A lubricating medium spraying device for a roll of a roll forging machine

Abstract

The utility model discloses a kind of lubricating medium spraying devices of roll forging machine roll, characteristics are including mounting shaft and spray valve unit, spray valve unit can be axially slippable and be rotatably angularly arranged on mounting shaft;Spray valve unit includes valve body, and liquid inlet passage, gas inlet, mixing cavity, atomizing nozzle and gas control port are equipped on valve body;Valve core is movably arranged in valve body, and its head is equipped with sealing surface;Elastic reset piece is used to apply to valve core the force that makes sealing surface adhere to the matching sealing surface on valve body to cut off the communication of liquid inlet passage and mixing cavity;Piston is arranged on valve core, and compressed air that gas control port is communicated acts on piston, pushes valve core to overcome the force of elastic reset piece and moves, makes sealing surface separate from matching sealing surface, realizes the communication of liquid inlet passage and mixing cavity;Flow regulating mechanism is used to adjust the opening gap between sealing surface and matching sealing surface;Gas inlet is communicated with mixing cavity, and atomizing nozzle is communicated with mixing cavity.The advantage is that flow and position are independently adjustable.

Description

Technical Field

[0001] This utility model relates to the field of metal forging technology, and in particular to a lubricating medium spraying device for rolls of a roll forging mill. Background Technology

[0002] A roll forging machine is a metal processing equipment that uses a pair of relatively rotating rolls to continuously and locally plastically shape a billet, causing its cross-section to gradually decrease and its length to gradually extend. It is widely used in the production of preforms for parts in the automotive, aerospace, and engineering machinery industries.

[0003] During roll forging, intense friction occurs between the rolls and the billet. Taking aluminum alloy roll forging as an example, the billet is typically heated to a high temperature of 520-540℃ to improve plasticity and reduce deformation resistance, while the roll dies are usually made of steel, with an operating temperature of approximately 200-250℃. Under these temperature conditions, when the high-temperature aluminum bar comes into contact with the steel die, a very high coefficient of friction is generated due to the significant difference in material properties, the high interface temperature, and the high pressure. Meanwhile, aluminum has the characteristics of high chemical activity and easy adhesion. Under high temperature and high pressure, it is easy to stick to the mold surface, which leads to the following series of problems: (1) The high friction coefficient makes the torque required during the rolling process significantly increase, which increases the load on the equipment and may even cause the equipment to overload and stop; (2) Aluminum material adheres to the mold surface and forms built-up edge, which scratches the surface of subsequent billets, causing defects such as surface scratches and marks on the product, and in severe cases, it is scrapped directly; (3) The adhesion phenomenon exacerbates the wear and thermal fatigue of the mold surface, reduces the service life of the mold, and increases the production cost; (4) The adhesion between the billet and the mold increases the demolding resistance, affects the production cycle, and may even cause the billet to jam.

[0004] Therefore, effective lubrication of the roll die surface is essential during roll forging. The current common practice is to spray a lubricating medium (such as hydraulic oil or a specialized lubricant) onto the die surface to form a lubricating film between the die and the billet. This reduces the coefficient of friction, decreases adhesion, lowers rolling torque, protects the die surface, and improves product surface quality.

[0005] Existing equipment often uses thin copper tubes to spray lubricating media. The specific structure is as follows: a main copper tube serves as the main path, with one end connected to both a hydraulic oil source and a compressed air source. Several thin copper tubes are radially connected to the main copper tube, extending to the vicinity of each pass in the mold. During operation, hydraulic oil and compressed air simultaneously enter from one end of the main copper tube and mix. The gas-liquid two-phase fluid is then separated by the thin copper tubes and sprayed onto the mold surface. This structure has the following drawbacks:

[0006] (1) When gas and liquid share the same channel, they are prone to forming slug flow or annular flow when mixed in the main copper tube, resulting in inconsistent gas-liquid ratios in each branch, with some appearing as columnar or large droplets rather than mist. More importantly, it is difficult to precisely coordinate the start and stop times of air and oil intake—when oil is introduced first and then air is introduced, the pipeline is filled with pure oil first, and the subsequent air cannot be effectively atomized; when air is introduced first and then oil is introduced, the initial spraying of pure air causes lubrication delay; when stopped, the residual oil in the pipeline continues to drip, and improper timing control will seriously affect the atomization quality.

