Quenching cooling assistive device and treatment method for integrated barrel forge piece with connecting pipe

Abstract

The invention discloses a quenching and cooling auxiliary tool for an integrated barrel forge piece with a connecting pipe and a treatment method. The quenching and cooling auxiliary tool comprises a flow guiding device and a directional water spraying device. The directional water spraying device can spray water flow to the hollow part of the forge piece in the vertical direction and in the direction between the horizontal direction and the vertical direction at the same time; the flow guiding device is arranged in the barrel forge piece and can guide water flows sprayed by the directional water spraying device in different directions to be evenly dispersed on the inner wall of the barrel forge piece. By arranging the directional water spraying device capable of spraying water flow in the vertical direction and in the direction between the horizontal direction and the vertical direction at the same time, the defects that in the prior art, cooling water is rapidly brought to the upper space of the forge piece, and cooling of the upper portion and the lower portion of the forge piece is uneven are overcome; the water outlets of the odd number of water flow channels are narrower than the water inlets, and the odd number of water flow channels directly face the forge piece connecting pipe, so that the defect that the cooling effect of the connecting pipe is poor when the forge piece connecting pipe is thick in wall and small in inner diameter in the prior art is overcome.

Description

Technical Field

[0001] The invention relates to the technical field of heat treatment of metal workpieces, and in particular to a quenching cooling auxiliary tool and a treatment method for a cylindrical forging with an integrated pipe. Background Art

[0002] Heat treatment of metal materials is a process of heating metal or alloy workpieces to a suitable temperature, keeping them at this temperature for a certain period of time, and then cooling them at different speeds in different media to control their performance by changing the microstructure of the surface or inside of the metal material. General alloy steel needs to be heated to above the subcritical temperature, kept at this temperature for a certain period of time, and then cooled at a cooling rate greater than the critical cooling rate to obtain an unbalanced structure dominated by martensite (it is also possible to obtain bainite or maintain single-term austenite according to the performance of the workpiece). Usually water and oil are the most common cooling media.

[0003] The integrated cylinder with a pipe has a special structure of the pipe part and its cooling rate is uneven during quenching, which affects the uneven final performance. Since the workpiece is subjected to a complex stress process during the heat treatment process, the workpiece is deformed under the combined action of multiple stress fields such as thermal stress, phase change stress and structural stress. For the integrated cylinder with a pipe, due to its shape and structural characteristics, it is easy to produce uneven quenching cooling rates in various places, generating thermal stress and causing the performance of the forging (such as Brinell hardness) to decrease. At the same time, because the integrated cylinder with a pipe has a special pipe structure, especially when the pipe is thick-walled and has a small inner diameter, the cooling water flow at the pipe is small and the cooling effect is poor. In addition, the existing water injection cooling scheme for the inner cavity of the forging can often quickly bring the cooling water to the upper space of the forging, and cannot take into account the cooling needs of the lower part of the forging, resulting in uneven cooling of the upper and lower parts of the forging. Summary of the invention

[0004] In view of the above analysis and in response to the deficiencies in the prior art, the present invention aims to provide a quenching cooling aid and a processing method for an integrated cylinder forging with a connecting pipe, so as to solve at least one of the problems existing in the previous integrated cylinder forgings with a connecting pipe, such as uneven cooling of the upper and lower parts of the forgings, poor cooling effect at the connecting pipe, and decreased performance of the forgings.

[0005] The purpose of the present invention is mainly achieved through the following technical solutions:

[0006] The present invention discloses a quenching and cooling auxiliary tool for a cylindrical forging with an integrated pipe connection, comprising:

[0007] diversion devices and directional water spraying devices;

[0008] The directional water spray device can spray water toward the hollow part of the forging in the vertical direction and in the direction between the horizontal and vertical directions at the same time;

[0009] The flow guide device is placed inside the cylinder forging, and can guide the water flows in different directions sprayed by the directional water spray device to be evenly dispersed on the inner wall of the cylinder forging.

[0010] Preferably, the flow guide device comprises a truncated cone structure, the outer wall of the truncated cone structure is provided with a plurality of water flow channels extending from the top to the bottom of the truncated cone structure, and the water flow of the directional water spray device can pass through the hollow area of ​​the truncated cone structure and the water flow channels at the same time;

[0011] The truncated cone structure is suspended and inverted inside the forging;

[0012] The water flow channel is provided with a water flow channel water inlet at the top of the truncated cone structure, a first water outlet at the bottom of the truncated cone structure, and a second water outlet between the water flow channel water inlet and the first water outlet; the water flow in the water flow channel can freely flow in and out of the second water outlet according to the change of water pressure;

[0013] The water flow channels are defined as the first water flow channel, ..., the Nth water flow channel in order according to the circumferential direction of the truncated cone structure.

[0014] When N is an odd number, the width of the outlet of the Nth water flow channel is smaller than the width of the inlet of the Nth water flow channel;

[0015] When N is an even number, the width of the water outlet of the Nth water flow channel is greater than the width of the water inlet of the Nth water flow channel.

[0016] Preferably, the flow guide device comprises a flow guide cover; the flow guide cover is a truncated cone structure, suspended and inverted inside the forging;

[0017] The horizontal cross-sectional area of ​​the deflector gradually increases from the side close to the directional water spray device to the side far from the directional water spray device.

[0018] Preferably, the angle γ between the truncated cone side surface and the truncated cone bottom surface of the air deflector is 45°±15°, and the ratio of the truncated cone structure bottom surface diameter D0 to the forging inner diameter D1 satisfies: 0.8-0.9.

[0019] Preferably, the flow guide device further comprises a flow guide plate; a plurality of the flow guide plates are provided, which are dispersedly arranged on the outer wall of the flow guide cover, and the side surface of the flow guide plate is fixedly connected to the outer wall of the flow guide cover;

[0020] A group of top surfaces or bottom surfaces opposite to each other of any guide plate are arranged facing the top surfaces or bottom surfaces of two adjacent guide plates, and the two adjacent guide plates form a water flow channel;

[0021] The water flow channels are defined as the first water flow channel, ..., the Nth water flow channel in sequence according to the circumferential direction of the truncated cone structure. The water outlet width of the odd-numbered sequence water flow channels is smaller than the water inlet width of the odd-numbered sequence water flow channels; the water outlet width of the even-numbered sequence water flow channels is larger than the water inlet width of the even-numbered sequence water flow channels.

