Mandrel cooling device for large ring rolling mill

Abstract

The utility model discloses a mandrel cooling device of a large ring rolling mill, which relates to the technical field of large ring rolling mill equipment parts and comprises a mandrel, a mandrel upper supporting seat, a mandrel lower supporting seat and a mandrel cooling part. The mandrel cooling part comprises an electric cylinder, an axial telescopic water pipe, a cylinder head conversion block, a C-shaped joint, a connecting block, a cooling water pipe, a water spraying hole and a tank chain; according to the utility model, the deformation of the mandrel caused by continuous high temperature and shear stress can be reduced, so that the dimensional precision of the mandrel is reduced, and the scrapping caused by unqualified precision is reduced, the service life of the mandrel is prolonged, and the production cost is reduced; the cooling system of an existing ring rolling mill is improved, the cooling water flow control precision of the mandrel in the operation process of the ring rolling mill is improved, the cooling water flow is controlled according to the operation time and the temperature detection result of the mandrel, the service life of the mandrel is prolonged, and the equipment failure rate and the product manufacturing cost are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of large-scale ring rolling machine equipment parts, in particular to a large-scale ring rolling machine core shaft cooling device. Background Art

[0002] In the field of large ring forging manufacturing, large horizontal ring rolling machine is one of the key equipment, mainly used to produce large ring forgings. Large horizontal ring rolling machine is used to process metal ring materials into required ring-shaped workpieces, such as bearing rings, gear rings, etc. through continuous plastic deformation by rolling. The performance of large horizontal ring rolling machine directly affects the quality and production efficiency of forgings. Large forgings will release a lot of heat during the ring rolling process, and the ring rolling machine will also generate a lot of heat. Therefore, it needs to withstand high temperature and high pressure during the working process, so the design and maintenance of its cooling system is particularly important. The large ring rolling machine used in the prior art generally adopts an automatic water cooling device, but the equipment has the following problems in actual use: 1) Decreased cooling effect: With the long-term use of the equipment, the water cooling system may be blocked, corroded or have reduced efficiency, resulting in reduced cooling effect. This will cause the mandrel to work at high temperature, increasing the risk of damage caused by thermal stress; 2) Mandrel material and thermal impact: The mandrel is usually made of high-strength material to withstand high temperature and mechanical stress. However, even the best materials will lose strength under continuous high temperatures, leading to plastic deformation. 3) Plastic deformation: At high temperatures, the mandrel may undergo plastic deformation, which can lead to loss of precision, affect the quality of forgings, and ultimately cause the mandrel to be scrapped. In order to ensure the continuous and efficient operation of the ring rolling machine, the cooling system needs to be regularly inspected and maintained. In summary, improving cooling efficiency, extending the service life of the mandrel, and reducing the degradation of material properties due to increased temperature are technical challenges in the design and maintenance of large horizontal ring rolling machines. Utility Model Content

[0003] The purpose of the utility model is to provide a cooling device for the core shaft of a large ring rolling machine, so as to solve the problem that in the prior art large ring rolling machines generally adopt automatic water cooling devices as mentioned in the above background technology, but the automatic water cooling device has the problem that the cooling effect decreases after long-term use. During operation, the core shaft of the ring rolling machine is in contact with the high-temperature forgings for a long time and is subjected to large shear stress. The poor cooling effect can easily cause the core shaft to reduce its strength due to the increase in temperature, and plastic deformation can easily occur after a period of use, thereby causing the core shaft to be scrapped.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a large-scale ring rolling machine mandrel cooling device, comprising a vertically arranged mandrel and having a mandrel upper support seat and a mandrel lower support seat connected to the upper and lower ends thereof respectively, a mandrel cooling part is arranged on the mandrel upper support seat; the mandrel cooling part comprises an electric cylinder arranged on the front side of the upper support seat and having an axial telescopic water pipe built therein, a cylinder head conversion block is arranged at the tail end of the axial telescopic water pipe, a C-type joint is arranged between the axial telescopic water pipe near the front end and the electric cylinder, the front end of the axial telescopic water pipe is connected to a cooling water pipe through a connecting block, the cooling water pipe is arranged parallel to the mandrel body, and a plurality of water spray holes are evenly arranged on the cooling water pipe along its axial direction close to the side of the mandrel body, and a tank chain is arranged between the connecting block and the front side of the upper support frame.