[0007] (2) All branches share a main copper pipe and the same valve. Each pass sprays or stops at the same time. However, in actual production, the deformation of the previous pass is large and requires more lubrication, while the subsequent pass requires less lubrication. Unified control results in a lot of waste. Moreover, excessive hydraulic oil sprayed on the mold surface at 200~250℃ can easily cause open flames, posing a major safety hazard. Furthermore, the position and angle of each thin copper pipe cannot be adjusted individually, making it difficult to accurately align with the mold surface of different passes.

[0008] (3) The end of the thin copper tube is normally open and has no shut-off valve. After the oil and gas supply is stopped, the residual oil in the pipeline will continue to leak and drip under the action of gravity, causing waste and environmental pollution. In addition, the local excessive lubrication during the next rolling process also poses a risk of open flame.

[0009] (4) The flow rate of each branch is determined by its inner diameter and the pressure of the main road. Once installed, it is fixed and cannot be adjusted independently and finely according to the actual needs of each route. Summary of the Invention

[0010] The technical problem to be solved by this utility model is to provide a lubricating medium spraying device for the rolls of a rolling forging mill, so as to solve the problems of uncontrollable atomization effect, uneven spraying, inability to independently control multiple passes, lack of self-stop function and inability to independently adjust the flow rate in the existing fine copper tube lubrication method.

[0011] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0012] A lubricating medium spraying device for a roll forging mill includes:

[0013] The mounting shaft and multiple spray valve units are provided. The spray valve units can slide along the axial direction of the mounting shaft and are rotatably mounted on the mounting shaft. The number of spray valve units is matched with the number of rolling passes on the roll die of the roll forging mill. One spray valve unit corresponds to one rolling pass.

[0014] The spray valve unit includes:

[0015] The valve body is provided with a liquid inlet channel, a gas inlet, a mixing chamber, an atomizing nozzle, and a gas control port.

[0016] A valve core is movably disposed within the valve body, and a sealing surface is provided at the head of the valve core.

[0017] An elastic reset element is used to apply a force to the valve core to make the sealing surface press tightly against the mating sealing surface provided on the valve body to cut off the connection between the liquid inlet channel and the mixing chamber, forming a normally closed structure.

[0018] A piston is mounted on the valve core and can be moved synchronously with the valve core within the valve body. Compressed air introduced through the pneumatic control port acts on the piston, pushing the valve core to move against the force of the elastic reset member, causing the sealing surface to disengage from the mating sealing surface, thereby achieving communication between the liquid inlet channel and the mixing chamber.

[0019] A flow regulating mechanism is used to adjust the opening gap between the sealing surface of the valve core head and the mating sealing surface to control the flow rate of the lubricating medium flowing into the mixing chamber.

[0020] The gas inlet is connected to the mixing chamber and is used to introduce compressed air to break the lubricating medium in the mixing chamber into a mist.

[0021] The atomizing nozzle is connected to the mixing chamber and is used to spray out a mist of lubricating medium.

[0022] The valve body is provided with a liquid chamber, and the liquid inlet channel is connected to one end of the liquid chamber. The valve body is also provided with a liquid outlet channel, which is connected to the other end of the liquid chamber. The liquid chamber and the mixing chamber can be selectively connected through the gap between the sealing surface and the mating sealing surface. The liquid outlet channel on one of the spray valve units is used to connect in series with the liquid inlet channel of the adjacent spray valve unit, so that the lubricating medium flows through multiple spray valve units connected in series in sequence.

[0023] The atomizing nozzle has multiple nozzles, which are evenly distributed along the circumferential direction.

[0024] The flow regulating mechanism includes an adjusting screw, which is rotatably mounted on the valve body. One end of the adjusting screw extends into the valve body and is opposite to or in contact with the end of the valve core away from its sealing surface. The other end of the adjusting screw extends out of the valve body. The opening gap between the sealing surface and the mating sealing surface can be adjusted by rotating the adjusting screw.

[0025] The sealing surface is a conical surface, and the outer diameter of the conical surface gradually decreases along the direction close to the mating sealing surface; the mating sealing surface is a conical surface that mates with the conical surface.

