Anti-deformation tooling for heat treatment of raft rack of a raft

Abstract

The utility model relates to metal structure heat treatment technical field, propose a kind of cabin raft raft heat treatment anti-deformation tool, including tool frame body, the top surface of tool frame body is equipped with several array distribution's bolt hole, the top of tool frame body is provided with several connecting seat for placing raft, connecting seat includes first bottom plate, the four corners of first bottom plate are all provided with first fastening bolt, first fastening bolt is passed through first bottom plate and corresponding bolt hole thread cooperation, the top of first bottom plate is fixedly connected with fixed circular tube, the top of fixed circular tube is inserted with movable circular tube, the outside of fixed circular tube is provided with several annular distribution's locating bolt, several locating bolts all are passed through the side wall of fixed circular tube and with movable circular tube thread connection.The utility model makes tooling flexible adaptation raft of different size and structure by modular design, solves the problem that existing fixed tooling cannot cope with raft diversity.

Description

Technical Field

[0001] This utility model relates to the field of heat treatment technology for metal structures, specifically to a heat treatment anti-deformation tooling for cabin raft frames. Background Technology

[0002] In the field of metal structure heat treatment technology, raft frames, as a key marine shock absorption component, are typically manufactured using large welded steel structures. These raft frames are complex, containing multiple protruding supports and cantilever structures, and must withstand high-frequency vibrations and impact loads during service. Therefore, strict requirements are placed on the mechanical properties of the materials (such as strength, toughness, and fatigue life). Heat treatment processes (such as annealing or normalizing) are crucial for improving the uniformity of the internal structure of the raft frame and eliminating residual welding stress. However, during traditional heat treatment, the raft frame is prone to uncontrollable deformation, such as shrinkage, bending, or warping, due to uneven heating and cooling gradients. This can lead to dimensional deviations, decreased assembly accuracy, and even stress concentration, reducing product lifespan.

[0003] In existing technologies, anti-deformation tooling typically employs fixed support structures, such as integral welded frames or simple bolted bases. These solutions have several significant drawbacks:

[0004] First, the size of the raft frame and the position of the protruding support vary depending on the ship type, but the existing tooling is mostly a one-to-one customized design, which cannot flexibly adjust the height or position of the support point. When the raft frame structure changes, the tooling needs to be remade, which increases the cost and time.

[0005] Second, during the heating stage of heat treatment, the coefficient of thermal expansion of the metal is high (e.g., the α value of carbon steel is approximately 13.5 × 10⁻⁶). -6 / ℃), but the existing tooling lacks a real-time compensation mechanism. For example, during the heating process of 300-620℃, the raft frame is prone to lateral bending in the length direction due to uneven thermal expansion, while the cantilever support in the width direction is prone to shrinkage and deformation during cooling. The existing technology relies only on rigid constraints and cannot apply prestress to offset the deformation, resulting in the deformation of the finished product often exceeding the tolerance standard of ±2mm.

[0006] In view of this, this utility model proposes a heat treatment anti-deformation tooling for cabin raft frames. Utility Model Content

[0007] This utility model proposes a heat treatment anti-deformation tooling for raft frames, which solves the problem that existing technologies cannot adapt to various types of raft frame structures.

[0008] The technical solution of this utility model is as follows: A heat treatment anti-deformation fixture for a raft frame includes a fixture frame. The top surface of the fixture frame has several arrayed bolt holes. The top of the fixture frame is provided with several connecting seats for placing the raft frame. Each connecting seat includes a first base plate. Each of the four corners of the first base plate is provided with a first fastening bolt. The first fastening bolt passes through the first base plate and is threaded into the corresponding bolt hole. A fixed round tube is fixedly connected to the top of the first base plate. A movable round tube is inserted into the top of the fixed round tube. Several positioning bolts are arranged in a ring on the outside of the fixed round tube. The positioning bolts all pass through the side wall of the fixed round tube and are threadedly connected to the movable round tube.

[0009] Preferably, the outer side of the movable circular tube is provided with a plurality of positioning holes that are threadedly engaged with the positioning bolts, and the plurality of positioning holes are equidistantly distributed along the axial direction of the movable circular tube.

[0010] Preferably, both ends of the movable circular tube are fixedly connected to limit strips, and the inner wall of the limit strips is provided with limit grooves that fit the limit strips with a clearance.

[0011] Preferably, a number of annularly distributed stiffening plates are fixedly connected to the outer side of the fixed circular tube. The number of stiffening plates is the same as the number of positioning bolts, and the number of positioning bolts is located between two adjacent stiffening plates.