[0022] Preferably, when N is an odd number, the width of the water outlet of the Nth water flow channel is smaller than the width of the adjacent water outlet;

[0023] When N is an even number, the width of the water outlet of the Nth water flow channel is greater than the width of the adjacent water outlets.

[0024] Preferably, the water outlet widths of the water flow channels in the odd-numbered sequence are the same; and the water outlet widths of the water flow channels in the even-numbered sequence are the same.

[0025] Preferably, the inclination angle θ of adjacent guide plates is adjusted according to the pipe wall thickness δ1 to satisfy:

[0026] When δ1≥150mm, 15°<θ<45°;

[0027] When 150>δ1≥30mm, 45°≤θ<90°.

[0028] Preferably, the length l0 of the guide plate is adjusted according to the inclination angle θ of the adjacent guide plates of the connecting pipe, satisfying: 0.6h≤arccos(θ / 2)l0≤h, where h is the truncated cone height of the guide cover.

[0029] A processing method for an integrated barrel forging with a connecting pipe uses the above-mentioned quenching and cooling auxiliary tool for the integrated barrel forging with a connecting pipe.

[0030] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0031] (1) The present invention overcomes the defect in the prior art that cooling water is quickly brought to the upper space of the forging, but the cooling demand of the lower part of the forging is not taken into account, resulting in uneven cooling of the upper and lower parts of the forging, by providing a directional water spraying device that can spray water in the vertical direction and in the direction between the horizontal and vertical directions at the same time;

[0032] (2) The present invention sets the outlet width of the odd-numbered water flow channel to be smaller than the inlet width, and places the odd-numbered water flow channel directly opposite to the forging pipe, so that the water pressure in the water flow channel is greater than the water pressure in the internal cavity of the forging, and the water in the water flow channel flows out through the second water outlet, forming a vertical outlet water flow spray direction diffusion, thereby increasing the water flow rate of the pipe introduced into the forging, and overcoming the defects of the prior art that when the forging pipe is thick-walled and has a small inner diameter, the cooling water flow rate at the pipe is small and the cooling effect is poor;

[0033] (3) The present invention arranges the horizontal cross-sectional area of ​​the air guide hood to gradually increase from the side of the near directional water spray device to the side of the far directional water spray device, thereby achieving the water flow passing through the outer wall of the air guide hood to diffuse from the air guide hood to the inner wall of the cylinder forging, thereby improving the quenching and cooling uniformity of the forging and the forging performance, reducing the flow velocity of the water flow in the outlet water flow injection direction, and increasing the residence time of the water flow inside the forging and the quenching and cooling effect, thereby overcoming the defects of the prior art that the integrated cylinder with a pipe is prone to uneven quenching and cooling speed in various places, generating thermal stress and causing a decrease in forging performance (such as Brinell hardness), and rapidly bringing cooling water to the upper space of the forging, and failing to take into account the cooling demand of the lower part of the forging, resulting in uneven cooling of the upper and lower parts of the forging.

[0034] Other features and advantages of the present invention will be described in the following description, and some advantages may become apparent from the description, or may be understood by practicing the present invention. The purpose and other advantages of the present invention may be realized and obtained through the contents particularly pointed out in the embodiments of the description and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The drawings are only for the purpose of illustrating particular embodiments and are not to be considered limiting of the present invention. Like reference symbols denote like components throughout the drawings.

[0036] Figure 1 It is a schematic diagram of a cylindrical forging with a pipe integrated therewith according to the present invention;

[0037] Figure 2 It is a schematic diagram of the connection relationship of the quenching and cooling auxiliary tool of the present invention when quenching and cooling a forging;

[0038] Figure 3 This is a three-dimensional view of the diversion device;

[0039] Figure 4 This is the front view of the diversion device;

[0040] Figure 5 A three-dimensional view of the directional water spray device

[0041] Figure 6 This is the front view of the directional water spray device;

[0042] Figure 7 It is a top view of the directional water spray device;

[0043] Figure 8 This is a simulation diagram of the internal water flow distribution in Example 1;

[0044] Fig. 9 This is a simulation diagram of the internal water flow distribution of Comparative Example 1;

[0045] Fig.10 This is a simulation diagram of the internal water flow distribution of Comparative Example 2;

[0046] Fig.11 This is a simulation diagram of the internal water flow distribution of Comparative Example 4;

[0047] Fig.12 This is a simulation diagram of the internal water flow distribution of comparative example 5.

[0048] Reference numerals:

[0049] Cylindrical body 001, first connecting pipe 002, second connecting pipe 003, third connecting pipe 004, fourth connecting pipe 005;

[0050] A flow guide device 01, a flow guide cover 011, a flow guide plate 012, a support 013, a water flow channel 014, and a water outlet 0141 of the water flow channel;

[0051] Directional water spraying device 02, main water outlet pipe 021, guide water outlet pipe 022. DETAILED DESCRIPTION

[0052] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0053] Regarding the integrated barrel forgings with pipe connection, such as Figure 1 As shown, it comprises: a cylindrical body 001 with two ends connected and an inner hollow, and a first connecting pipe 002 and a second connecting pipe 003 arranged oppositely, and a third connecting pipe 004 and a fourth connecting pipe 005 arranged oppositely;

[0054] The first connecting pipe 002 , the second connecting pipe 003 , the third connecting pipe 004 , and the fourth connecting pipe 005 are all connected to the inner cavity of the cylindrical body 001 .