[0026] The spray valve unit is mounted on the mounting shaft via a mounting base;

[0027] The mounting base has a through mounting hole, and the mounting shaft passes through the mounting hole;

[0028] The mounting base is also provided with an opening that communicates with the mounting hole, and the opening divides the corresponding part of the mounting base into a first mounting part and a second mounting part.

[0029] The first mounting part and the second mounting part are adjustablely connected by fasteners. By adjusting the fasteners, the clamping force between the mounting hole and the mounting shaft can be changed, thereby realizing the locking and releasing of the axial sliding and rotation angle of the spray valve unit on the mounting shaft.

[0030] It also includes a mounting beam, on which two mounting blocks are spaced apart, and the two ends of the mounting shaft are respectively mounted on the two mounting blocks;

[0031] The mounting block is provided with a rotating shaft mounting hole that mates with the mounting shaft, and the mounting shaft passes through the rotating shaft mounting hole.

[0032] The mounting block is also provided with a shaft opening that communicates with the shaft mounting hole. The shaft opening divides the corresponding part of the mounting block into a first clamping part and a second clamping part.

[0033] The first clamping part and the second clamping part are adjustablely connected by a first fastener. By adjusting the first fastener, the clamping force between the rotating shaft mounting hole and the mounting shaft can be changed, thereby locking and releasing the rotation angle of the mounting shaft on the mounting block, which in turn drives all the spray valve units on the mounting shaft to rotate synchronously.

[0034] The mounting beam is provided with a mounting rod, the central axis of which is perpendicular to the central axis of the mounting shaft; the two mounting blocks are slidably mounted on the mounting rod along its axial direction.

[0035] The mounting block is provided with a through mounting cavity that mates with the mounting rod, and the mounting rod passes through the mounting cavity. The mounting block is also provided with a notch that communicates with the mounting cavity, and the notch divides the corresponding part of the mounting block into a third clamping part and a fourth clamping part. The third clamping part and the fourth clamping part are adjustablely connected by a second fastener. By adjusting the second fastener, the clamping force between the mounting cavity and the mounting rod can be changed, thereby locking and releasing the axial sliding of the two mounting blocks on the mounting rod.

[0036] The two ends of the mounting shaft extend out of the two mounting blocks respectively. A limit ring is detachably provided on the extended end of the mounting shaft. The limit ring is used to restrict the axial movement of the mounting shaft relative to the mounting block. The limit ring is formed by two halves joined together and the two halves are detachably connected.

[0037] Compared with the prior art, the advantages of this utility model are:

[0038] (1) Uniform atomization: Through the independently set gas inlet and mixing chamber, compressed air breaks the lubricating medium into a mist in real time in the mixing chamber, avoiding the problem of poor atomization caused by the sharing of the same channel between gas and liquid and the difficulty in coordinating the timing of air and oil intake in the prior art, ensuring that the sprayed lubricating medium is a fine and uniform mist, forming a continuous and uniform lubricating film on the mold surface.

[0039] (2) Normally closed self-stop: The valve core sealing surface is tightly pressed against the mating sealing surface by the elastic reset element to form a normally closed structure. It automatically closes when the gas is cut off, with no leakage and rapid response. This solves the problem of continuous oil leakage after the end of the thin copper tube is normally open in the existing technology, and improves safety and media utilization.

[0040] (3) Independently adjustable flow rate: The opening gap between the sealing surface and the mating sealing surface is adjusted by the flow rate adjustment mechanism. Each spray valve unit can independently adjust the flow rate of the lubricating medium, which solves the problem that the flow rate of each branch cannot be independently and finely adjusted in the existing technology, and meets the differentiated lubrication needs of different passes.

[0041] (4) Independent control of multiple passes: By setting multiple spray valve units, the number of which matches the number of rolling passes and corresponds one-to-one, each spray valve unit can be independently controlled to open and close, which solves the problem of simultaneous spraying of all passes in the prior art and avoids the waste of lubricating medium and the risk of high temperature open flame.

[0042] (5) Independently adjustable position: The spray valve unit can slide axially and rotate at an angle on the mounting shaft, so that each spray valve unit can be independently adjusted in position and angle to accurately align with its corresponding rolling pass, which solves the problem that the position and angle of each fine copper tube cannot be adjusted individually in the prior art. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0044] Figure 2 This is an exploded structural diagram of the present invention;

[0045] Figure 3 This is a three-dimensional structural diagram of the mounting block in this utility model;

[0046] Figure 4 This is a three-dimensional structural diagram of the spray valve unit in this utility model;

[0047] Figure 5 This is a first cross-sectional view of the spray valve unit in the normally closed state of this utility model;

[0048] Figure 6 This is a second cross-sectional view of the spray valve unit in the normally closed state of this utility model;

[0049] Figure 7 This is a cross-sectional view of the spray valve unit in the open state of this utility model.