[0012] Preferably, the tooling frame is provided with lifting lugs at its four corners, and all four lifting lugs are welded to the top wall of the tooling frame.

[0013] Preferably, the top of the tooling frame is provided with transverse tension members at both ends along the length of the raft frame, and the top of the tooling frame is provided with longitudinal tension members at both ends along the width of the raft frame.

[0014] Preferably, the transverse tension member includes a second base plate, and each of the four corners of the second base plate is provided with a second fastening bolt. The second fastening bolt passes through the second base plate and is threaded into the corresponding bolt hole. A first lug is fixedly connected to the top of the second base plate. A heat-resistant alloy tie rod is hinged to the inner side of the first lug. The end of the heat-resistant alloy tie rod away from the first lug is connected to the raft support.

[0015] Preferably, the longitudinal tension member includes a third base plate, and each of the four corners of the third base plate is provided with a third fastening bolt. The third fastening bolt passes through the third base plate and is threaded into the corresponding bolt hole. A second lug is fixedly connected to the top of the third base plate, and a heat-resistant hydraulic cylinder is hinged to the inner side of the second lug. The output end of the heat-resistant hydraulic cylinder is connected to the bottom surface of the raft support.

[0016] The working principle and beneficial effects of this utility model are as follows:

[0017] 1. The connecting seat is engaged with the bolt hole of the tooling frame through the first fastening bolt to achieve fine-tuning of position. The movable round tube is engaged with the threaded positioning hole through the positioning bolt to adjust the height equidistantly along the axial direction to ensure that it matches the height of the raft frame protruding support. This solves the problem that the existing fixed tooling cannot cope with the diversity of raft frames. Users can freely adjust according to the number and position of the raft frame protruding support without the need to customize the tooling, thus reducing production costs and cycle time.

[0018] 2. By installing heat-resistant alloy tie rods and heat-resistant hydraulic cylinders on the directions (lateral and longitudinal) where the raft support is prone to shrinkage or bending, the heat-resistant alloy tie rods can apply prestressed tension to the support in the length direction of the raft, and the heat-resistant hydraulic cylinders can apply prestressed pressure to the support in the width direction of the raft, causing the raft to produce a small reverse deformation. During the heat treatment process, thermal expansion will partially offset this prestress, and during cooling and shrinkage, the prestress helps to resist shrinkage deformation, thereby effectively avoiding the problem of deformation of the raft during the heat treatment process. Attached Figure Description

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0020] Figure 1 This is a schematic diagram of the structure of a heat treatment anti-deformation fixture for a raft frame according to the present invention. Figure 1 ;

[0021] Figure 2 This is a schematic diagram of the structure of a heat treatment anti-deformation fixture for a raft frame according to the present invention. Figure 2 ;

[0022] Figure 3 This is a schematic diagram of the structure of the connector of this utility model. Figure 1 ;

[0023] Figure 4 This is a schematic diagram of the structure of the connector of this utility model. Figure 2 ;

[0024] Figure 5 for Figure 4 An enlarged structural diagram of part A;

[0025] Figure 6 This is a structural schematic diagram of the transverse tensioning member of this utility model;

[0026] Figure 7 This is a structural schematic diagram of the transverse tensioning member of this utility model.

[0027] In the diagram: 1. Tooling frame; 2. Bolt holes; 3. Connecting seat; 31. First base plate; 32. First fastening bolt; 33. Fixed round tube; 34. Movable round tube; 35. Positioning bolt; 36. Positioning hole; 37. Reinforcing plate; 38. Limiting strip; 39. Limiting groove; 4. Transverse tension member; 41. Second base plate; 42. Second fastening bolt; 43. First lug; 44. Heat-resistant alloy tie rod; 5. Lifting lug; 6. Longitudinal tension member; 61. Third base plate; 62. Third fastening bolt; 63. Second lug; 64. Heat-resistant hydraulic cylinder. Detailed Implementation