[0055] On the one hand, the present invention discloses a quenching cooling auxiliary tool for a cylindrical forging with an integrated pipe connection, such as Figure 2-Figure 7 As shown, including:

[0056] The diversion device 01 and the directional water spraying device 02;

[0057] The directional water spray device 02 can spray water toward the hollow part of the forging in the vertical direction and in the direction between the horizontal and vertical directions at the same time;

[0058] The flow guide device 01 is placed inside the cylinder forging, and can guide the water flows in different directions sprayed by the directional water spray device 02 to be evenly dispersed on the inner wall of the cylinder forging.

[0059] Compared with the prior art, the present invention overcomes the defect of the prior art that cooling water is quickly brought to the upper space of the forging, but the cooling demand of the lower part of the forging cannot be taken into account, resulting in uneven cooling of the upper and lower parts of the forging, by providing a directional water spray device that can spray water in the vertical direction and in a direction between the horizontal and vertical directions at the same time.

[0060] Specifically, the flow guide device 01 includes a truncated cone structure, and the outer wall of the truncated cone structure is provided with a plurality of water flow channels extending from the top to the bottom of the truncated cone structure, and the water flow of the directional water spray device 02 can pass through the water flow channels;

[0061] The water flow channel is provided with a water flow channel water inlet at the top of the truncated cone structure, a first water outlet is provided at the bottom of the truncated cone structure, and a second water outlet is provided between the water flow channel water inlet and the first water outlet; the water flow in the water flow channel can freely flow in and out of the second water outlet according to the change of water pressure;

[0062] The water flow channels are arranged in order according to the circumferential direction of the truncated cone structure and are defined as the first water flow channel, ..., the Nth water flow channel,

[0063] When N is an odd number, the width of the outlet of the Nth water flow channel is smaller than the width of the inlet of the Nth water flow channel;

[0064] When N is an even number, the width of the water outlet of the Nth water flow channel is greater than the width of the water inlet of the Nth water flow channel.

[0065] During implementation, the water flow of the directional water spray device 02 can enter through the water inlet of the water flow channel and flow out from the first water outlet;

[0066] The special thing is that the odd-numbered water flow channels have a smaller outlet width than the inlet width, and the water pressure in the water flow channel is greater than the water pressure in the internal cavity of the forging. The water in the water flow channel flows out through the second outlet, thereby forming a vertical outlet water flow diffusion direction. When the odd-numbered water flow channels are facing the forging connecting pipe, it helps to increase the water flow rate of the connecting pipe introduced into the forging, improve the uniformity of the cooling water flow in the forging cavity, and improve the quenching cooling uniformity and forging performance of the forging.

[0067] Compared with the prior art, the present invention sets the outlet width of the odd-numbered water flow channels to be smaller than the inlet width, and places the odd-numbered water flow channels directly opposite the forging connecting pipes, so that the water pressure in the water flow channels is greater than the water pressure in the internal cavity of the forging. The water in the water flow channels flows out through the second water outlet, forming a diffusion direction of the vertical outlet water flow jet, thereby increasing the water flow rate of the connecting pipe introduced into the forging, overcoming the defects of the prior art that when the forging connecting pipes have thick walls and a small inner diameter, the cooling water flow rate at the connecting pipes is small and the cooling effect is poor.

[0068] Specifically, Figure 2 , Figure 3As shown, the flow guide device 01 includes a flow guide cover 011; the flow guide cover 011 is a truncated cone structure, suspended and inverted inside the forging;

[0069] The horizontal cross-sectional area of ​​the guide cover 011 gradually increases from the side of the near directional water spray device to the side of the far directional water spray device, thereby achieving that the water flow passing through the outer wall of the guide cover 011 can be diffused from the guide cover 011 to the inner wall of the cylinder forging.

[0070] It should be noted that the diffusion of water flow from the guide cover 011 to the inner wall of the cylinder forging helps to increase the flow rate of water introduced into the forging, improve the uniformity of the cooling water flow in the forging cavity, and improve the uniformity of quenching cooling and the performance of the forging; at the same time, the diffusion of water flow from the guide cover 011 to the inner wall of the cylinder forging also helps to reduce the water flow velocity, increase the residence time of the water flow inside the forging, and improve the quenching cooling effect.

[0071] Compared with the prior art, the present invention arranges a guide hood that gradually increases in size from the side of the near directional water spray device to the side of the far directional water spray device, thereby achieving that the water flow passing through the outer wall of the guide hood can diffuse from the guide hood to the inner wall of the cylinder forging, thereby improving the quenching and cooling uniformity of the forging and the forging performance, reducing the water flow velocity, and increasing the water flow residence time inside the forging and the quenching and cooling effect, overcoming the defects of the prior art that the integrated cylinder with a pipe is prone to uneven quenching and cooling speed in various places, generating thermal stress, resulting in a decrease in forging performance (such as Brinell hardness), and quickly bringing cooling water to the upper space of the forging, and failing to take into account the cooling needs of the lower part of the forging, resulting in uneven cooling of the forging from top to bottom.

[0072] Specifically, the angle γ between the side surface of the cone of the air guide cover 011 and the bottom surface of the cone is 45°±15°, and the ratio of the bottom diameter D0 of the cone structure to the inner diameter D1 of the forging satisfies: 0.8~0.9, that is, the air guide cover 011 is not in direct contact with the inner wall of the forging, and space is reserved between the two for cooling water to rise along the outer wall of the air guide cover 011 and diffuse vertically from the outer wall of the air guide cover 011 to the inner wall of the forging and even to the connecting pipe.

[0073] It should be noted that if the angle between the side surface of the cone and the bottom surface of the cone is too small, or the ratio of the bottom surface diameter of the cone structure to the inner diameter of the forging is too large, the water flow will be blocked in the lower area and enter the connecting pipe in large quantities and be discharged through the connecting pipe, which will lead to insufficient cooling of the upper part of the forging and uneven cooling of the forging, affecting the performance; and if the angle between the side surface of the cone and the bottom surface of the cone is too large, or the ratio of the bottom surface diameter of the cone structure to the inner diameter of the forging is too small, most of the water flow will be discharged through the gap between the guide cover 011 and the forging, and too little cooling water will enter the connecting pipe laterally, which will lead to insufficient cooling of the connecting pipe and uneven cooling of the forging, affecting the performance.

