Large spindle bearing ring carburizing secondary quenching single-bar quenching press

Abstract

The present application discloses a single-bar quenching press for carburizing and secondary quenching of large spindle bearing rings, which relates to the technical field of heat treatment processing equipment. It includes a press bed base, on which a plurality of common expanding blocks are slidably arranged. A cone is slidably arranged on the press bed base in the vertical direction. The diameter of the cone gradually decreases in the direction close to the press bed base, and each common expanding block is distributed along the circumference of the cone. A power device for driving the sliding of the cone is arranged on the press bed base. A product expanding block is connected to the outside of each common expanding block. A cover plate is arranged on the cone, and a plurality of product pressing plates are slidably arranged on the cover plate, and the product pressing plates are used to press the upper end surface of the product. The present application can effectively solve the problems of deformation and size control existing in the process of carburizing and secondary quenching of large-sized bearing rings, and adopts a single-bar downward-pulling structure and quenching method, with a simple structure, and at the same time, it is easy to be matched with other equipment to realize automation, increasing the market application prospect.

Description

Technical Field

[0001] This application relates to the technical field of heat treatment processing equipment, and particularly to a single-bar quenching press for carburizing and secondary quenching of large spindle bearing rings. Background Art

[0002] The carburizing process of large spindle bearing rings is of great significance in the field of mechanical manufacturing, especially widely used in industries such as wind power generation. With the rapid development of the wind power industry, the requirements for large spindle bearings are getting higher and higher, especially for the precision control of their internal quality and external dimensions. However, the existing carburizing and secondary quenching equipment and technologies face many challenges when dealing with large-sized bearing rings, and it is difficult to meet the needs of modern industry.

[0003] Currently, the commonly used carburizing and secondary quenching methods in the industry mainly include manual die-setting and manual quenching, manual die-setting and automatic quenching, and automatic die-setting and automatic quenching. Although these traditional methods can achieve the purpose of carburizing and secondary quenching to a certain extent, there are still some deficiencies in the specific operation process. For example, the traditional manual die-setting and manual quenching method completely relies on manual operation, resulting in low production efficiency, delaying the quenching time, making it difficult to control the quality such as surface carbides and hardness of the product, unstable product quality, and generally having problems such as high labor intensity, poor working environment, and safety hazards. Manual die-setting and automatic quenching, although introducing a certain degree of automation, still requires manual intervention to apply the pre-tightening force by manual die-setting, and it is unable to effectively control product deformation and dimensional uniformity. And the existing automatic die-setting and automatic quenching equipment is also powerless when facing bearing rings with ultra-large sizes (diameter exceeding 2 meters), and it cannot meet the carburizing heat treatment requirements of bearing rings in the wind power industry. Therefore, it is urgent to develop a carburizing and secondary quenching process that can adapt to large-sized bearing rings, while accurately controlling product deformation and dimensional uniformity, and ensuring product quality stability. Summary of the Invention

[0004] Aiming at the problems existing in the prior art, this application provides a single-bar quenching press for carburizing and secondary quenching of large spindle bearing rings.

[0005] The single-bar quenching press for carburizing and secondary quenching of large spindle bearing rings provided by this application adopts the following technical solutions:

[0006] A single-bar quenching press for carburizing and secondary quenching of large spindle bearing rings, comprising a press base, on which a plurality of common expanding blocks are slidably arranged. On the press base, there are respectively provided expanding block pushing mechanisms for driving the sliding of each of the common expanding blocks. A cone is slidably arranged on the press base in the vertical direction. The diameter of the cone gradually decreases in the direction close to the press base, and each of the common expanding blocks is distributed along the circumference of the cone. A power device for driving the sliding of the cone is arranged on the press base. The outer side of each common expanding block is connected with a product expanding block, and the product expanding block is used to abut against the inner diameter surface of the product. A cover plate is arranged on the cone, and a plurality of product pressing plates are slidably arranged on the cover plate. On the cover plate, there are respectively provided pressing plate pushing mechanisms for driving the sliding of each of the product pressing plates, and the product pressing plates are used to press the upper end surface of the product.

