Quenching and tempering tool for long thin-wall pipe fitting
By setting the intermediate support plate in the middle position of the long thin-wall pipe fitting and setting the through-holes on the support plate, the problems of bending and deformation during the conditioning process of the long thin-wall pipe fitting are solved, and a more uniform heat exchange and More efficient quenching process.
Patent Information
- Application Number
- CN202421190124.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-28
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-05-28
AI Technical Summary
Long thin-walled pipe fittings are prone to bending and deformation during tempering. The prior art only supports both ends to effectively control their straightness.
A conditioning tooling including a mandrel, an end support plate, an intermediate support plate and a baffle is designed. By setting an intermediate support plate in the middle position of the pipe fittings and setting through holes on the support plate and baffle, the support plate is ensured. The gap between the inner wall of the pipe fitting is about 50 wires, and the distribution of through holes accounts for 1/3 to 1/4 of the inner hole of the pipe fitting, which improves the straightness of tempering and heat exchange uniformity.
It effectively reduces the amount of tempering deformation, ensures the uniformity of quenching, improves processing efficiency, and reduces cost and processing difficulty.
Smart Images
Figure CN222331988U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of heat treatment technology, and in particular to a quenching and tempering tool for long thin-walled pipe fittings. Background Art
[0002] Heat treatment and tempering is an important basic technology in industrial manufacturing. Heat treatment can fully tap the performance potential of metal materials and extend the service life of products, which is of great significance.
[0003] At present, during the heat treatment and tempering process of pipe fittings, support plates are usually set at both ends of the pipe fittings to support the pipe fittings and axially support the ends of the pipe fittings. The grinding cylinder workpiece is supported internally and the ends are pressed by the two end support plates, which can reduce the deformation of the workpiece during quenching heat treatment.
[0004] However, for long thin-walled pipe fittings (generally referring to pipe fittings with a length greater than 1800mm and a wall thickness less than 15mm), due to the long axial length and thin wall thickness of long thin-walled pipe fittings, it is easy to cause tempering deformation if only the two ends are supported during the tempering process, and the upper and lower ends will bend after tempering. Utility Model Content
[0005] The technical problem to be solved by the utility model is that long thin-walled pipe fittings are prone to deformation during the tempering process, and bending occurs at the upper and lower ends after the tempering.
[0006] To this end, the utility model provides a quenching and tempering tool for long thin-walled pipe fittings.
[0007] The technical solution adopted by the utility model to solve its technical problems is:
[0008] A quenching and tempering tool for long thin-walled pipe fittings, comprising:
[0009] Mandrel, and
[0010] An intermediate support plate, the intermediate support plate is coaxially arranged on the core shaft, the intermediate support plate is located inside the pipe fitting, and the intermediate support plate is supported at the middle position of the pipe fitting;
[0011] An end support plate, the end support plate is coaxially arranged on the core shaft, and the middle support plate supports the end position in the pipe;
[0012] Wherein, the end support plate and the middle support plate are both provided with through holes.
[0013] Furthermore, the total area of the through holes on the end support plate is S2, the total area of the through holes on the middle support plate is S3, and the cross-sectional area of the inner circle of the pipe is S0.
[0014] Furthermore, the outer diameters d of the end support plate and the intermediate support plate are both adapted to the inner diameter D of the pipe fitting, and 50 silk < D - d < 150 silk.
[0015] Furthermore, 80 silk ≤ D - d ≤ 100 silk.
[0016] Furthermore, it further includes a baffle plate. The baffle plate is located on the side of the end support plate away from the intermediate support plate and abuts against the end of the pipe fitting. The baffle plate and the end support plate are connected by a stud, and through holes are also provided on the baffle plate.
[0017] Furthermore, the axial distance H between the baffle plate and the end support plate is 120 - 150 mm.
[0018] Furthermore, a plurality of through holes on the end support plate are circumferentially equidistantly arranged, a plurality of through holes on the intermediate support plate are circumferentially equidistantly arranged, and a plurality of through holes on the baffle plate are circumferentially equidistantly arranged.
[0019] Furthermore, the total area of the through holes on the baffle plate is S1.
[0020] Furthermore, the mandrel is a screw rod, and nuts are provided on both sides of the intermediate support plate and the baffle plate. The intermediate support plate, the baffle plate, and the nuts are all threadedly connected to the screw rod.
[0021] The beneficial effect of the present utility model is that in this application, by arranging an intermediate support plate at the middle position of the pipe fitting, the straightness of the quenching and tempering of the long thin-walled pipe fitting is improved. After quenching and tempering, the pipe fitting is not easy to bend or deform. The gap between the support plate and the inner wall of the pipe fitting is maintained at about 50 silk, controlling the degree of quenching and tempering deformation. The through holes for heat exchange during the quenching and tempering process are evenly distributed on the support plate and the baffle plate, and the proportion of the through holes on the support plate and the baffle plate in the inner hole of the long thin-walled shell is 1 / 3 - 1 / 4. In this way, it is more convenient for heat exchange during the quenching and tempering process, reducing the amount of quenching and tempering deformation, ensuring the uniformity of quenching, and improving the processing efficiency after quenching and tempering. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] The present utility model will be further described below in conjunction with the drawings and embodiments.