[0074] Specifically, the flow guide device 01 further includes a flow guide plate 012; a plurality of flow guide plates 012 are provided, which are dispersedly arranged on the outer wall of the flow guide cover 011, and the side surface of the flow guide plate 012 is fixedly connected to the outer wall of the flow guide cover 011;

[0075] A group of top surfaces or bottom surfaces of any guide plate 012 are arranged opposite to the top surfaces or bottom surfaces of two adjacent guide plates 012, and the two adjacent guide plates 012 form a water flow channel 014;

[0076] The water flow channels are defined as the first water flow channel, ..., the Nth water flow channel in sequence according to the circumferential direction of the truncated cone structure. The water outlet width of the odd-numbered sequence water flow channels is smaller than the water inlet width of the odd-numbered sequence water flow channels; the water outlet width of the even-numbered sequence water flow channels is larger than the water inlet width of the even-numbered sequence water flow channels.

[0077] It can be understood that the outlet width of the odd-numbered sequence water flow channel is smaller than the inlet width of the odd-numbered sequence water flow channel, which helps to form a diffusion in the vertical outlet water flow injection direction when the water flow ejected at the outlet is diffused, helps to increase the flow rate of the connecting pipe introduced into the forging, improves the uniformity of the cooling water flow in the forging cavity, improves the uniformity of quenching and cooling of the forging, and improves the performance of the forging; at the same time, the diffusion in the vertical outlet water flow injection direction also helps to reduce the flow velocity of the water flow in the vertical injection direction of the outlet water flow, so that the water flow passing through the water flow channel partially flows vertically to the guide cover 011, thereby increasing the residence time of the water flow inside the forging and improving the quenching and cooling effect.

[0078] Preferably, when N is an odd number, the width of the water outlet of the Nth water flow channel is smaller than the width of the adjacent water outlet;

[0079] When N is an even number, the width of the water outlet of the Nth water flow channel is greater than the width of the adjacent water outlets.

[0080] During implementation, the water output from the water outlet of the odd-numbered sequence water flow channel is lower than that of the adjacent even-numbered sequence water flow channel, thereby forming a water pressure difference at the water outlets of adjacent water flow channels, which helps to form water flow between different water outlets, thereby reducing the difference in cooling water volume in different areas, further improving the uniformity of water flow, and improving the performance of forgings.

[0081] Preferably, the water outlet widths of each odd-numbered sequence of water flow channels are the same; and the water outlet widths of each even-numbered sequence of water flow channels are the same.

[0082] It is understandable that if Figure 4 As shown, the outlet widths of each odd-numbered sequence water flow channel are the same, the outlet widths of each even-numbered sequence water flow channel are the same, and the outlet widths of the odd-numbered sequence water flow channels are smaller than those of the adjacent even-numbered sequence water flow channels. Then, the plane where the top or bottom of the guide plate 012 is located is not parallel to the plane where the top or bottom of the adjacent guide plate 012 is located, and there is an inclination angle θ.

[0083] Preferably, the inclination angle θ of adjacent guide plates is adjusted according to the pipe wall thickness δ1 to satisfy:

[0084] When δ1≥150mm, 15°<θ<45°;

[0085] When 150>δ1≥30mm, 45°≤θ<90°.

[0086] It can be understood that the greater the wall thickness δ1 of the forging pipe, the greater the demand for cooling water; and the increase in θ helps to increase the amount of water flowing vertically through the guide cover 011 in the water flow through the water flow channel through the guide plate 012, reduce the amount of water sprayed vertically at the outlet of the water flow channel, and thus increase the amount of cooling water entering the pipe in the forging, thereby improving the cooling effect of the pipe in the forging.

[0087] Preferably, the length l0 of the guide plate is adjusted according to the inclination angle θ of the adjacent guide plates of the connecting pipe, satisfying: 0.6h≤arccos(θ / 2)l0≤h, where h is the truncated cone height of the guide cover 011.

[0088] Preferably, if Figure 2 As shown, the guide device 01 further includes a support 013; two supports 013 are provided, which are vertically cross-arranged.

[0089] During implementation, both ends of one support 013 penetrate the conical side of the air deflector 011 from the length direction of the support 013 and penetrate into a group of relative connecting pipes of the forging; another support 013 is arranged perpendicular to the first support 013 and penetrates the conical side of the air deflector 011 and penetrates into another group of relative connecting pipes of the forging, thereby realizing stable support of the air deflector device 01 inside the forging.

[0090] Preferably, support 013 passes through the odd-numbered sequence water flow channel so that the forged pipe is directly opposite the odd-numbered sequence water flow channel. The odd-numbered sequence water flow channel has a larger amount of water perpendicular to the direction of the guide cover 011, and can provide a better cooling effect for the forged pipe than the even-numbered sequence water flow channel.

[0091] Preferably, the directional water spray device 02 includes a main water outlet pipe 021 and a guide water outlet pipe 022 ; the main water outlet pipe 021 may be a cylindrical hollow pipe, and a plurality of guide water outlet pipes 022 are provided and are circumferentially arranged along the side wall of the main water outlet pipe 021 .

[0092] During implementation, the water outlet direction of the main water outlet pipe 021 is directly facing the top of the frustum structure of the guide cover 011, supplying water to the water flow channel on the outer wall of the guide cover 011; the guide water outlet pipe 022 ejects water, a part of which can enter the water flow channel between the guide plates 012, and under the action of the odd-numbered sequence water flow channels, provide more sufficient cooling water supply for the bottom inner wall of the forging and the connecting pipe; the other part is used as cooling water supply for the inner wall of the lower half of the forging.

[0093] Preferably, the included angle α between the projection of the guide water outlet pipe 022 on the horizontal plane and the projection of the outer wall of the main water outlet pipe 021 on the horizontal plane satisfies: 20°<α<45°.