[0050] Figure 8 for Figure 7 A magnified structural diagram of point A in the middle. Detailed Implementation

[0051] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0052] like Figures 1 to 8 As shown, a lubricating medium spraying device for a roll forging mill includes:

[0053] Mounting shaft 1 and multiple spray valve units 2, the spray valve units 2 can slide along the axial direction of mounting shaft 1 and are rotatably mounted on mounting shaft 1. The number of spray valve units 2 is matched with the number of rolling passes on the roll die of the roll forging mill, one spray valve unit 2 corresponds to one rolling pass.

[0054] Spray valve unit 2 includes:

[0055] The valve body 21 is provided with a liquid inlet channel 211, a gas inlet 212, a mixing chamber 213, an atomizing nozzle 22 and a gas control port 214.

[0056] The valve core 23 is movably disposed within the valve body 21, and the head of the valve core 23 is provided with a sealing surface 230;

[0057] The elastic reset member 24 is used to apply a force to the valve core 23 to make the sealing surface 230 tightly adhere to the mating sealing surface 215 provided on the valve body 21 to cut off the connection between the liquid inlet channel 211 and the mixing chamber 213, forming a normally closed structure.

[0058] Piston 231 is mounted on valve core 23 and can be moved synchronously with valve core 23 inside valve body 21. Compressed air introduced through pneumatic control port 214 acts on piston 231, pushing valve core 23 to move against the force of elastic reset member 24, causing sealing surface 230 to disengage from mating sealing surface 215, thereby realizing the connection between liquid inlet channel 211 and mixing chamber 213.

[0059] The flow regulating mechanism is used to adjust the opening gap J between the sealing surface 230 of the valve core 23 head and the mating sealing surface 215 to control the flow rate of the lubricating medium flowing into the mixing chamber 213.

[0060] Gas inlet 212 is connected to mixing chamber 213 and is used to introduce compressed air to break the lubricating medium in mixing chamber 213 into a mist.

[0061] The atomizing nozzle 22 is connected to the mixing chamber 213 and is used to spray out a mist of lubricating medium.

[0062] In this specific embodiment, the opening gap J between the sealing surface 230 and the mating sealing surface 215 is set to 0-3mm. This results in a wide flow adjustment range with high precision; a short stroke and fast response; a zero closing gap for reliable sealing; and no leakage when normally closed.

[0063] In this specific embodiment, the valve body 21 is provided with a liquid chamber 2021, and the inlet channel 211 is connected to one end of the liquid chamber 2021. The valve body 21 is also provided with an outlet channel 216, which is connected to the other end of the liquid chamber 2021. The liquid chamber 2021 and the mixing chamber 213 can be selectively connected through the gap between the sealing surface 230 and the mating sealing surface 215. The outlet channel 216 of one spray valve unit 2 is used to connect in series with the inlet channel 211 of its adjacent spray valve unit 2, so that the lubricating medium flows through multiple spray valve units connected in series in sequence. Multiple spray valve units 2 are connected in series through the inlet channel 211 and the outlet channel 216, eliminating the need for separate liquid supply pipelines and simplifying the pipeline layout. The liquid chamber 2021 runs through without dead corners, ensuring that the lubricating medium always flows and avoiding blockage. When the valve core 23 is opened, part of the medium enters the mixing chamber for atomization and spraying, while the rest continues to supply liquid to the rear end. Each valve unit does not interfere with the others, allowing for flexible control.

[0064] In this specific embodiment, the flow regulation mechanism includes an adjusting screw 25, which is rotatably mounted on the valve body 21. One end of the adjusting screw 25 extends into the valve body 21 and is opposite to or in contact with the end of the valve core 23 away from its sealing surface 230. The other end of the adjusting screw 25 extends out of the valve body 21. By rotating the adjusting screw 25, the opening gap J between the sealing surface 230 and the mating sealing surface 215 can be adjusted. This adjustment method has a simple structure, is easy to operate, and has high adjustment accuracy, which can meet the differentiated requirements of lubricating medium flow rate for different passes.

