Hoisting tool for quenching ring parts

Abstract

The utility model relates to the technical field of quenching tools, and particularly discloses a hoisting tool for quenching ring parts, which comprises a hoisting ring, a first bottom plate, a second bottom plate, a first group of movable ropes, a second group of movable ropes and a plurality of limiting blocks, one end of the first group of movable ropes is fixedly mounted on the first bottom plate, the other end of the first group of movable ropes is fixedly mounted on the lifting ring, the first group of movable ropes comprises a plurality of first movable ropes, and a first penetrating space allowing the ring parts to penetrate through is formed between every two adjacent first movable ropes; one end of the second group of movable ropes is fixedly mounted on the second bottom plate, the other end of the second group of movable ropes is fixedly mounted on the hanging ring, the second group of movable ropes comprises a plurality of second movable ropes, and a second penetrating space allowing the ring parts to penetrate through is formed between every two adjacent second movable ropes. According to the utility model, the product quality of quenched ring parts can be improved.

Description

Technical Field

[0001] This utility model relates to the field of quenching tooling technology, and in particular to a hoisting tooling for quenching ring-shaped parts. Background Technology

[0002] Quenching is a heat treatment process in which a workpiece is heated to above its critical temperature, held at that temperature for a period of time to induce complete or partial austenitization, and then rapidly cooled at a rate greater than the critical cooling rate to induce martensitic or bainitic transformation. The purpose of quenching is to induce martensitic or bainitic transformation in supercooled austenite, resulting in a martensitic or bainitic microstructure. This is then followed by tempering at different temperatures to significantly improve the rigidity, hardness, wear resistance, fatigue strength, and toughness of the steel, thereby meeting the diverse application requirements of various mechanical parts and tools.

[0003] The quenching of ring-shaped parts differs from that of other parts. Because ring-shaped parts typically bear bending, torsion, and radial and axial loads, special attention must be paid during quenching to ensure the roundness and dimensional stability of the ring, while minimizing deformation and internal stress. Furthermore, to achieve uniform hardness and good mechanical properties...

[0004] In most cases, when quenching existing ring-shaped parts, the parts are directly suspended by a chain through the inner ring. The contact area between the ring-shaped part and the chain is extremely small. Excessive quenching pressure can easily cause the ring-shaped part to deform and crack. It can also lead to uneven hardness distribution after quenching, affecting the overall performance. When the ring-shaped part comes out of the furnace, the temperature is extremely high, reaching more than 900 degrees Celsius. The operator needs to be in close contact with the ring-shaped part when threading the chain, which increases the safety risk.

[0005] In other existing technologies, such as the lifting fixture for workpiece surface quenching described in patent application number CN202120899369.6, the fixture clamps ring-shaped parts onto the fixture by installing bolts on the inner side of its annular body. While commercially available annular parts generally have positioning holes on their sides, the size, shape, and number of these holes vary. Using this fixture to clamp annular parts requires specific dimensions and structures for the positioning holes on the sides of the annular parts, resulting in low applicability and poor flexibility. Furthermore, because bolts need to be inserted into the positioning holes for fixation, the annular part is relatively large compared to the bolts during quenching, resulting in a small contact area between each bolt and the annular part. Excessive pressure during quenching can easily cause deformation and cracking of the annular part, reducing its quality after quenching.

[0006] For example, a quenching and hoisting tool for large ring-shaped parts, patent application number CN201420671822.8, requires the square tube to be extended into place, the moving hoist to contact the fixed lifting ring, and the force applied to the circular tube. The workpiece must then be horizontally hoisted out for quenching. This is inconvenient when clamping ring-shaped parts, takes a long time, and requires the parts to be placed in a heat treatment furnace before clamping. In the furnace, due to the high temperature, the operator can only observe and operate from a distance, making clamping difficult. Utility Model Content

[0007] To improve the product quality of ring-shaped parts after quenching, this basic solution provides a lifting fixture for quenching ring-shaped parts.