[0094] The included angle β between the central axis of the guide outlet pipe 022 and the main outlet pipe 021 satisfies:

[0095] arctan(D1 / 2(H1+H2))<β<arctan(D1 / 2H1);

[0096] Wherein, D1 is the inner diameter of the forging, H1 is the height of the connecting pipe relative to the bottom surface of the forging, that is, the distance between the lower edge of the connecting pipe and the bottom surface of the forging, and H2 is the outer diameter of the connecting pipe.

[0097] It should be noted that, within the above reasonable range, β can provide power for cooling water to flow from bottom to top between the outer wall of the fairing and the inner wall of the forging, and promote water to enter from the water inlet of the water channel on the outer wall of the fairing.

[0098] If β is too large, it will help to obtain a larger vortex, which will result in: on the one hand, a large amount of energy is used to overcome the stroke resistance, increasing energy consumption; on the other hand, the amount of water entering the water flow channel on the outer wall of the fairing is reduced, affecting the water intake and cooling effect of the pipe area. If β is too small, the vortex is too small, making it difficult to achieve a good rotation mixing effect.

[0099] It should be noted that, when α is within the above reasonable range, it can ensure that the water outlet from the guide outlet pipe 022 generates eddy currents in the tangential direction: on the one hand, the cooling water is diffused from the guide outlet pipe 022 to the inner wall of the forging and the connecting pipe; on the other hand, the generation of eddy currents helps to redisperse the cooling water flow in the direction of the main outlet pipe 021, promotes the water flow exchange between the odd-numbered sequence water flow channels and the even-numbered sequence water flow channels, improves the uniformity of cooling water dispersion, and helps to improve the performance of the forgings.

[0100] If α is too small, the eddy current will be larger, and a large amount of energy will be used to overcome the stroke resistance, increasing energy consumption; if α is too large, the eddy current will be too small, making it difficult to achieve a good rotational mixing effect.

[0101] Preferably, the guide water outlet pipes 022 are evenly arranged in the circumferential direction of the main water outlet pipe 021 .

[0102] Preferably, the guide water outlet pipes 022 uniformly arranged in the circumferential direction at the same height form an annular guide water outlet area; there are multiple annular guide water outlet areas, which are uniformly arranged in the vertical direction of the main water outlet pipe 021.

[0103] Preferably, the annular guide water outlet area is provided with 2 to 10 layers in the height direction of the main water outlet pipe 021 .

[0104] Preferably, it is ensured that the guide water outlets do not interfere with each other, and the number of guide water outlets n, the guide water outlet diameter d2 (i.e., the diameter of the guide water outlet pipe 022) and the main water outlet diameter d1 (i.e., the diameter of the main water outlet pipe 021) and the water inlet diameter d0 of the directional water spraying device need to satisfy the following relationship: d0 2 ≥d1 2 +n×d2 2 , thereby ensuring the water pressure and uniformity of the outlet.

[0105] It should be noted that in the quenching cooling device of the present invention, the water pressure at the water outlet not only affects the cooling rate but also affects the cooling uniformity of each area. Insufficient water pressure will make it difficult to achieve the expected cooling uniformity and forging performance in each area. The above settings help to ensure the water pressure and uniformity of the water outlet.

[0106] Preferably, in order to ensure that the directional water spray device 02 matches the size of the forging and the relative positions of the directional water spray device 02 and the guide device 01, Figure 2 As shown, the total height H3 of the main water outlet pipe 021, the height H1 of the connecting pipe relative to the bottom surface of the forging, the distance L1 between the top of the truncated cone of the guide cover and the end surface of the main water outlet pipe outlet, and the distance L2 of the end surface of the main water outlet pipe outlet into the forging meet the following requirements:

[0107] L2>0;

[0108] L1≥tanγ×(D0 / 2)-h;

[0109] L1+L2≤H1;

[0110] 0.3H1≤H3≤2H1;

[0111] Wherein, h is the height of the truncated cone of the air deflector 011, D0 is the bottom diameter of the truncated cone structure of the air deflector 011, and γ is the angle between the truncated cone side surface and the bottom surface of the truncated cone of the air deflector 011.

[0112] It should be noted that the total height H3, L1 and L2 of the main outlet pipe 021 are related to h, D0, γ and H1. If they are too large or too small, they will affect the uniformity of the cooling water flow in the forging, affecting the quenching cooling effect and performance of the forging.

[0113] On the other hand, the present invention discloses a method for quenching and cooling an integrated cylinder forging with a connecting pipe, comprising: using the above-mentioned auxiliary tool for quenching and cooling the integrated cylinder forging with a connecting pipe.

[0114] Specifically, the flow guide device 01 is suspended inside the cylinder forging, so that the odd-numbered sequence water flow channels on the flow guide device 01 are directly opposite to the pipe;

[0115] The directional water spray device 02 is located at the bottom of the cylinder forging, and water flows into the cylinder forging through the bottom of the cylinder forging;

[0116] The directional water spray device 02 can spray water toward the hollow part of the forging in the vertical direction and in the direction between the horizontal and vertical directions at the same time;

[0117] The flow guide device 01 is placed inside the cylinder forging, and can guide the water flows in different directions sprayed by the directional water spray device 02 to be evenly dispersed on the inner wall of the cylinder forging.

[0118] Example 1

[0119] This embodiment discloses a quenching cooling auxiliary tool for a cylindrical forging with an integrated pipe connection. Figure 2-Figure 7 As shown, including:

[0120] The diversion device 01 and the directional water spraying device 02;

[0121] The flow guide device 01 includes a flow guide cover 011; the flow guide cover 011 is a hollow through-conical structure, suspended and inverted inside the forging; the flow guide cover 011 gradually increases from one side of the near directional water spray device 02 to the side of the far directional water spray device 02, thereby achieving that the water flow passing through the outer wall of the flow guide cover 011 can be diffused from the flow guide cover to the inner wall of the cylinder forging.

[0122] The angle γ between the side surface of the cone of the air deflector 011 and the bottom surface of the cone is 30°, and the ratio of the bottom diameter D0 of the cone structure to the inner diameter D1 of the forging satisfies: 0.9:1, D1=4000mm.