[0065] In this specific embodiment, the valve body 21 has a split structure, including an upper valve block 201, a middle valve block 202, and a lower valve block 203 arranged sequentially from top to bottom. The valve blocks are detachably fixedly connected, and sealing elements are provided at each connection surface. This split structure of the valve body 21 facilitates the processing and assembly of the internal components.

[0066] In this specific embodiment, an air chamber 2011 is provided inside the upper valve block 201, and the piston 231 is movably disposed inside the air chamber 2011. The air control port 214 communicates with the air chamber 2011 through a gas passage 2140 disposed inside the valve body 21. A valve cover 2012 is sealed and installed on the upper opening of the upper valve block 201. The elastic reset member 24 is a compression spring, disposed between the valve cover 2012 and the piston 231, and sleeved on the valve core 23, for providing a downward closing force to the valve core 23. An internal thread adjustment hole (not shown in the figure) is provided on the valve cover 2012, and an adjustment screw 25 is screwed into the internal thread adjustment hole.

[0067] In this specific embodiment, a liquid chamber 2021 is provided inside the central valve block 202. An inlet channel 211 and an outlet channel 216 are respectively connected to both ends of the liquid chamber 2021. The inlet channel 211 is located on one side of the central valve block 202 or introduced through a liquid connector, while the outlet channel 216 is located on the other side of the central valve block 202 and is used to connect in series with the inlet channel 211 of the adjacent spray valve unit 2. The liquid chamber 2021 has a through-hole structure penetrating the central valve block 202, with a smooth inner wall and no dead corners, facilitating the flow of lubricating medium and preventing impurity accumulation.

[0068] In this specific embodiment, a vertically penetrating valve core channel 2022 is provided within the middle valve block 202. The head of the valve core 23, which is provided with a sealing surface 230, is movably disposed within the valve core channel 2022. The valve core channel 2022 is connected to the liquid chamber 2021. A connecting channel 208 is provided between the lower part of the middle valve block 202 or between the middle valve block 202 and the lower valve block 203. The upper end of the connecting channel 208 is connected to the lower end of the valve core channel 2022, and the lower end of the connecting channel 208 is connected to the mixing chamber 213 within the lower valve block 203. A mating sealing surface 215 is formed in the upper inner cavity of the connecting channel 208. The liquid chamber 2021 and the mixing chamber 213 are selectively connected through the gap between the sealing surface 230 and the mating sealing surface 215, via the valve core channel 2022 and the connecting channel 208. Specifically, when the valve core 23 is closed, the sealing surface 230 and the mating sealing surface 215 are tightly fitted together, and the gap is zero, cutting off the passage between the liquid chamber 2021 and the mixing chamber 213; when the valve core 23 is opened, a gap is formed between the sealing surface 230 and the mating sealing surface 215, and the lubricating medium in the liquid chamber 2021 flows sequentially through the valve core channel 2022 and the connecting channel 208, and enters the mixing chamber 213.

[0069] In this specific embodiment, a mixing chamber 213 is provided inside the lower valve block 203, a gas inlet 212 is provided on one side of the mixing chamber 213, and an atomizing nozzle 22 is provided at the bottom of the mixing chamber 213. The gas inlet 212 is connected to the mixing chamber 213 and is used to introduce compressed air to break the lubricating medium in the mixing chamber 213 into a mist; the atomizing nozzle 22 is connected to the mixing chamber 213 and is used to spray out the atomized lubricating medium.

[0070] In this specific embodiment, an installation cavity (not shown in the figure) is provided between the middle valve block 202 and the upper valve block 201. A sealing shaft 209 is provided in the installation cavity. A corresponding part of the valve core 23 passes through the sealing shaft 209. A first sealing element 2091 (O-ring) is provided between the outer wall of the sealing shaft 209 and the inner wall of the installation cavity. A second sealing element 2092 (Y-ring) is provided between the inner wall of the sealing shaft 209 and the valve core 23. A leakage observation port 2025 is provided on the middle valve block 202 at the position corresponding to the sealing shaft 209 to monitor the sealing status of the sealing element.