[0023] Figure 1 It is a schematic structural diagram of the quenching and tempering tooling for the long thin-walled pipe fitting in the present utility model.
[0024] Figure 2 It is a schematic structural diagram of the through hole in the present utility model.
[0025] In the figure: 1, end support plate; 2, intermediate support plate; 3, baffle plate; 4, screw rod; 5, stud; 6, nut; 7, through hole; 8, lifting lug; 9, pipe fitting. DETAILED DESCRIPTION
[0026] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.
[0027] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.
[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0029] Reference Figure 1 , 2 A tempering tool for long thin-walled pipe fittings includes a support part, a core shaft, a baffle 3 and a locking part. Specifically, the support part includes an end support plate 1 and an intermediate support plate 2. At least two end support plates 1 are provided, and the end support plates 1 are arranged on both sides of the intermediate support plate 2. The end support plates 1 and the intermediate support plates 2 are arranged along the length direction of the core shaft. The axial positions of the end support plates 1 and the intermediate support plates 2 are provided with through holes, and the core shaft passes through the through holes. The core shaft is a screw rod 4. Nuts 6 are provided on both sides of the intermediate support plate 2. The nuts 6 are threadedly connected to the screw rod 4 to install the intermediate support plate 2 on the screw rod 4.
[0030] The locking member is a double-headed stud 5. There are two baffles 3, which are respectively arranged at both ends of the pipe fitting 9. The baffle 3 abuts against the end of the pipe fitting 9. The outer diameter of the baffle 3 is larger than that of the pipe fitting 9. The baffle 3 is located on the side of the end support plate 1 away from the middle support plate 2 and is arranged at an interval from the end support plate 1. The baffle 3 is coaxially sleeved on the screw rod 4. Nuts 6 are also arranged on both sides of each baffle 3, and the nuts 6 are threadedly connected to the screw rod 4. One end of the double-headed stud 5 is threadedly connected to the end support plate 1, and the other end is threadedly connected to the baffle 3.
[0031] In this embodiment, there are two end support plates 1. In other embodiments, there can be three, four or even more end support plates 1. It is preferred that the number of end support plates 1 is an even number. The end support plates 1 are symmetrically arranged between the middle support plate 2 and the baffle 3. Nuts 6 can also be arranged on both sides of the end support plate 1 to fix the end support plate 1 on the screw rod 4 through the nuts 6. The end support plate 1 close to the baffle 3 is connected to the baffle 3 through a locking member. In this embodiment, considering the loss and cost of the tooling during the quenching and tempering process, one end support plate 1 is arranged on each side of the middle support plate 2 to divide the pipe fitting 9 into two quenching and tempering sections with double-headed support. The baffle 3 is arranged at an interval from the end support plate 1 to leave a margin for the axial deformation amount of the pipe fitting 9, thereby improving the quenching and tempering quality.
[0032] Specifically, the length of the double-headed bolt is 150 mm, and the axial distance H between the baffle 3 and the end support plate 1 is 120 - 150 mm, so that at both ends of the pipe fitting 9, the distance from the end support plate 1 to the end face of the pipe fitting 9 is H, thereby controlling the stability of the quenching and tempering deformation amount and ensuring the consistency of the inner hole expansion amount at both ends. The middle support plate 2 is in the middle of the pipe fitting 9, and the two support plates are placed at 120 - 150 mm from both end faces, which can ensure the consistency of the quenching and tempering deformation amount of the part of the pipe fitting 9 between the middle support plate 2 and the end support plate 1.
[0033] It should be noted that the outer diameters d of the end support plate 1 and the middle support plate 2 are both adapted to the inner diameter D of the pipe fitting 9, 50 silk < D - d < 150 silk. In this embodiment, the pipe fitting 9 is supported by 30CrMnSiA material. Preferably, 80 silk ≤ D - d ≤ 100 silk. Through holes 7 are arranged on the end support plate 1, the middle support plate 2 and the baffle 3. A plurality of through holes 7 on the end support plate 1, the middle support plate 2 and the baffle 3 are circumferentially arranged. In this embodiment, four through holes 7 on the end support plate 1, the middle support plate 2 and the baffle 3 are circumferentially equidistantly arranged. The total area of the through holes 7 on each baffle 3 is S1, the total area of the through holes 7 on each end support plate 1 is S2, the total area of the through holes 7 on the middle support plate 2 is S3, and the cross-sectional area of the inner circle of the pipe fitting 9 is S0. ( Figure 2 The small figure a in Figure 2The small figure b in the figure is a schematic diagram of the through hole 7 on the middle support plate 2. Figure 2 The small figure c is a schematic diagram of the through hole 7 on the baffle 3).