[0123] The flow guide device 01 includes flow guide plates 012, which are dispersedly arranged on the outer wall of the flow guide cover 011, and the side surfaces of the flow guide plates 012 are fixedly connected to the outer wall;

[0124] A group of top surfaces or bottom surfaces opposite to any guide plate 012 are arranged facing the top surfaces or bottom surfaces of two adjacent guide plates 012, and the two adjacent guide plates 012 form a water flow channel 014; the width of the water outlet 0141 of any water flow channel is smaller than or larger than the width of the water outlet 0141 of the two adjacent water flow channels of the water flow channel.

[0125] There are 8 guide plates 012 and 8 water flow channels;

[0126] All water flow channels between the guide plates 012 are defined as the first water flow channel, ..., the eighth water flow channel in sequence:

[0127] The outlet widths of the first water flow channel, the third water flow channel, the fifth water flow channel, and the seventh water flow channel are smaller than the outlet widths of the adjacent even-numbered sequence water flow channels;

[0128] The width of the water outlets of the second water flow channel, the fourth water flow channel, the sixth water flow channel, and the eighth water flow channel is greater than the width of the water outlets of the adjacent odd-numbered sequence water flow channels.

[0129] The water outlet widths of the above odd-numbered and even-numbered sequence water flow channels can achieve a water flow rate at any water flow channel outlet that is greater than or less than the water flow rates at the two adjacent water flow channel outlets of the water flow channel.

[0130] The wall thickness of the connecting pipe is δ1=160mm, θ=30°, the height of the cone of the guide cover 011 is h=1000mm, and the length of the guide plate is l0=h / arccos15°.

[0131] The support 013 is provided with two, which are vertically cross-arranged.

[0132] The directional water spray device 02 includes a main water outlet pipe 021 and a guide water outlet pipe 022 ; the main water outlet pipe 021 may be a cylindrical hollow pipe, and a plurality of guide water outlet pipes 022 are provided and are circumferentially arranged along the side wall of the main water outlet pipe 021 .

[0133] The water outlet direction of the main water outlet pipe 021 is directly facing the water inlet of the guide cover 011, supplying water to the guide cover 011 to achieve cooling of the upper part of the forging; the guide water outlet pipe 022 can enter the water flow channel between the guide plates 012, and under the action of the odd-numbered sequence water flow channel, provide more sufficient cooling water supply for the bottom inner wall of the forging and the connecting pipe.

[0134] The included angle α between the projection of the guide water outlet pipe 022 on the horizontal plane and the projection of the outer wall of the main water outlet pipe 021 on the horizontal plane is 30°.

[0135] The included angle β between the central axis of the guide water outlet pipe 022 and the main water outlet pipe 021 is

[0136] arctan(3D1 / 4(H1+H2)), D1=4000mm, H1=1200mm, H2=900mm.

[0137] The guide water outlet pipes 022 are evenly arranged in the circumferential direction of the main water outlet pipe 021; the guide water outlet pipes 022 evenly arranged in the circumferential direction at the same height form an annular guide water outlet area; there are multiple annular guide water outlet areas, which are evenly arranged in the vertical direction of the main water outlet pipe 021; the annular guide water outlet area has 5 layers in the height direction of the main water outlet pipe 021.

[0138] The number of guide water outlets n=40, the diameter of the guide water outlets d2=5mm, the diameter of the main water outlet d1=60mm, and the diameter of the water inlet of the directional water spraying device 02 d0=70mm.

[0139] The total height of the main water outlet pipe 021 is H3 = H1, the height of the pipe relative to the bottom of the forging is H1 = 1200 mm, and the distance between the top of the truncated cone of the guide cover and the end face of the main water outlet pipe is L1 = tanγ×

[0140] (D0 / 2)-h=39.2mm, the distance L2 that the end face of the main water outlet pipe penetrates into the forging is 200mm, the truncated cone height h of the air deflector 011 is 1000mm, the bottom diameter D0 of the truncated cone structure of the air deflector 011 is 3600mm, and the angle γ between the truncated cone side surface and the bottom surface of the truncated cone of the air deflector 011 is 30°.

[0141] The forging was cooled using the quenching cooling aid of Example 1. The simulation results are as follows: Figure 8 As shown: From the color representing the flow rate, it can be seen that the flow rate of each part of the inner wall of the forging and the inner wall of the connecting pipe is relatively uniform, and each part of the forging has achieved a good quenching and cooling effect.

[0142] Example 2

[0143] This embodiment discloses a quenching cooling auxiliary tool for a cylindrical forging with an integrated pipe connection. Figure 2-Figure 4 As shown, including:

[0144] The diversion device 01 and the directional water spraying device 02;

[0145] The flow guide device 01 includes a flow guide cover 011; the flow guide cover 011 is a hollow through-conical structure, suspended and inverted inside the forging; the horizontal cross-sectional area of ​​the flow guide cover 011 gradually increases from the side of the near directional water spray device 02 to the side of the far directional water spray device 02, thereby achieving that the water flow passing through the outer wall of the flow guide cover 011 can be diffused from the flow guide cover 011 to the inner wall of the cylinder forging.

[0146] The angle γ between the side surface of the cone of the air deflector 011 and the bottom surface of the cone is 60°, and the ratio of the bottom diameter D0 of the cone structure to the inner diameter D1 of the forging satisfies: 0.8:1, D1=4000mm.

[0147] The flow guide device 01 includes flow guide plates 012, which are dispersedly arranged on the outer wall of the flow guide cover 011, and the side surfaces of the flow guide plates 012 are fixedly connected to the outer wall;

[0148] A group of top surfaces or bottom surfaces opposite to any guide plate 012 are arranged facing the top surfaces or bottom surfaces of two adjacent guide plates 012, and the two adjacent guide plates 012 form a water flow channel 014; the width of the water outlet 0141 of any water flow channel is smaller than or larger than the width of the water outlet 0141 of the two adjacent water flow channels of the water flow channel.