[0008] A lifting fixture for quenching ring-shaped parts includes a lifting ring, a first base plate, a second base plate, a first set of movable ropes, a second set of movable ropes, and multiple limiting blocks. One end of the first set of movable ropes is fixedly installed on the first base plate, and the other end is fixedly installed on the lifting ring. The first set of movable ropes includes multiple first movable ropes, and a first passage space for the ring-shaped part to pass through is formed between two adjacent first movable ropes. One end of the second set of movable ropes is fixedly installed on the second base plate, and the other end is fixedly installed on the lifting ring. The second set of movable ropes includes multiple second movable ropes, and a second passage space for the ring-shaped part to pass through is formed between two adjacent second movable ropes. The first base plate and the second base plate are located on the same horizontal plane. The first and second base plates are in an open / closed state, forming a quenching gap between them. This gap is used for quenching the bottom surface of the ring-shaped parts. Multiple limiting blocks are fixedly installed on both the first and second base plates, forming a flat space for placing the ring-shaped parts. The ring-shaped parts are placed flat on the first and second base plates. The limiting blocks are located close to the edges of the first and second base plates, and clamping gaps are provided between the limiting blocks and the edges of the first and second base plates. The width of the clamping gaps is not less than 50 mm and not more than 200 mm. The clamping gaps provided on the first and second base plates are used to clamp the first and second base plates into the heat treatment furnace.

[0009] Beneficial effects: Compared with existing technologies, the structure of this basic solution is different. First, by setting a first base plate and a second base plate on the same horizontal plane, the ring-shaped parts can be placed flat on the first base plate and the second base plate. The parts are subjected to uniform force, the products are less prone to deformation, the hardness distribution is more uniform, and the quality of the ring-shaped parts after quenching is improved.

[0010] Secondly, operators do not need to have close contact with the ring-shaped parts, which reduces the labor intensity of operators and the safety risks of working in high-temperature environments for a long time.

[0011] Furthermore, the first and second base plates can be opened and closed to increase the area for placing the flat plate, making it suitable for common ring-shaped parts on the market. It does not have any special requirements for the structure of the ring-shaped parts, making it highly applicable and flexible.

[0012] Meanwhile, by setting up multiple through-spaces for ring-shaped parts to pass through and place on the base plate, there is no need to operate in a heat treatment furnace, making clamping simple and improving clamping efficiency.

[0013] Next, the clamping gap width is between 50-200mm, which not only increases the contact area with the heat treatment furnace, making the clamping more stable, but also ensures that the limited area on the base plate can accommodate the placement of various ring-shaped parts of different specifications.

[0014] Finally, the tooling can be reused, the tooling components are simple, and the manufacturing and maintenance costs are low.

[0015] Preferably, a semi-circular pull ring is fixedly installed on one side of the first base plate, and the semi-circular pull ring is close to the clamping gap; a semi-circular pull ring is also fixedly installed on one side of the first base plate, and the semi-circular pull ring is close to the clamping gap; the two semi-circular lifting rings located on different sides of the base plate are symmetrically distributed along the central axis between the first base plate and the second base plate.

[0016] Beneficial effects: The semi-circular pull ring is used to facilitate the operator to pull the base plate, so that the first base plate and the second base plate are in an open and closed state, and can also position the heat treatment furnace, so that the base plate can be better inserted into the heat treatment furnace.

[0017] Preferably, the radius of the semicircular pull ring is not less than 50mm and not more than 100mm.

[0018] Beneficial effects: When the radius of the semicircular pull ring is greater than 100mm, the area in the heat treatment furnace for clamping the tooling is limited due to the proximity of the pull ring to the clamping gap. A larger radius results in a smaller clamping gap, leading to a smaller contact area with the heat treatment furnace and increasing the risk of loose clamping and detachment of ring-shaped parts. Conversely, a radius less than 50mm makes it difficult for operators to pull the pull ring. Therefore, a radius of 50-100mm not only increases the clamping gap length, resulting in a larger contact area between the base plate and the heat treatment furnace for improved tooling stability, but also facilitates the operation of the pull ring to separate the first and second base plates.

[0019] Preferably, the first movable rope and the second movable rope are respectively a first wire rope and a second wire rope; the length of the first wire rope and the second wire rope is not more than 5000mm and not less than 2000mm.

[0020] Beneficial effects: When the length of the movable rope is greater than 5000mm, it becomes more difficult to pull up the entire fixture due to the lever principle. However, if the length of the movable rope is less than 2000mm, there are limitations on the height of ring-shaped parts. Therefore, when the length of the movable rope is 2000-5000mm, it is not only easier to pull up the fixture, but it also allows most ring-shaped parts on the market to be placed on the bottom plate.

[0021] Preferably, two limiting blocks are installed on each base plate, and the two limiting blocks are arranged in a figure-eight shape; a friction block is laid between the two limiting blocks.

[0022] Beneficial effects: The two limiting blocks are in the shape of an "eight". Compared with other shapes of limiting blocks, since the tooling mainly places ring-shaped parts, the outer ring radius of ring parts of different specifications will be different. The "eight" shaped limiting blocks can satisfy the limiting of various ring parts of different specifications. At the same time, it increases the area of ​​the flat space, so that various ring parts of different specifications can be placed in the space surrounded by the limiting blocks.