[0005] Preferably, the core shaft includes a cylindrical core shaft body in the middle and is provided with coaxial core shaft upper connecting shaft and core shaft lower connecting shaft at its upper and lower ends respectively, the core shaft upper connecting shaft is connected to the core shaft upper support seat, and the core shaft lower connecting shaft is connected to the core shaft lower support seat.

[0006] Preferably, the upper support seat of the mandrel includes an upper support frame connected to the ring rolling machine, two hydraulic cylinders are arranged on the top of the upper support frame, the piston shafts of the two hydraulic cylinders are commonly connected to a rotating motor, the bottom end of the shaft of the rotating motor is connected to a mandrel connecting piece, and is connected to the connecting shaft on the shaft; a mandrel cooling part is arranged on the upper support frame.

[0007] Preferably, the lower support seat of the mandrel includes a lower support frame connected to the ring rolling machine, and a lower bearing seat is arranged on the top surface of the lower support frame through a bracket, and the lower bearing seat is sleeved on the outer side of the lower connecting shaft of the mandrel.

[0008] Preferably, the core shaft cooling part is arranged on the upper support frame.

[0009] Preferably, the cylinder head conversion block is connected to the water tank of the ring rolling machine through an external water pipe.

[0010] Preferably, during operation, the electric cylinder is controlled by a numerical control program to drive the cooling water pipe to move up and down, and the cooling water is sprayed onto the core shaft through the water spray holes on the cooling water pipe.

[0011] Preferably, the electric cylinder can automatically adjust the position of the cooling water pipe for spraying cooling water.

[0012] Preferably, the amount of cooling water can be adjusted automatically.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model drives the cooling water pipe to move up and down through the electric cylinder, which can more accurately control the spraying position and range of the cooling water, improve the cooling efficiency, and adapt to different working conditions; effective cooling can reduce the temperature of the mandrel when working at high temperature, reduce the plastic deformation caused by thermal stress, and extend the service life of the mandrel; by maintaining the stability and accuracy of the mandrel, the size and shape errors of the forgings caused by the deformation of the mandrel can be reduced, and the overall quality of the forgings can be improved; by reducing the replacement frequency of the mandrel, the maintenance cost and downtime can be reduced, and the production efficiency can be improved; through CNC program control, the cooling process can be automated, manual operation can be reduced, and the safety and accuracy of operation can be improved; the modular design of the cooling water pipe and related components makes maintenance and replacement more convenient, and reduces the difficulty and cost of maintenance; by effectively controlling the temperature of the mandrel, the safety risks caused by high temperature can be reduced, and the safety of the working environment can be improved; by accurately controlling the amount of cooling water, unnecessary waste of water resources can be reduced, and energy-saving effects can be achieved; the utility model can also adapt to mandrels of different specifications and types, and has good versatility and expansibility.

[0015] To sum up, the use of the utility model can reduce the deformation of the mandrel caused by continuous high temperature and shear stress at the same time, thereby reducing the dimensional accuracy of the mandrel, and ultimately causing it to be scrapped due to unqualified accuracy, thereby extending the service life of the mandrel and reducing production costs; by improving the cooling system of the existing ring rolling machine, the cooling water flow control accuracy of the mandrel during the operation of the ring rolling machine is improved, the cooling water flow is controlled according to the operating time and temperature detection results of the mandrel, the service life of the mandrel is increased, and the equipment failure rate and product manufacturing costs are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the utility model;

[0017] Figure 2 for Figure 1 Structural diagram;

[0018] Figure 3 It is a schematic diagram of the installation of the mandrel and the mandrel cooling unit;

[0019] Figure 4 for Figure 3 A magnified view of middle;

[0020] Figure 5 for Figure 3 Enlarged view of middle B;

[0021] Figure 6 for Figure 3 Enlarged view of middle C;

[0022] In the figure: mandrel-1, mandrel body-11, mandrel upper connecting shaft-12, mandrel lower connecting shaft-13, mandrel upper support seat-2, upper support frame-21, hydraulic cylinder-22, rotating motor-23, mandrel connecting piece-24, mandrel lower support seat-3, lower support frame-31, lower bearing seat-32, mandrel cooling part-4, electric cylinder-41, axial telescopic water pipe-42, cylinder head conversion block-43, C-type joint-44, connecting block-45, cooling water pipe-46, water spray hole-47, tank chain-48. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the technical solution in the embodiments of the present utility model is clearly and completely described below in conjunction with the accompanying drawings and specific embodiments.