[0149] There are 8 guide plates 012 and 8 water flow channels;

[0150] All water flow channels between the guide plates 012 are defined as the first water flow channel, ..., the eighth water flow channel in sequence:

[0151] The outlet widths of the first water flow channel, the third water flow channel, the fifth water flow channel, and the seventh water flow channel are smaller than the outlet widths of the adjacent even-numbered sequence water flow channels;

[0152] The width of the water outlets of the second water flow channel, the fourth water flow channel, the sixth water flow channel, and the eighth water flow channel is greater than the width of the water outlets of the adjacent odd-numbered sequence water flow channels.

[0153] The water outlet widths of the above odd-numbered and even-numbered sequence water flow channels can achieve a water flow rate at any water flow channel outlet that is greater than or less than the water flow rates at the two adjacent water flow channel outlets of the water flow channel.

[0154] The wall thickness of the connecting pipe is δ1=80mm, θ=45°, the height of the cone of the guide cover 011 is h=2000mm, and the length of the guide plate is l0=h / arccos22.5°.

[0155] The support 013 is provided with two, which are vertically cross-arranged.

[0156] The directional water spray device 02 includes a main water outlet pipe 021 and a guide water outlet pipe 022 ; the main water outlet pipe 021 may be a cylindrical hollow pipe, and a plurality of guide water outlet pipes 022 are provided and are circumferentially arranged along the side wall of the main water outlet pipe 021 .

[0157] The water outlet direction of the main water outlet pipe 021 is directly facing the water inlet of the guide cover 011, supplying water to the guide cover 011 to achieve cooling of the upper part of the forging; the guide water outlet pipe 022 can enter the water flow channel between the guide plates 012, and under the action of the odd-numbered sequence water flow channel, provide more sufficient cooling water supply for the bottom inner wall of the forging and the connecting pipe.

[0158] The included angle α between the projection of the guide water outlet pipe 022 on the horizontal plane and the projection of the outer wall of the main water outlet pipe 021 on the horizontal plane is 45°.

[0159] The included angle β between the central axis of the guide water outlet pipe 022 and the main water outlet pipe 021 is arctan(D1 / 3H1).

[0160] D1=4000mm, H1=1000mm, H2=800mm.

[0161] The guide water outlet pipes 022 are evenly arranged in the circumferential direction of the main water outlet pipe 021; the guide water outlet pipes 022 evenly arranged in the circumferential direction at the same height form an annular guide water outlet area; there are multiple annular guide water outlet areas, which are evenly arranged in the vertical direction of the main water outlet pipe 021; the annular guide water outlet area is 10 layers in the height direction of the main water outlet pipe 021.

[0162] The number of guide water outlets n=80, the diameter of the guide water outlets d2=5mm, the diameter of the main water outlet d1=50mm, and the diameter of the water inlet of the directional water spraying device 02 d0=70mm.

[0163] The total height of the main water outlet pipe 021 is H3 = 1.5H1, the height of the pipe relative to the bottom of the forging is H1 = 1000mm, and the distance between the top of the truncated cone of the guide cover and the end face of the main water outlet pipe is L1 = tanγ×

[0164] (D0 / 2)-h=771.3mm, the distance L2 that the end face of the main water outlet pipe penetrates into the forging is 200mm, the truncated cone height h of the air deflector 011 is 2000mm, the bottom diameter D0 of the truncated cone structure of the air deflector 011 is 3200mm, and the angle γ between the truncated cone side surface and the bottom surface of the truncated cone of the air deflector 011 is 60°.

[0165] Comparative Example 1

[0166] Compared with Example 1, this comparative example does not have a flow guide device, and other conditions are the same as Example 1. Fig. 9 As shown in the figure, the simulation results show that: from the color representing the flow rate, it can be seen that after the cooling water of the directional water spray device enters the forging, almost all of it flows out of the forging from the center area of ​​the forging from bottom to top, and almost no cooling water enters the inner wall and the connecting pipe of the forging, and the quenching cooling effect of various parts in the forging is poor.

[0167] Comparative Example 2

[0168] The adjacent guide plates in this comparative example have an inclination angle θ=45°. Compared with Example 1, the wall thickness δ1 of the connecting pipe is not adjusted. The connecting pipe wall thickness satisfies the following condition: δ1=160 mm. The rest is the same as Example 1.

[0169] like Fig.10 As shown, the simulation results show that: from the color representing the flow rate, it can be seen that θ is larger than that in Example 1, the amount and flow rate of cooling water entering the connecting pipe of the directional water spray device are significantly increased, the amount of cooling water entering the upper half of the forging is reduced, and the quenching cooling uniformity of various parts in the forging is poor.

[0170] Comparative Example 3

[0171] The length of the guide plate in this comparative example is l0=h / 2arccos15°, which is smaller than that in Example 1, and the rest is the same as in Example 1.

[0172] Comparative Example 4

[0173] The water inlet diameter d0 of the directional water spray device 02 of this comparative example is 60 mm, which is smaller than that of Example 1, and the rest is the same as Example 1.

[0174] like Fig.11 As shown, the simulation results show that: from the color representing the flow rate, it can be seen that θ is larger than that in Example 1, the amount and flow rate of cooling water entering the connecting pipe of the directional water spray device are significantly increased, the amount of cooling water entering the upper half of the forging is reduced, and the quenching cooling uniformity of various parts in the forging is poor.

[0175] Comparative Example 5

[0176] The distance between the top of the truncated cone of the guide cover and the end face of the water outlet of the main water outlet pipe is L1=

[0177] 1100mm, the main water outlet end face is deep into the forging distance L2 = 200mm,

[0178] H1=1200mm, the value of L1 is larger than that of Example 1, and L1+L2≤H1 is not satisfied; the rest is the same as that of Example 1.

[0179] like Fig.12 As shown, the simulation results show that: from the color representing the flow velocity, it can be seen that the distance L1 between the top of the cone of the guide cover and the end face of the outlet of the main outlet pipe is larger than that in Example 1, the cooling water contacting the inner wall of the lower half of the forging and the lower half of the connecting pipe is reduced, and the quenching cooling uniformity of various parts in the forging is poor.