[0071] In this specific embodiment, the piston 231 and the valve core 23 are integrally formed, thereby reducing the number of parts, lowering the assembly difficulty, and improving the reliability of the transmission. A sealing ring 2100 is provided between the outer wall of the piston 231 and the inner wall of the valve body 21 to ensure that the air chamber 2011 and the liquid chamber are independent of each other and do not interfere with each other.

[0072] In this specific embodiment, the sealing surface 230 is a conical surface, and the outer diameter of the conical surface gradually decreases along the direction close to the mating sealing surface 215; the mating sealing surface 215 is a conical surface that mates with the conical surface.

[0073] In this specific embodiment, the atomizing nozzle 22 has multiple spray holes 221, which are evenly distributed along the circumference. The design of multiple spray holes 221 evenly distributed along the circumference ensures that the sprayed atomized lubricating medium is diffusely distributed, covering a wide area and forming a uniform lubricating film on the mold surface. This avoids blind spots that may occur with single-hole spraying. Furthermore, the simultaneous spraying from multiple spray holes 221 makes the droplet distribution more uniform, preventing localized over-lubrication or under-lubrication caused by concentrated lubricating medium spraying.

[0074] In this specific embodiment, the orifice diameter of the nozzle 221 is 0.2-0.5 mm. Controlling the orifice diameter of the nozzle 221 within the above range can generate sufficiently fine droplets, ensuring that the lubricating medium spreads rapidly on the mold surface to form a continuous and uniform lubricating film; at the same time, it avoids processing difficulties or clogging risks caused by excessively small orifice diameters.

[0075] In this specific embodiment, the spray valve unit 2 is mounted on the mounting shaft 1 via a mounting base 3;

[0076] Mounting base 3 has a through mounting hole 30, and mounting shaft 1 passes through the mounting hole 30;

[0077] The mounting base 3 is also provided with an opening 31 that communicates with the mounting hole 30. The opening 31 divides the corresponding part of the mounting base 3 into a first mounting part 301 and a second mounting part 302.

[0078] The first mounting part 301 and the second mounting part 302 are adjustablely connected by fasteners. By adjusting the fasteners (not shown in the figure), the clamping force between the mounting hole 30 and the mounting shaft 1 can be changed, thereby realizing the axial sliding and rotation angle locking and releasing of the spray valve unit 2 on the mounting shaft 1. The above structural design allows each spray valve unit 2 to independently adjust its axial position and spray angle, accurately aligning it with its corresponding rolling pass; and the clamp-type structural design is easy to operate and provides reliable clamping.

[0079] In this specific embodiment, the fastener is a bolt or screw. The structure is simple, low-cost, and easy to assemble and disassemble.

[0080] In this specific embodiment, it also includes a mounting beam 5, on which two mounting blocks 6 are spaced apart, and the two ends of the mounting shaft 1 are respectively mounted on the two mounting blocks 6.

[0081] The mounting block 6 is provided with a rotating shaft mounting hole 60 that mates with the mounting shaft 1, and the mounting shaft 1 passes through the rotating shaft mounting hole 60.

[0082] The mounting block 6 is also provided with a shaft opening 61 that communicates with the shaft mounting hole 60. The shaft opening 61 divides the corresponding part on the mounting block 6 into a first clamping part 601 and a second clamping part 602.

[0083] The first clamping part 601 and the second clamping part 602 are adjustablely connected by a first fastener. By adjusting the first fastener (not shown in the figure), the clamping force between the rotating shaft mounting hole 60 and the mounting shaft 1 can be changed, thereby locking and releasing the rotation angle of the mounting shaft 1 on the mounting block 6, which in turn drives all the spray valve units 2 on the mounting shaft 1 to rotate synchronously. The overall alignment is completed in one operation, with high adjustment efficiency.

[0084] In this specific embodiment, the first fastener is a bolt or screw. It has a simple structure, low cost, and is easy to assemble and disassemble.

[0085] In this specific embodiment, a mounting rod 8 is provided on the mounting beam 5, and the central axis of the mounting rod 8 is perpendicular to the central axis of the mounting shaft 1; two mounting blocks 6 are slidably mounted on the mounting rod 8 along its axial direction. The sliding of the mounting blocks 6 along the mounting rod 8 drives all the spray valve units 2 to move synchronously to accommodate molds of different widths.