[0024] Please refer to Figure 1-6 , Figure 1 It is a schematic diagram of the utility model; Figure 2 for Figure 1 Structural diagram; Figure 3 It is a schematic diagram of the installation of the mandrel and the mandrel cooling unit; Figure 4 for Figure 3 A magnified view of middle; Figure 5 for Figure 3 Enlarged view of middle B; Figure 6 for Figure 3 Enlarged view of C in the middle.

[0025] The utility model provides a large-scale ring rolling machine mandrel cooling device, comprising a vertically arranged mandrel 1, wherein the upper and lower ends of the mandrel 1 are respectively connected to a mandrel upper support seat 2 and a mandrel lower support seat 3, and a mandrel cooling part 4 is arranged on the mandrel upper support seat 2.

[0026] The core shaft 1 includes a cylindrical core shaft body 11 in the middle, and a coaxial core shaft upper connecting shaft 12 and a core shaft lower connecting shaft 13 are respectively provided at the upper and lower ends of the core shaft body 11. The core shaft upper connecting shaft 12 is connected to the core shaft upper support seat 2, and the core shaft lower connecting shaft 13 is connected to the core shaft lower support seat 3.

[0027] The mandrel upper support seat 2 includes an upper support frame 21 connected to the ring rolling machine, and two hydraulic cylinders 22 are arranged on the top of the upper support frame 21. The piston shafts of the two hydraulic cylinders 22 are commonly connected to a rotating motor 23. The bottom end of the shaft of the rotating motor 23 is connected to a mandrel connecting piece 24, and is connected to the connecting shaft 12 on the shaft; a mandrel cooling part 4 is arranged on the upper support frame 21.

[0028] The mandrel lower support seat 3 includes a lower support frame 31 connected to the ring rolling machine, and a lower bearing seat 32 is arranged on the top surface of the lower support frame 31 through a bracket. The lower bearing seat 32 is sleeved on the outer side of the mandrel lower connecting shaft 13, thereby ensuring that the mandrel 1 can rotate unimpeded.

[0029] The core shaft cooling part 4 includes an electric cylinder 41 arranged on the upper support frame 21, and the electric cylinder 41 has an axial telescopic water pipe 42 built in. The tail end of the axial telescopic water pipe 42 is provided with a cylinder head conversion block 43 for connecting with an external water pipe, and the external water pipe is connected to the water tank of the ring rolling machine; a C-type joint 44 is provided between the axial telescopic water pipe 42 and the electric cylinder 41 near the front end, and the front end of the axial telescopic water pipe 42 is connected to a cooling water pipe 46 through a connecting block 45, and the cooling water pipe 46 is arranged parallel to the core shaft body 11, and the cooling water pipe 46 is close to the side of the core shaft body 11 and has a plurality of water spray holes 47 evenly arranged along its axial direction for spraying water to cool the core shaft body 11; a tank chain 48 is provided between the connecting block 45 and the front side of the upper support frame 21 to assist the axial movement of the connecting block 45.

[0030] When in use, the equipment is operated by controlling the electric cylinder 41 through the numerical control program to drive the cooling water pipe 46 to move up and down, and the cooling water is sprayed onto the core shaft 1 through the water spray hole 47 on the cooling water pipe 46, thereby achieving temperature control of the core shaft 1.

[0031] The electric cylinder 41 can automatically adjust the position of the cooling water pipe 46 for spraying cooling water according to the height of the product; the cooling water can automatically adjust the amount of water according to the actual detected temperature of the product.

[0032] The utility model drives the cooling water pipe to move up and down through the electric cylinder, which can more accurately control the spraying position and range of the cooling water, improve the cooling efficiency, and adapt to different working conditions; effective cooling can reduce the temperature of the mandrel when working at high temperature, reduce the plastic deformation caused by thermal stress, and extend the service life of the mandrel; by maintaining the stability and accuracy of the mandrel, the size and shape errors of the forgings caused by the deformation of the mandrel can be reduced, and the overall quality of the forgings can be improved; by reducing the replacement frequency of the mandrel, the maintenance cost and downtime can be reduced, and the production efficiency can be improved; through CNC program control, the cooling process can be automated, manual operation can be reduced, and the safety and accuracy of operation can be improved; the modular design of the cooling water pipe and related components makes maintenance and replacement more convenient, and reduces the difficulty and cost of maintenance; by effectively controlling the temperature of the mandrel, the safety risks caused by high temperature can be reduced, and the safety of the working environment can be improved; by accurately controlling the amount of cooling water, unnecessary waste of water resources can be reduced, and energy-saving effects can be achieved; the utility model can also adapt to mandrels of different specifications and types, and has good versatility and expansibility.