[0023] Preferably, the distance between the two limiting blocks is 700mm.

[0024] Beneficial effects: It can be used to place various sizes of different types of parts.

[0025] Preferably, the height of the limiting block is not less than 100mm and not more than 300mm.

[0026] Beneficial effects: If the height of the limiting block is less than 100mm, it is difficult to effectively limit the movement of ordinary ring-shaped parts. If the height of the limiting block is greater than 300mm, it increases the weight of the entire fixture, and the pressure from the limiting block on the base plate when it is lifted is greater. Furthermore, placing the ring-shaped parts flat on the two base plates increases the risk of the movable rope breaking due to the weight of the limiting block and the ring-shaped parts. Therefore, a limiting block height of 100-300mm not only provides effective limiting but also reduces the overall weight of the fixture, lightens the burden on the base plate and the movable rope, and prevents the risk of damage to the movable rope.

[0027] Preferably, the friction block is trapezoidal and is used to conform to the bottom surface contour of the ring-shaped part.

[0028] Beneficial effects: The friction block is trapezoidal, which can fit the bottom contour of the ring-shaped part over a large area, making the ring-shaped part less likely to fall off and enhancing the stability of the ring-shaped part when placed on two base plates.

[0029] Preferably, the area of ​​the quenching gap is 0.4m². 2 It accounts for 70% of the bottom surface area of ​​ring-shaped parts.

[0030] Beneficial effect: The area of ​​the quenching gap is 0.4m².2 The quenching gap area accounts for 70% of the bottom surface area of ​​the ring-shaped part. This provides sufficient area for quenching, but if the area is too large, the ring-shaped part is prone to detaching from the two base plates, damaging it. If the area is too small, the quenching speed will be slow, easily reducing quenching efficiency. Therefore, the quenching area is 0.4m². 2 This not only ensures the quenching efficiency of ring-shaped parts, but also prevents the risk of ring-shaped parts falling off and being damaged due to excessive quenching gaps.

[0031] Preferably, the first base plate and the second base plate are respectively a first steel plate and a second steel plate.

[0032] Beneficial effects: The steel plate can withstand high temperatures without deformation or damage, making it suitable for the high-temperature environment required during quenching. The steel plate provides robust support, ensuring that it will not bend or break when handling heavy-duty ring-shaped parts, thus guaranteeing the safety and stability of the machining process. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of a hoisting fixture (including ring-shaped parts) for quenching ring-shaped parts, as shown in Embodiment 1.

[0034] Figure 2 This is a top view of a hoisting fixture for quenching ring-shaped parts according to Embodiment 1;

[0035] Figure 3 This is a side view of a hoisting fixture for quenching ring-shaped parts according to Embodiment 1;

[0036] Figure 4 This is a schematic diagram of the heat treatment furnace in Example 1;

[0037] Figure 5 This is a top view schematic diagram of a hoisting fixture for quenching ring-shaped parts, as shown in Embodiment 2. Detailed Implementation

[0038] The reference numerals in the accompanying drawings include:

[0039] 1. Lifting ring, 2. First set of movable ropes, 3. Second set of movable ropes, 4. Ring-shaped parts, 5. Limiting block, 6. First base plate, 7. Second base plate, 8. Semi-circular pull ring, 9. Friction block, 10. Heat treatment furnace, 11. Clamping area.

[0040] Example 1

[0041] like Figure 1 As shown, this embodiment provides a hoisting fixture for quenching ring-shaped parts 4, including a lifting ring 1, a first base plate 6, a second base plate 7, a first set of movable ropes 2, a second set of movable ropes 3, and four limiting blocks 5.

[0042] Specifically, one end of the first set of movable ropes 2 is fixedly installed on the first base plate 6, and the other end is fixedly installed on the lifting ring 1. The first set of movable ropes 2 includes two first movable ropes, and a first passage space is formed between two adjacent first movable ropes for the ring-shaped part 4 to pass through. One end of the second set of movable ropes 3 is fixedly installed on the second base plate 7, and the other end is fixedly installed on the lifting ring 1. The second set of movable ropes 3 includes two second movable ropes, and a second passage space is formed between two adjacent second movable ropes for the ring-shaped part 4 to pass through. A third passage space is also formed between two adjacent first and second movable ropes for the ring-shaped part 4 to pass through. This provides multiple passage spaces, allowing the movable ropes to pass through the ring-shaped part from any four sides (front, back, left, right), facilitating the placement of the ring-shaped part 4 on the base plate. The first base plate 6 and the second base plate 7 are located on the same horizontal plane and are in an open / closed state. A quenching gap is formed between the first base plate 6 and the second base plate 7 for quenching the bottom surface of the ring-shaped part 4. The space formed between the first base plate 6, the second base plate 7, the lifting ring 1, and the movable rope can be a cone structure, with the lifting ring 1 being the cone at the top. The first movable rope and the second movable rope are respectively the first wire rope and the second wire rope; the lengths of the first wire rope and the second wire rope are not more than 5000mm and not less than 2000mm.