[0086] In this specific embodiment, the mounting block 6 is provided with a through mounting cavity 600 that cooperates with the mounting rod 8, and the mounting rod 8 passes through the mounting cavity 600. The mounting block 6 is also provided with a notch 6001 communicating with the mounting cavity 600, and the notch 6001 divides the corresponding part of the mounting block 6 into a third clamping part 603 and a fourth clamping part 604. The third clamping part 603 and the fourth clamping part 604 are adjustablely connected by a second fastener (not shown in the figure). By adjusting the second fastener, the clamping force between the mounting cavity 600 and the mounting rod 8 can be changed, realizing the locking and releasing of the axial sliding of the two mounting blocks 6 on the mounting rod 8. The above-mentioned clamping sliding structure can be moved horizontally by loosening and locked by tightening, which is simple to operate and reliable in positioning.

[0087] In this specific embodiment, the second fastener is a bolt or screw. It has a simple structure, low cost, and is easy to assemble and disassemble.

[0088] In this specific embodiment, both ends of the mounting shaft 1 extend beyond the two mounting blocks 6 respectively. A limit ring 10 is detachably provided on the extended end of the mounting shaft 1. The limit ring 10 is used to restrict the axial movement of the mounting shaft 1 relative to the mounting blocks 6. The limit ring 10 is formed by two halves joined together, and the two halves are detachably connected. The limit ring 10 is used to prevent the axial movement of the mounting shaft 1 and ensure the stability of the adjustment position. The split structure allows for convenient installation and disassembly without disassembling the mounting shaft 1.

[0089] The control logic of this device during operation is as follows:

[0090] Each spray valve unit 2 has a pneumatic control port 214 connected to a solenoid valve via an independent pneumatic control pipeline, and its gas inlet 212 connected to an atomizing gas source. The control terminals of the solenoid valve and the atomizing gas source are both electrically connected to the PLC of the roll forging machine.

[0091] When the corresponding rolling pass begins, the PLC first opens the gas inlet 212 of the spray valve unit 2 to supply compressed air; after the gas supply is stable (or simultaneously), the PLC opens the solenoid valve at the air control port 214, and the compressed air pushes the piston 231 to open the valve core 23, and the lubricating medium enters the mixing chamber 213. The continuously input compressed air is immediately atomized and sprayed out from the atomizing nozzle 22.

[0092] When the rolling pass ends, the PLC first closes the solenoid valve at the air control port 214. The valve core 23 immediately resets under the action of the elastic reset member 24, cutting off the lubrication medium. After a preset time delay (e.g., 0.5-1 seconds), the PLC then shuts off the supply of compressed air to the gas inlet 212.

[0093] By controlling the timing as described above, it is ensured that the atomized gas arrives before the lubricating medium and stops after the lubricating medium, thereby preventing the lubricating medium from being sprayed out directly without atomization or dripping after stopping.

Claims

1. A lubricating medium spraying device for rolls of a roll forging mill, characterized in that, include: The mounting shaft and multiple spray valve units are mounted on the mounting shaft. The spray valve units can slide along the axial direction of the mounting shaft and are rotatably mounted on the mounting shaft. The number of spray valve units matches the number of rolling passes on the roll die of the roll forging mill. One spray valve unit corresponds to one rolling pass. The spray valve unit includes: The valve body is equipped with a liquid inlet channel, a gas inlet, a mixing chamber, an atomizing nozzle, and a gas control port. The valve core is movably disposed within the valve body, and a sealing surface is provided at the head of the valve core. The elastic reset element is used to apply a force to the valve core to make the sealing surface press tightly against the mating sealing surface provided on the valve body to cut off the connection between the liquid inlet channel and the mixing chamber, forming a normally closed structure; The piston, mounted on the valve core, is installed in the valve body and moves synchronously with the valve core. Compressed air introduced through the pneumatic control port acts on the piston, pushing the valve core to move against the force of the elastic reset element, causing the sealing surface to disengage from the mating sealing surface, thus realizing the connection between the liquid inlet channel and the mixing chamber. The flow regulating mechanism is used to adjust the opening gap between the sealing surface of the valve core head and the mating sealing surface to control the flow rate of the lubricating medium flowing into the mixing chamber. The gas inlet is connected to the mixing chamber and is used to introduce compressed air to break the lubricating medium in the mixing chamber into a mist. The atomizing nozzle is connected to the mixing chamber and is used to spray out a mist of lubricating medium.