[0007] Optionally, a plurality of ribs are fixedly arranged on the press base, and the upper end surfaces of the ribs are flush.

[0008] Optionally, a guiding inclined surface adapted to the cone is arranged at one end of each of the common expanding blocks close to each other.

[0009] Optionally, the product expanding block is detachably arranged on the common expanding block.

[0010] Optionally, a central column is arranged inside the cone. A cover plate connecting column is fixedly arranged at the top end of the central column. The cover plate is slidably sleeved on the cover plate connecting column. An elastic member for driving the cover plate to slide towards the direction close to the central column is arranged on the cover plate connecting column.

[0011] Optionally, an external thread is arranged on the side wall of the cover plate connecting column. An adjusting nut is threadedly connected to the cover plate connecting column, and the adjusting nut is arranged above the cover plate.

[0012] Optionally, the elastic member includes a disc spring. The disc spring is sleeved on the cover plate connecting column and is located between the adjusting nut and the cover plate. A partition plate is sleeved on the cover plate connecting column. The partition plate is arranged at the bottom of the adjusting nut. One end of the disc spring abuts against the cover plate, and the other end of the disc spring abuts against the partition plate.

[0013] Optionally, the expanding block pushing mechanism includes a connecting rod and a first driving member. The connecting rod is slidably arranged on the press base and is fixedly connected to the corresponding common expanding block. The first driving member is used to drive the sliding of the connecting rod.

[0014] Optionally, the pressing plate pushing mechanism includes a push plate, a suspension rod and a second driving member. The push plate is slidably arranged on the top of the cover plate. The suspension rod is fixedly arranged on the push plate. A through hole for the suspension rod to pass through is formed on the cover plate, and the suspension rod is fixedly connected to the corresponding product pressing plate. The second driving member is used to drive the sliding of the push plate and drive the sliding of the product pressing plate.

[0015] Optionally, the product pressing plate is detachably connected to the suspension rod.

[0016] In summary, the present application includes at least one of the following beneficial technical effects:

[0017] 1. The large-scale spindle bearing ring carburizing secondary quenching single-bar quenching press of the present application can effectively solve the deformation and size control problems existing in the carburizing secondary quenching process of large-size bearing rings. Specifically, when in use, the cone, cover plate and product pressing plate are driven to rise under the action of the power device, so that the cone is separated from each common expansion block, and each expansion block pushing mechanism is used to drive each common expansion block to approach each other, and then each pressing plate pushing mechanism is contracted to bring each product pressing plate together, and the product is hoisted to the press base through a special hoist and located outside each product expansion block. After that, the pressing plate pushing mechanism drives each product pressing plate to slide outward and is located above the product, and the cone and cover plate are driven down by the power device. Each common expansion block moves away from each other under the push of the cone, driving each product expansion block to press against the inner diameter surface of the product. At the same time, each product pressing plate presses the upper end surface of the product, so as to locate and correct the position of the product, and put the inner diameter surface and end surface of the product under restriction or pressure, effectively controlling the deformation and size of the product during the quenching process.

[0018] 2. This application makes the product expansion block detachable and arranged on the common expansion block, so that the press can flexibly replace the corresponding product expansion block according to the bearing rings of different sizes and shapes, thereby adapting to the processing requirements of products of various specifications. This design not only improves the versatility and flexibility of the equipment, but also simplifies the maintenance and adjustment process, reducing production costs and time.

[0019] 3. This application further increases practicality by sliding the product pressure plate on the cover plate connecting column at the top of the cone and controlling the maximum distance between the cover plate and the cone by adjusting the nut, so as to adapt to the press-fitting of products of different sizes. Furthermore, the disc spring is set to provide sufficient support force between the cover plate and the cone. When the product pressure plate presses the product, as the cover plate slides down, the product pressure plate first pre-presses the product through the elastic force of the disc spring to control the moving direction of the product. As the product expansion block corrects the position of the product, the compression force of the product pressure plate gradually increases, and finally the product pressure plate completely compresses the upper end surface of the product to limit the position of the product, avoiding the product warping phenomenon when the product expansion block is pressed against the inner diameter surface of the product, or because the compression force of the product pressure plate is too large, resulting in the inability of the cover plate and the cone to continue to move down, and then the inability to push the product expansion block, so that the product expansion block cannot effectively press against the inner diameter surface of the product and limit the inner diameter surface of the product.