[0043] like Figure 2 As shown, two limiting blocks 5 are fixedly installed on the first base plate 6 and the second base plate 7 respectively. The four limiting blocks 5 surround each other to form a flat space for placing the ring-shaped part 4; the ring-shaped part 4 is placed flat on the first base plate 6 and the second base plate 7. Figure 2 As shown, the distance between the two limiting blocks 5 is e, where e = 700 mm. A semi-circular pull ring 8 is also fixedly installed on the left side of the first base plate 6, close to the clamping gap. A semi-circular pull ring 8 is also fixedly installed on the right side of the second base plate 7, also close to the clamping gap; the two semi-circular lifting rings 1 located on different sides of the base plates are symmetrically distributed along the central axis between the first base plate 6 and the second base plate 7. The radius of the semi-circular pull ring 8 is b, which is not less than 50 mm and not more than 100 mm. In this embodiment, b = 100 mm.

[0044] Specifically, such as Figure 3 As shown, the limiting block 5 is located close to the edges of the first base plate 6 and the second base plate 7, respectively, and a clamping gap is left between the limiting block 5 and the edges of the first base plate 6 and the second base plate 7; wherein the width of the clamping gap is 'a', which is not less than 50mm and not more than 200mm. In this embodiment, a = 200mm. The width of the quenching gap is 'd', which = 500mm, and the area of ​​the quenching gap is 0.4m². 2 The height of the limit block 5 is c, where 100 ≤ c ≤ 300 mm.

[0045] The clamping gaps provided in the first base plate 6 and the second base plate 7 are used to clamp the first base plate 6 and the second base plate 7 into the heat treatment furnace 10, respectively. The heat treatment furnace 10 is prior art, and its model is a natural gas bogie hearth furnace. Figure 4 As shown, the heat treatment furnace 10 is provided with a clamping area 11, which is used to support the first base plate 6 and the second base plate 7 respectively. In this embodiment, the first base plate 6 and the second base plate 7 have the same structural dimensions, and the first base plate 6 and the second base plate 7 are the first steel plate and the second steel plate respectively.

[0046] The usage method of this embodiment

[0047] S1. Attach the lifting ring 1 to the crane hook, thereby lifting the two base plates. Under the traction of the wire rope, the first base plate 6 and the second base plate 7 are in a closed, mutually abutting state. Then, pass the ring-shaped part 4 to be processed through the movable rope. Even if it touches the wire rope, it will not damage the outer surface of the ring-shaped part 4. Next, place the ring-shaped part 4 in the flat space surrounded by the limiting block 5, supported by the base plate.

[0048] S2, the crane is driven to the vicinity of the heat treatment furnace 10, and the base plate is aligned parallel to the clamping area 11 of the heat treatment furnace 10. The operator uses an iron hook to hook the semi-circular pull ring 8 to separate the two base plates. Separating the two base plates is to align the first base plate 6 and the second base plate 7 with the clamping area 11 of the heat treatment furnace 10, respectively. Then, the crane pushes the fixture into the clamping area 11, where the clamping gap of the fixture is located within the clamping area 11. At this time, there is a gap between the first base plate 6 and the second base plate 7. This gap is the quenching gap, which is used for quenching the bottom surface of the ring-shaped part 4.

[0049] S3, the ring-shaped part 4 is quenched in the quenching tank.

[0050] The ring-shaped part 4 can be placed flat on the tooling, so that the part is subjected to uniform force, the product is less likely to deform, the hardness distribution is more uniform, and the performance is better. The tooling is reusable, the tooling components are simple, the manufacturing and maintenance costs are low, and the operation is convenient. It reduces the labor intensity of operators and the safety risks caused by working in high-temperature environments for a long time, thereby improving production efficiency and reducing production costs.