[0180] The material strength of the quenched and cooled forgings prepared in the above embodiments and comparative examples can be determined to a certain extent by using a hardness test method under the premise of non-destructive sampling. The standard "GB / T 231.1-2018 Metallic Material Brinell Hardness Test Part 1: Test Method" is adopted. The forgings that have been cooled in each embodiment or comparative example are sampled and tested at four fixed positions. The performance test results of three tests are shown in Table 1 below:

[0181] Table 1 Brinell hardness test results

[0182]

[0183]

[0184]

[0185] The results show that, from Examples 1-2 and the comparative examples, the Brinell hardness of the forgings treated with the quenching and cooling device of the present invention can reach: the water outlet at the top of the forging ≥ 201.3 / J (Comparative Example 1 is 171.0 / J), the water inlet at the bottom of the forging ≥ 176.7 / J (Comparative Example 1 is 146.7 / J), the first connecting pipe ≥ 217.0 / J (Comparative Example 1 is 170.3 / J), the second connecting pipe ≥ 204.0 / J (Comparative Example 1 is 145.3 / J), and all indicators are much higher than those of Comparative Example 1 without the guide device installed. This is because the cooling water flow rate on the surface of the forging in Example 1 is more uniform than that in Comparative Example 1; for the same reason, the cooling water flow rate on the surface of the forging in Example 1 is more uniform than that in Comparative Examples 2-5, thereby obtaining a better Brinell hardness of the forging.

[0186] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A quenching and cooling auxiliary tool for a cylindrical forging with an integrated pipe, characterized in that: include: diversion devices and directional water spraying devices; The directional water spray device can spray water toward the hollow part of the forging in the vertical direction and in the direction between the horizontal and vertical directions at the same time; The flow guide device is placed inside the cylinder forging, and can guide the water flows in different directions sprayed by the directional water spray device to be evenly dispersed on the inner wall of the cylinder forging.

2. The quenching and cooling auxiliary tool for the integrated cylindrical forging with a pipe connection according to claim 1 is characterized in that: The flow guide device comprises a truncated cone structure, the outer wall of which is provided with a plurality of water flow channels extending from the top to the bottom of the truncated cone structure, and the water flow of the directional water spray device can pass through the water flow channels; The truncated cone structure is suspended and inverted inside the forging; The water flow channel is provided with a water flow channel water inlet at the top of the truncated cone structure, a first water outlet at the bottom of the truncated cone structure, and a second water outlet between the water flow channel water inlet and the first water outlet; The water in the water flow channel can freely flow in and out of the second water outlet according to the change of water pressure; The water flow channels are defined as the first water flow channel, ..., the Nth water flow channel in order according to the circumferential direction of the truncated cone structure. When N is an odd number, the width of the outlet of the Nth water flow channel is smaller than the width of the inlet of the Nth water flow channel; When N is an even number, the width of the water outlet of the Nth water flow channel is greater than the width of the water inlet of the Nth water flow channel.

3. The quenching and cooling auxiliary tool for the integrated cylindrical forging with pipe connection according to claim 2 is characterized in that: The flow guide device comprises a flow guide cover; the flow guide cover is a truncated cone structure.

4. The quenching and cooling auxiliary tool for the integrated cylindrical forging with pipe connection according to claim 3 is characterized in that: The angle γ between the truncated cone side surface and the truncated cone bottom surface of the deflector is 45°±15°, and the ratio of the truncated cone structure bottom surface diameter D0 to the forging inner diameter D1 satisfies: 0.8-0.

9.

5. The quenching and cooling auxiliary tool for the integrated cylindrical forging with pipe connection according to claim 4 is characterized in that: The flow guide device further includes a flow guide plate; a plurality of the flow guide plates are provided, which are dispersedly arranged on the outer wall of the flow guide cover, and the side surface of the flow guide plate is fixedly connected to the outer wall of the flow guide cover; A group of top surfaces or bottom surfaces opposite to each other of any guide plate are arranged facing the top surfaces or bottom surfaces of two adjacent guide plates, and the two adjacent guide plates form a water flow channel; The water flow channels are defined as the first water flow channel, ..., the Nth water flow channel in sequence according to the circumferential direction of the truncated cone structure. The water outlet width of the odd-numbered sequence water flow channels is smaller than the water inlet width of the odd-numbered sequence water flow channels; the water outlet width of the even-numbered sequence water flow channels is larger than the water inlet width of the even-numbered sequence water flow channels.

6. The quenching and cooling auxiliary tool for the integrated cylindrical forging with pipe connection according to claim 5 is characterized in that: When N is an odd number, the width of the outlet of the Nth water flow channel is smaller than the width of the adjacent outlet; When N is an even number, the width of the water outlet of the Nth water flow channel is greater than the width of the adjacent water outlets.

7. The quenching and cooling auxiliary tool for the integrated cylindrical forging with pipe connection according to claim 6 is characterized in that: The water outlet widths of the odd-numbered sequence water flow channels are the same; the water outlet widths of the even-numbered sequence water flow channels are the same.

8. The quenching and cooling auxiliary tool for the integrated cylindrical forging with pipe connection according to claim 7 is characterized in that: The inclination angle θ of adjacent guide plates is adjusted according to the pipe wall thickness δ1 to meet the following requirements: When δ1≥150mm, 15°<θ<45°; When 150>δ1≥30mm, 45°≤θ<90°.

9. The quenching and cooling auxiliary tool for the integrated cylindrical forging with pipe connection according to claim 8 is characterized in that: The length l0 of the guide plate is adjusted according to the inclination angle θ of the adjacent guide plates of the pipe connection, satisfying: 0.6h≤arccos(θ / 2)l0≤h, where h is the truncated cone height of the guide cover.

10. A method for processing a cylindrical forging with an integrated pipe, characterized in that: Use the quenching and cooling aid for the integrated cylindrical forging with a connecting pipe as described in any one of claims 1 to 9.

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