[0020] 4. By designing the product pressing plate to be detachably connected to the hanging rod in this application, the product pressing plate can be replaced and adjusted according to bearing rings of different sizes and shapes, further improving the flexibility and adaptability of the equipment. Description of the Drawings

[0021] Figure 1 is the overall structural sectional view of the embodiment of this application;

[0022] Figure 2 is the structural schematic diagram for expressing the expansion block pushing mechanism in the embodiment of this application;

[0023] Figure 3 is the structural schematic diagram for expressing the pressing plate pushing mechanism in the embodiment of this application.

[0024] Description of the Reference Numerals: 1. Press bed base; 11. Power device; 12. Support column; 13. Rib; 14. Sleeve; 15. Hydraulic cylinder connecting column; 16. Connecting rod; 17. First driving member; 2. Common expansion block; 21. Product expansion block; 3. Cone; 31. Central column; 32. Cover plate connecting column; 33. Adjusting nut; 34. Disc spring; 35. Partition; 4. Cover plate; 41. Product pressing plate; 411. Threaded hole; 42. Push plate; 43. Hanging rod; 431. Screw rod; 432. Mounting nut; 44. Second driving member; 45. Through hole; 46. Equal height ring. Detailed Embodiment

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the attached Figure 1 - attached Figure 3 , the described embodiments are only possible technical implementations of the present invention, not all possible implementations. Those skilled in the art can fully combine the embodiments of the present invention to obtain other embodiments without creative labor, and these embodiments are also within the protection scope of the present invention.

[0026] The inventors of this application found that existing carburizing secondary quenching equipment and technologies face many challenges when dealing with large-sized bearing rings, and it is difficult to effectively solve the deformation and dimensional control problems of large-sized bearing rings during the carburizing secondary quenching process. For this reason, this application discloses a single-bar quenching press for carburizing secondary quenching of large-sized main shaft bearing rings, mainly adopting the following solutions:

[0027] The embodiment of this application discloses a single-bar quenching press for carburizing secondary quenching of large-sized main shaft bearing rings. Refer to Figure 1, including a press base 1, a plurality of common expansion blocks 2 are slidably arranged on the press base 1, a cone 3 is slidably arranged on the press base 1 in the vertical direction, the diameter of the cone 3 gradually decreases along the direction close to the press base 1, each common expansion block 2 is distributed along the circumference of the cone 3, a power device 11 for driving the cone 3 to slide is arranged on the press base 1, a product expansion block 21 is connected to the outer side of each common expansion block 2, a cover plate 4 is arranged on the cone 3, and a plurality of product pressing plates 41 are slidably arranged on the cover plate 4. This structural design can effectively control the deformation and dimensional uniformity of large-size bearing rings during carburizing secondary quenching, thereby improving product quality stability.

[0028] Reference Figure 1 The press base 1 is used as the supporting foundation of the entire system and is made of high-strength steel to ensure that it will not deform when subjected to heavy loads. A support column 12 is fixedly connected to the bottom of the press base 1. A plurality of ribs 13 are fixedly arranged on the press base 1. The upper end surfaces of the ribs 13 are flush to enhance the rigidity and stability of the press base 1. The common expansion block 2 and the product expansion block 21 are both slidably arranged on the ribs 13. This makes the sliding of the common expansion block 2 and the product expansion block 21 smoother.

[0029] Reference Figure 1 The cone 3 is made of high-strength alloy steel and has good wear resistance and fatigue resistance. The power device 11 adopts a hydraulic cylinder, which is fixedly arranged at the bottom of the press base 1. A sleeve 14 is fixedly arranged at the bottom of the press base 1. A hydraulic cylinder connecting column 15 is slidably penetrated in the sleeve 14. A mounting hole for the hydraulic cylinder connecting column 15 to pass through is opened on the press base 1. The cone 3 is fixed to the hydraulic cylinder connecting column 15 by bolts.

