of the first oil cylinder, the second oil cylinder, the third oil cylinder, and the fourth oil cylinder are as Figure 6 shown, where 6 is the oil cylinder, 61 is the piston inside the oil cylinder, 62 is the cylinder barrel of the oil cylinder, and 63 is the ceramic insert sleeve arranged inside the oil cylinder.

[0098] Embodiment 3

[0099] The slag and rust removal device for the forged steel piston oil passage in this embodiment has a structural schematic diagram as Figure 7 shown.

[0100] Compared with Embodiment 1, the difference lies in that the first piston 1 is also connected in series with a third piston 1 - 1; the second piston 2 is also connected in series with a fourth piston 2 - 1.

[0101] The working state refers to Embodiment 1.

[0102] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. 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 utility model. Therefore, the present utility model 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 slag and rust removal device for a forged steel piston oil passage, characterized in that, Comprising: The forged steel piston oil passage includes a first piston inner oil passage and a second piston inner oil passage; A first oil cylinder and a second oil cylinder respectively connected to the first piston inner oil passage through pipelines, and a third oil cylinder and a fourth oil cylinder respectively connected to the second piston inner oil passage through pipelines. The interiors of the first oil cylinder and the third oil cylinder are filled with an oily liquid containing particulate matter; A fuel tank connected to the second oil cylinder through a one-way valve or a constant pressure valve; a fuel tank connected to the fourth oil cylinder through a one-way valve or a constant pressure valve; the interiors of the fuel tanks are filled with hydraulic oil; And A moving element, which is connected to the first oil cylinder and the third oil cylinder and is used for pushing the oily liquid containing particulate matter in the first oil cylinder into the first piston or the oily liquid containing particulate matter in the third oil cylinder into the second piston by moving up and down.

2. The slag and rust removal device for the forged steel piston oil passage according to claim 1, characterized in that, A pressing plate is arranged above the first piston; A pressing plate is arranged above the second piston.

3. The slag and rust removal device for the forged steel piston oil passage according to claim 1, characterized in that, Pistons are arranged inside the second oil cylinder and the fourth oil cylinder; The upper part of the piston is filled with hydraulic oil.

4. The slag and rust removal device for the forging steel piston oil passage according to claim 3, wherein Limit elements are arranged above the pistons inside the second oil cylinder and the fourth oil cylinder.

5. The slag and rust removal device for the forging steel piston oil passage according to claim 1, characterized in that, The slag and rust removal device is also provided with a control element; The control element is connected to the moving element and is used for controlling the up and down movement of the moving element.

6. The slag and rust removal device for the forged steel piston oil passage according to claim 1, characterized in that, The slag and rust removal device further includes 1 to 5 pistons connected in series with the first piston.

7. The slag and rust removal device for the forged steel piston oil passage according to claim 1 or 6, characterized in that, The slag and rust removal device further includes 1 to 5 pistons connected in series with the second piston.

8. The slag and rust removal device for the forged steel piston oil passage according to claim 1, characterized in that, The up and down movement distance of the moving element is 60 to 100 mm.

9. The slag and rust removal device for the forging steel piston oil passage according to claim 1, characterized in that, The pipeline is connected to the first piston inner oil passage or the second piston inner oil passage through an oil injection element.

10. The slag and rust removal device for the forged steel piston oil passage according to claim 1, characterized in that, Protection elements are arranged inside the first oil cylinder, the second oil cylinder, the third oil cylinder and the fourth oil cylinder.

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