2. The lubricating medium spraying device for a roll forging mill as described in claim 1, characterized in that... The valve body is provided with a liquid chamber, and the liquid inlet channel is connected to one end of the liquid chamber. The valve body is also provided with a liquid outlet channel, which is connected to the other end of the liquid chamber. The liquid chamber and the mixing chamber can be selectively connected through the gap between the sealing surface and the mating sealing surface. The liquid outlet channel on one of the spray valve units is used to connect in series with the liquid inlet channel of the adjacent spray valve unit, so that the lubricating medium flows through multiple spray valve units connected in series in sequence.

3. The lubricating medium spraying device for a roll forging mill as described in claim 1, characterized in that... The atomizing nozzle has multiple nozzles, which are evenly distributed along the circumferential direction.

4. The lubricating medium spraying device for a roll forging mill as described in claim 1, characterized in that... The flow regulating mechanism includes an adjusting screw, which is rotatably mounted on the valve body. One end of the adjusting screw extends into the valve body and is opposite to or in contact with the end of the valve core away from its sealing surface. The other end of the adjusting screw extends out of the valve body. The opening gap between the sealing surface and the mating sealing surface can be adjusted by rotating the adjusting screw.

5. The lubricating medium spraying device for a roll forging mill as described in claim 1, characterized in that... The sealing surface is a conical surface, and the outer diameter of the conical surface gradually decreases along the direction close to the mating sealing surface; the mating sealing surface is a conical surface that mates with the conical surface.

6. The lubricating medium spraying device for a roll forging mill as described in claim 1, characterized in that: The spray valve unit is mounted on the mounting shaft via a mounting base; The mounting base has a through mounting hole, and the mounting shaft passes through the mounting hole; The mounting base is also provided with an opening that communicates with the mounting hole, and the opening divides the corresponding part of the mounting base into a first mounting part and a second mounting part. The first mounting part and the second mounting part are adjustablely connected by fasteners. By adjusting the fasteners, the clamping force between the mounting hole and the mounting shaft can be changed, thereby realizing the locking and releasing of the axial sliding and rotation angle of the spray valve unit on the mounting shaft.

7. The lubricating medium spraying device for a roll forging mill as described in claim 1, characterized in that: It also includes a mounting beam, on which two mounting blocks are spaced apart, and the two ends of the mounting shaft are respectively mounted on the two mounting blocks; The mounting block is provided with a rotating shaft mounting hole that mates with the mounting shaft, and the mounting shaft passes through the rotating shaft mounting hole. The mounting block is also provided with a shaft opening that communicates with the shaft mounting hole. The shaft opening divides the corresponding part of the mounting block into a first clamping part and a second clamping part. The first clamping part and the second clamping part are adjustablely connected by a first fastener. By adjusting the first fastener, the clamping force between the rotating shaft mounting hole and the mounting shaft can be changed, thereby locking and releasing the rotation angle of the mounting shaft on the mounting block, which in turn drives all the spray valve units on the mounting shaft to rotate synchronously.

8. The lubricating medium spraying device for a roll forging mill as described in claim 7, characterized in that... The mounting beam is provided with a mounting rod, the central axis of which is perpendicular to the central axis of the mounting shaft; the two mounting blocks are slidably mounted on the mounting rod along its axial direction.

9. A lubricating medium spraying device for a roll forging mill as described in claim 8, characterized in that... The mounting block is provided with a through mounting cavity that mates with the mounting rod, and the mounting rod passes through the mounting cavity. The mounting block is also provided with a notch that communicates with the mounting cavity, and the notch divides the corresponding part of the mounting block into a third clamping part and a fourth clamping part. The third clamping part and the fourth clamping part are adjustablely connected by a second fastener. By adjusting the second fastener, the clamping force between the mounting cavity and the mounting rod can be changed, thereby locking and releasing the axial sliding of the two mounting blocks on the mounting rod.

10. A lubricating medium spraying device for a roll forging mill as described in claim 7, characterized in that... The two ends of the mounting shaft extend out of the two mounting blocks respectively. A limit ring is detachably provided on the extended end of the mounting shaft. The limit ring is used to restrict the axial movement of the mounting shaft relative to the mounting block. The limit ring is formed by two halves joined together and the two halves are detachably connected.

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