[0034] The implementation principle of this application is:
[0035] First, install the middle support plate 2 in the middle position of the screw rod 4, and tighten and fix it to the screw rod 4 through the nuts 6 on both sides of the middle support plate 2, and then install the two end support plates 1 at the two ends of the screw rod 4, and insert the middle support plate 2 and the end support plate 1 into the interior of the long thin-walled shell. The specific position is fixed by a 150mm stud 5, one end of the stud 5 is screwed on the end support plate 1, and the other end is screwed on the baffles 3 at both ends of the long thin-walled shell, and then the end support plate 1 is tightened and fixed with nuts 6, and then the baffles 3 on the two end surfaces are also tightened and fixed with nuts 6, and the baffle 3 on the lower end surface is tightened with two nuts 6 to play a role in bearing weight and preventing loosening, and finally the lifting ear 8 is screwed on the upper end of the screw rod 4.
[0036] The present application improves the straightness of the long thin-walled pipe 9 during tempering by arranging an intermediate support plate 2 at the middle position of the pipe 9. After tempering, the pipe 9 is not easy to bend or deform. The gap between the support plate and the inner wall of the pipe 9 is maintained at about 50 threads to control the degree of deformation during tempering. The through holes 7 used for heat exchange during the tempering process are evenly distributed on the support plate and the baffle 3, and the proportion of the through holes 7 on the support plate and the baffle 3 is 1 / 3 to 1 / 4 of the inner hole of the long thin-walled shell. This makes it easier to exchange heat during the tempering process, reduces the amount of tempering deformation, ensures the uniformity of quenching, and improves the processing efficiency after tempering.
[0037] In summary, the present application solves the problem of large deformation after quenching and tempering, controls the deformation and straightness of the long thin-walled shell after quenching and tempering, and reduces the difficulty of processing after quenching and tempering. It also improves the uniformity of quenching of the long thin-walled shell, reduces the processing allowance after quenching and tempering, reduces the cost of raw materials, quenching and tempering, and improves processing efficiency.
[0038] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without departing from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.
Claims
1. A quenching and tempering tool for long thin-walled pipe fittings, characterized in that: including, a mandrel, and an intermediate support plate (2), the intermediate support plate (2) is coaxially arranged on the mandrel, the intermediate support plate (2) is located inside the pipe fitting (9), and the intermediate support plate (2) supports at the middle position of the pipe fitting (9); an end support plate (1), the end support plate (1) is coaxially arranged on the mandrel, and the intermediate support plate (2) supports at the end position inside the pipe fitting (9); wherein, through holes (7) are arranged on both the end support plate (1) and the intermediate support plate (2).
2. The quenching and tempering tooling for long thin-walled pipes according to claim 1 is characterized in that: The total area of the through holes (7) on the end support plate (1) is S2, the total area of the through holes (7) on the middle support plate (2) is S3, and the cross-sectional area of the inner circle of the pipe (9) is 3. The quenching and tempering tooling for long thin-walled pipes according to claim 1 is characterized in that: The outer diameters d of the end support plate (1) and the intermediate support plate (2) are both adapted to the inner diameter D of the pipe fitting (9), and 50 silk < D - d < 150 silk.
4. The quenching and tempering tooling for long thin-walled pipes according to claim 3 is characterized in that: 80 silk ≤ D - d ≤ 100 silk.
5. The quenching and tempering tooling for long thin-walled pipes according to claim 2, characterized in that: It further includes a baffle plate (3), the baffle plate (3) is located on the side of the end support plate (1) away from the intermediate support plate (2) and abuts against the end of the pipe fitting (9), the baffle plate (3) is connected to the end support plate (1) through a stud (5), and through holes (7) are also arranged on the baffle plate (3).
6. The quenching and tempering tooling for long thin-walled pipes according to claim 5, characterized in that: The axial distance H between the baffle plate (3) and the end support plate (1) is 120 - 150 mm.
7. The quenching and tempering tooling for long thin-walled pipes according to claim 5, characterized in that: A plurality of through holes (7) on the end support plate (1) are circumferentially equidistantly arranged, a plurality of through holes (7) on the intermediate support plate (2) are circumferentially equidistantly arranged, and a plurality of through holes (7) on the baffle plate (3) are circumferentially equidistantly arranged.
8. The quenching and tempering tooling for long thin-walled pipes according to claim 7, characterized in that: The total area of the through holes (7) on the baffle (3) is S1, 9. The quenching and tempering tooling for long thin-walled pipes according to claim 5, characterized in that: The mandrel is a screw rod (4), nuts (6) are arranged on both sides of the intermediate support plate (2) and the baffle plate (3), and the intermediate support plate (2), the baffle plate (3), and the nuts (6) are all threadedly connected to the screw rod (4).