[0030] Reference Figure 1 , 2 The common expansion block 2 is made of high-strength alloy steel, has good wear resistance and fatigue resistance, and can maintain stable performance during frequent telescopic movements. The common expansion block 2 is provided with a guiding slope adapted to the cone 3 at one end close to each other, so that the common expansion block 2 can expand or contract smoothly when the cone 3 moves up and down.

[0031] Reference Figure 2, the product expansion block 21 is fixedly arranged on the common expansion block 2 through bolts and is detachably connected to the common expansion block 2, which is convenient for replacing the corresponding product expansion block 21 according to bearing rings of different sizes. The product expansion block 21 is also made of high-strength alloy steel, with its surface precisely ground. Moreover, multiple layers of steps are arranged on the outer side wall of the product expansion block 21 to adapt to the inner diameter surface of the bearing ring, ensuring a high degree of fit when it contacts the inner diameter surface of the bearing ring. And by detachably arranging the product expansion block 21 on the common expansion block 2, the press can flexibly replace the corresponding product expansion block 21 according to bearing rings of different sizes and shapes, thus meeting the processing requirements of various specifications of products. This design not only improves the versatility and flexibility of the equipment, but also simplifies the maintenance and adjustment process, reducing production costs and time.

[0032] Refer to Figure 2 , on the press base 1, expansion block pushing mechanisms for driving each common expansion block 2 to slide are respectively arranged. Specifically, the expansion block pushing mechanism includes a connecting rod 16 and a first driving member 17. The connecting rod 16 is slidably arranged on the press base 1 and is fixedly connected to the corresponding common expansion block 2 through bolts. The first driving member 17 is an air cylinder, and the air cylinder is fixedly arranged at the bottom of the press base 1. The piston rod of the air cylinder is fixedly connected to the connecting rod 16 for driving the connecting rod 16 to slide. The first driving member 17 can also be a hydraulic cylinder, an electric push rod, a linear motor, etc.

[0033] Refer to Figure 1 , 2 , a central column 31 is slidably inserted into the cone 3. The top end of the central column 31 is fixedly provided with a cover plate connecting column 32. The central column 31 and the cover plate connecting column 32 are parallel in the length direction. The cover plate 4 is slidably sleeved on the cover plate connecting column 32 and slides along the length direction of the cover plate connecting column 32. External threads are provided on the side wall of the cover plate connecting column 32, and an adjusting nut 33 is threadedly connected to the cover plate connecting column 32, and the adjusting nut 33 is arranged above the cover plate 4. By rotating the adjusting nut 33, the distance between the cover plate 4 and the cone 3 can be adjusted, and further the extended length of the product expansion block 21 can be adjusted to be suitable for bearing rings of different sizes.

[0034] Refer to Figure 2 , an elastic member for driving the cover plate 4 to slide towards the central column 31 is arranged on the cover plate connecting column 32. The elastic member is a disc spring 34. The disc spring 34 is sleeved on the cover plate connecting column 32 and is located between the adjusting nut 33 and the cover plate 4. A partition plate 35 is sleeved on the cover plate connecting column 32. The partition plate 35 is arranged at the bottom of the adjusting nut 33, and one end of the disc spring 34 abuts against the cover plate 4, and the other end abuts against the partition plate 35. The disc spring 34 has large elasticity and a long service life, and can effectively buffer the impact force generated during the downward sliding of the cover plate 4. In addition, other types of elastic elements such as a spiral spring or an airbag can also be selected to meet the requirements of different working conditions.

[0035] The provision of the disc spring 34 enables sufficient supporting force between the cover plate 4 and the cone 3. When the product pressing plate 41 presses the product, as the cover plate 4 slides down, the product pressing plate 41 first pre-presses the product through the elastic force of the disc spring 34 to control the moving direction of the product. As the product expansion block 21 corrects the position of the product, the pressing force of the product pressing plate 41 gradually increases. Finally, the product pressing plate 41 completely presses the upper end surface of the product, realizing the limiting of the product, and avoiding the phenomenon of the product warping during the process of the product expansion block 21 pressing against the inner diameter surface of the product, or because the pressing force of the product pressing plate 41 is too large, resulting in the cover plate 4 and the cone 3 being unable to continue to move down, and thus unable to push the product expansion block 21, making the product expansion block 21 unable to effectively press against the inner diameter surface of the product and limit the inner diameter surface of the product.