[0033] To sum up, the use of the utility model can reduce the deformation of the mandrel caused by continuous high temperature and shear stress at the same time, thereby reducing the dimensional accuracy of the mandrel, and ultimately causing it to be scrapped due to unqualified accuracy, thereby extending the service life of the mandrel and reducing production costs; by improving the cooling system of the existing ring rolling machine, the cooling water flow control accuracy of the mandrel during the operation of the ring rolling machine is improved, the cooling water flow is controlled according to the operating time and temperature detection results of the mandrel, the service life of the mandrel is increased, and the equipment failure rate and product manufacturing costs are reduced.

[0034] Although the embodiments of the utility model have been shown and described, it is obvious that the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, it can be understood by ordinary technicians in this field that all other embodiments obtained by making various changes, modifications, substitutions and variations to these embodiments without departing from the principle and spirit of the utility model and without making creative work, all belong to the scope of protection of the utility model.

Claims

1. A large-scale ring rolling machine mandrel cooling device, characterized in that: The invention comprises a vertically arranged mandrel (1) and is respectively connected to a mandrel upper support seat (2) and a mandrel lower support seat (3) at its upper and lower ends, and a mandrel cooling portion (4) is arranged on the mandrel upper support seat (2); the mandrel (1) comprises a cylindrical mandrel body (11) in the middle and is respectively provided with a coaxial mandrel upper connecting shaft (12) and a mandrel lower connecting shaft (13) at its upper and lower ends, the mandrel upper connecting shaft (12) is connected to the mandrel upper support seat (2), and the mandrel lower connecting shaft (13) is connected to the mandrel lower support seat (3); the mandrel upper support seat (2) comprises an upper supporting frame (21) connected to a ring rolling machine; the mandrel cooling portion (4) comprises a mandrel body (11) on the front side of the upper support seat (2) and a mandrel lower connecting shaft (13) is arranged on the front side of the mandrel An electric cylinder (41) is provided and has an axial telescopic water pipe (42) built therein, a cylinder head conversion block (43) is provided at the tail end of the axial telescopic water pipe (42), a C-type joint (44) is provided between the front end of the axial telescopic water pipe (42) and the electric cylinder (41), the front end of the axial telescopic water pipe (42) is connected to a cooling water pipe (46) through a connecting block (45), the cooling water pipe (46) is arranged parallel to the mandrel body (11), and a plurality of water spray holes (47) are evenly arranged along the axial direction of the cooling water pipe (46) on one side close to the mandrel body (11), and a tank chain (48) is provided between the connecting block (45) and the front side of the upper support frame (21).

2. The large-scale ring rolling machine mandrel cooling device according to claim 1 is characterized in that: Two hydraulic cylinders (22) are arranged at the top of the upper support frame (21), the piston shafts of the two hydraulic cylinders (22) are commonly connected to a rotating motor (23), the bottom end of the shaft of the rotating motor (23) is connected to a core shaft connecting piece (24), and is connected to the connecting shaft (12) on the shaft; a core shaft cooling part (4) is arranged on the upper support frame (21).

3. The large-scale ring rolling machine mandrel cooling device according to claim 2 is characterized in that: The mandrel lower support seat (3) comprises a lower support frame (31) connected to the ring rolling machine, a lower bearing seat (32) is arranged on the top surface of the lower support frame (31) through a bracket, and the lower bearing seat (32) is sleeved on the outer side of the mandrel lower connecting shaft (13).

4. The large-scale ring rolling machine mandrel cooling device according to claim 3 is characterized in that: The core shaft cooling portion (4) is arranged on the upper support frame (21).

5. The large-scale ring rolling machine mandrel cooling device according to claim 4 is characterized in that: The cylinder head conversion block (43) is connected to the water tank of the ring rolling machine through an external water pipe.

6. The large-scale ring rolling machine mandrel cooling device according to claim 5 is characterized in that: During operation, the electric cylinder (41) is controlled by a numerical control program to drive the cooling water pipe (46) to move up and down, and the cooling water is sprayed onto the core shaft (1) through the water spraying holes (47) on the cooling water pipe (46).

7. The large-scale ring rolling machine mandrel cooling device according to claim 6 is characterized in that: The electric cylinder (41) can automatically adjust the position of the cooling water pipe (46) for spraying cooling water.

8. The large-scale ring rolling machine mandrel cooling device according to claim 7 is characterized in that: The amount of cooling water can be adjusted automatically.

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