[0051] Example 2

[0052] Unlike Example 1, as Figure 5 As shown, the hoisting fixture for quenching a ring-shaped part 4 provided in this embodiment also includes a friction block 9. The friction block 9 is laid between two limiting blocks 5. The friction block 9 has a wavy stripe shape and a trapezoidal shape when viewed from above, and is used to conform to the outer surface contour of the ring-shaped part 4.

[0053] Beneficial effects of this embodiment

[0054] The contact area between the tooling and the part is designed with a wavy texture to increase the friction between the tooling and the ring-shaped part 4, ensuring that the ring-shaped part 4 does not fall off.

[0055] The contact area between the tooling and the part is designed with a wavy texture to increase the friction between the tooling and the part and ensure that the part does not fall off.

[0056] In the description of this utility model, it should be noted that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0057] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0058] It should be understood that the term "and / or" used in this document is merely a description of the same field in the related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0059] Although the subject matter has been described using language specific to structural features and / or methodological logic, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. Rather, the specific features and actions described above are merely illustrative examples of implementing the claims.

[0060] The above descriptions are merely embodiments of this utility model. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are knowledgeable of all existing technologies in that field, and possess the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in conjunction with their own capabilities. Typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A lifting fixture for quenching ring-shaped parts, characterized in that, It includes a lifting ring, a first base plate, a second base plate, a first set of movable ropes, a second set of movable ropes, and multiple limit blocks; One end of the first set of movable ropes is fixedly installed on the first base plate, and the other end is fixedly installed on the lifting ring. The first set of movable ropes includes multiple first movable ropes, and a first passage space is formed between two adjacent first movable ropes for ring-shaped parts to pass through. One end of the second set of movable ropes is fixedly installed on the second base plate, and the other end is fixedly installed on the lifting ring. The second set of movable ropes includes multiple second movable ropes, and a second passage space is formed between two adjacent second movable ropes for ring-shaped parts to pass through. The first base plate and the second base plate are located on the same horizontal plane. The first base plate and the second base plate are in an open or closed state. A quenching gap is formed between the first base plate and the second base plate. The quenching gap is used for quenching the bottom surface of the ring-shaped parts. Multiple limiting blocks are fixedly installed on both the first base plate and the second base plate. The limiting blocks surround each other to form a flat space for placing the ring-shaped parts. The ring-shaped parts are placed flat on the first base plate and the second base plate. The limiting blocks are respectively close to the edges of the first base plate and the second base plate, and there are clamping gaps between the limiting blocks and the edges of the first base plate and the second base plate; wherein the width of the clamping gap is not less than 50mm and not more than 200mm. The clamping gaps provided by the first and second base plates are used to clamp the first and second base plates into the heat treatment furnace, respectively.

2. The lifting fixture for quenching ring-shaped parts according to claim 1, characterized in that, A semi-circular pull ring is also fixedly installed on one side of the first base plate, and the semi-circular pull ring is close to the clamping gap; a semi-circular pull ring is also fixedly installed on one side of the first base plate, and the semi-circular pull ring is close to the clamping gap; the two semi-circular lifting rings located on different sides of the base plate are symmetrically distributed along the central axis between the first base plate and the second base plate.

3. The lifting fixture for quenching ring-shaped parts according to claim 2, characterized in that, The radius of the semicircular pull ring shall be no less than 50mm and no more than 100mm.

4. The lifting fixture for quenching ring-shaped parts according to claim 1, characterized in that, The first movable rope and the second movable rope are respectively the first wire rope and the second wire rope; the length of the first wire rope and the second wire rope is not more than 5000mm and not less than 2000mm.

5. The lifting fixture for quenching ring-shaped parts according to claim 1, characterized in that, Two limit blocks are installed on each base plate, and the two limit blocks are arranged in a figure-eight shape; a friction block is laid between the two limit blocks.

6. The lifting fixture for quenching ring-shaped parts according to claim 5, characterized in that, The distance between the two limit blocks is 700mm.

7. A lifting fixture for quenching ring-shaped parts according to any one of claims 1, 5, and 6, characterized in that, The height of the limit block shall not be less than 100mm and not more than 300mm.

8. A lifting fixture for quenching ring-shaped parts according to claim 5, characterized in that, The friction block is trapezoidal and is used to conform to the bottom surface contour of ring-shaped parts.

9. A lifting fixture for quenching ring-shaped parts according to claim 1, characterized in that, The area of ​​the quenching gap is 0.4m². 2 It accounts for 70% of the bottom surface area of ​​ring-shaped parts.

10. A lifting fixture for quenching ring-shaped parts according to claim 1, characterized in that, The first base plate and the second base plate are respectively the first steel plate and the second steel plate.

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