[0036] Refer to Figure 2 , 3 , pressing plate driving mechanisms for driving the sliding of each product pressing plate 41 are respectively arranged on the cover plate 4. Specifically, the pressing plate driving mechanism includes a push plate 42, a suspension rod 43 and a second driving member 44. The push plate 42 is slidably arranged on the top of the cover plate 4. A plurality of suspension rods 43 are provided and are all fixedly arranged at the bottom end of the push plate 42. Through holes 45 for the suspension rods 43 to pass through are formed on the cover plate 4, and the suspension rods 43 are fixedly connected with the corresponding product pressing plates 41. The second driving member 44 uses a pneumatic cylinder. The pneumatic cylinder is fixedly arranged on the top of the cover plate 4, and the piston rod of the pneumatic cylinder is fixedly connected with the push plate 42 for driving the push plate 42 to slide, thereby driving the corresponding product pressing plate 41 to slide. The second driving member 44 can also be a hydraulic cylinder, an electric push rod, a linear motor, etc.

[0037] Refer to Figure 3 , in order to facilitate the replacement or maintenance of the product pressing plate 41, the product pressing plate 41 is detachably connected with the suspension rod 43. Specifically, screw rods 431 are fixedly arranged at both ends of the suspension rod 43. Threaded holes 411 adapted to the screw rods 431 are formed on the product pressing plate 41. The screw rod 431 on one side of the suspension rod 43 passes through the threaded hole 411 of the product pressing plate 41 and is in threaded cooperation with the product pressing plate 41. The screw rod 431 on the side of the suspension rod 43 away from the product pressing plate 41 penetrates through the push plate 42, and a mounting nut 432 is threadedly connected to the screw rod 431 penetrating through the push plate 42. Through the design of detachably connecting the product pressing plate 41 with the suspension rod 43, the product pressing plate 41 can be replaced and adjusted according to bearing rings of different sizes and shapes, further improving the flexibility and adaptability of the equipment.

[0038] Refer to Figure 3A contour ring 46 is also provided between the product pressing plate 41 and the cover plate 4. The contour ring 46 ensures that the lower end surfaces of the product pressing plates 41 are located in the same plane and ensures the structural stability of the product pressing plates 41. Furthermore, by replacing the contour rings 46 of different lengths and adjusting the height difference of the product pressing plates 41, the press-fitting of special-shaped products can be achieved, further increasing the practicality and flexibility of the equipment.

[0039] The implementation principle of a large-scale spindle bearing ring carburizing secondary quenching single-bar quenching press according to the embodiment of the present application is as follows: when in use, the hydraulic cylinder drives the cone 3, the cover plate 4 and the product pressing plate 41 to rise under the action of the hydraulic system, so that the cone 3 is separated from each common rising block 2, and each common rising block 2 is driven to move closer to each other through each rising block pushing mechanism, and then each pressing plate pushing mechanism is contracted to bring each product pressing plate 41 closer to each other, and the product is hoisted to the rib 13 of the press base 1 through a special hoist, and is located outside each product rising block 21. After that, the pressure plate pushing mechanism drives each product pressure plate 41 to slide outward and is located above the product, and drives the cone 3 and the cover plate 4 to slide down through the hydraulic cylinder. The common rising blocks 2 are pushed away from each other by the cone 3, driving the product rising blocks 21 to press against the inner diameter surface of the product. At the same time, the upper end surface of the product is pressed by each product pressure plate 41, so as to locate and correct the position of the product, and make the inner diameter surface and end surface of the product under restriction or pressure, so as to effectively control the deformation and size of the product during the quenching process.

[0040] After the product quenching is completed, each platen pushing mechanism retracts each product platen 41 into place; then, under the action of the hydraulic system, the hydraulic cylinder drives the cone 3, the cover plate 4 and each platen to rise; each common riser 2 and the product riser 21 are retracted to each other under the action of the riser pushing mechanism, and the demoulding is completed, and the press is in the basic position. This large-scale spindle bearing ring carburizing secondary quenching single-bar quenching press effectively solves the deformation and size control problems of large-size bearing rings during carburizing secondary quenching.

[0041] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A single-bar quenching press for secondary quenching of carburized large spindle bearing rings, characterized in that: It includes a press bed base (1), on which a plurality of common expanding blocks (2) are slidably arranged. On the press bed base (1), there are respectively provided expanding block pushing mechanisms for driving each of the common expanding blocks (2) to slide. A cone (3) is slidably arranged on the press bed base (1) in the vertical direction. The diameter of the cone (3) gradually decreases in the direction close to the press bed base (1), and each of the common expanding blocks (2) is distributed along the circumference of the cone (3). A power device (11) for driving the cone (3) to slide is arranged on the press bed base (1). The outer side of each common expanding block (2) is connected with a product expanding block (21), and the product expanding block (21) is used to press against the inner diameter surface of the product. A cover plate (4) is arranged on the cone (3), and a plurality of product pressing plates (41) are slidably arranged on the cover plate (4). On the cover plate (4), there are respectively provided pressing plate pushing mechanisms for driving each of the product pressing plates (41) to slide, and the product pressing plates (41) are used to press the upper end surface of the product; A central column (31) is inserted into the cone (3). The top end of the central column (31) is fixedly provided with a cover plate connecting column (32). The cover plate (4) is slidably sleeved on the cover plate connecting column (32). An elastic member is arranged on the cover plate connecting column (32) for driving the cover plate (4) to slide towards the direction close to the central column (31); The side wall of the cover plate connecting column (32) is provided with an external thread. An adjusting nut (33) is threadedly connected to the cover plate connecting column (32), and the adjusting nut (33) is arranged above the cover plate (4); The elastic member includes a disc spring (34). The disc spring (34) is sleeved on the cover plate connecting column (32) and is located between the adjusting nut (33) and the cover plate (4). A partition plate (35) is sleeved on the cover plate connecting column (32). The partition plate (35) is arranged at the bottom of the adjusting nut (33). One end of the disc spring (34) abuts against the cover plate (4), and the other end of the disc spring (34) abuts against the partition plate (35); The pressing plate pushing mechanism includes a push plate (42), a suspension rod (43) and a second driving member (44). The push plate (42) is slidably arranged on the top of the cover plate (4). The suspension rod (43) is fixedly arranged on the push plate (42). A through hole (45) for the suspension rod (43) to pass through is formed on the cover plate (4), and the suspension rod (43) is fixedly connected with the corresponding product pressing plate (41). The second driving member (44) is used to drive the push plate (42) to slide and drive the product pressing plate (41) to slide.

2. A single-bar quenching press for carburizing and secondary quenching of large spindle bearing rings according to claim 1, characterized in that: A plurality of ribs (13) are fixedly arranged on the press bed base (1), and the upper end surfaces of the ribs (13) are flush; 3. A single-bar quenching press for secondary quenching of carburized large spindle bearing rings according to claim 1, characterized in that: One end of each of the common expanding blocks (2) close to each other is provided with a guiding inclined surface adapted to the cone (3); 4. A single-bar quenching press for secondary carburizing quenching of a large spindle bearing ring according to claim 1, characterized in that: The product expanding block (21) is detachably arranged on the common expanding block (2).

5. A single-bar quenching press for carburizing and secondary quenching of large spindle bearing rings according to claim 1, characterized in that: The rising block pushing mechanism includes a connecting rod (16) and a first driving member (17). The connecting rod (16) is slidably arranged on the press bed base (1) and is fixedly connected to the corresponding common rising block (2). The first driving member (17) is used to drive the connecting rod (16) to slide.

6. A single-bar quenching press for secondary quenching of carburized large spindle bearing rings according to claim 1, characterized in that: The product pressing plate (41) is detachably connected to the hanging rod (43).

Images