[0028] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0029] Examples, such as Figures 1 to 7 As shown, this embodiment proposes a heat treatment anti-deformation fixture for a raft frame, including a fixture frame 1. Lifting lugs 5 are provided at the four corners of the fixture frame 1, and all four lifting lugs 5 are welded to the top wall of the fixture frame 1. A plurality of arrayed bolt holes 2 are opened on the top surface of the fixture frame 1. A plurality of connecting seats 3 for placing the raft frame are provided on the top of the fixture frame 1. Each connecting seat 3 includes a first base plate 31, and first fastening bolts 32 are provided at the four corners of the first base plate 31. The first fastening bolts 32 penetrate the first base plate 31 and connect to the corresponding... The corresponding bolt holes 2 are threaded. A fixed round tube 33 is fixedly connected to the top of the first base plate 31. A movable round tube 34 is inserted into the top of the fixed round tube 33. Several positioning bolts 35 are arranged in a ring on the outside of the fixed round tube 33. The positioning bolts 35 all penetrate the side wall of the fixed round tube 33 and are threadedly connected to the movable round tube 34. Several positioning holes 36 are opened on the outside of the movable round tube 34, which are threadedly engaged with the positioning bolts 35. The positioning holes 36 are equidistantly distributed along the axial direction of the movable round tube 34.

[0030] The connecting seat 3 is installed by threaded engagement between the first fastening bolt 32 and the bolt hole 2 of the tooling frame 1. This design adopts a detachable structure that allows for flexible adjustment of the position of the connecting seat 3. This allows the installation position to be adjusted according to the position of the protruding support of the raft frame, and it is applicable to various raft frame structure forms.

[0031] By loosening the positioning bolt 35, the movable round tube 34 can move vertically, thus adjusting its height. Then, by tightening the positioning bolt 35, the movable round tube 34 is locked to determine its height. This design can be adjusted according to the height of the protruding support of the raft structure, and is applicable to various raft structures, greatly improving the flexibility of the tooling.

[0032] Furthermore, both ends of the movable circular tube 34 are fixedly connected to limit strips 38, and the inner wall of the limit strips 38 is provided with limit grooves 39 that are clearance-fitted with the limit strips 38.

[0033] The limiting strip 38 can restrict the relative rotation between the movable round tube 34 and the fixed round tube 33, which can prevent the positioning hole 36 and the positioning bolt 35 from shifting. This ensures that the positioning bolt 35 can be accurately aligned with the positioning hole 36 after the height of the movable round tube 34 is adjusted, thereby improving the stability of the overall structure.

[0034] Furthermore, a number of annularly distributed stiffening plates 37 are fixedly connected to the outer side of the fixed circular tube 33. The number of stiffening plates 37 is the same as the number of positioning bolts 35, and the number of positioning bolts 35 is located between two adjacent stiffening plates 37.

[0035] The design of the stiffening plate 37 can improve the compressive strength of the fixed round tube 33, thereby strengthening the support of the fixed round tube 33 for the multi-size raft structure and effectively avoiding the problem of deformation due to insufficient compressive strength of the fixed round tube 33.

[0036] Furthermore, transverse tension members 4 are provided at both ends of the top of the tooling frame 1 along the length direction of the raft frame, and longitudinal tension members 6 are provided at both ends of the top of the tooling frame 1 along the width direction of the raft frame; the transverse tension member 4 includes a second base plate 41, and second fastening bolts 42 are provided at the four corners of the second base plate 41. The second fastening bolts 42 penetrate the second base plate 41 and are threaded into the corresponding bolt holes 2. A first lug 43 is fixedly connected to the top of the second base plate 41, and a wear-resistant material is hinged to the inner side of the first lug 43. The heat-resistant alloy tie rod 44 has one end away from the first lug 43 connected to the raft support; the longitudinal tension member 6 includes a third base plate 61, with third fastening bolts 62 at each of the four corners of the third base plate 61. The third fastening bolts 62 pass through the third base plate 61 and are threaded into the corresponding bolt holes 2. A second lug 63 is fixedly connected to the top of the third base plate 61. A heat-resistant hydraulic cylinder 64 is hinged to the inner side of the second lug 63. The output end of the heat-resistant hydraulic cylinder 64 is connected to the bottom surface of the raft support.

[0037] By installing heat-resistant alloy tie rods 44 and heat-resistant hydraulic cylinders 64 in the directions (lateral and longitudinal) where the raft support is prone to shrinkage or bending, the heat-resistant alloy tie rods 44 can apply prestressed tension to the support in the length direction of the raft, and the heat-resistant hydraulic cylinders 64 can apply prestressed pressure to the support in the width direction of the raft, causing the raft to produce a small reverse deformation. During the heat treatment process, thermal expansion will partially offset this prestress, and during cooling and shrinkage, the prestress helps to resist shrinkage deformation, thereby effectively avoiding the problem of deformation of the raft during the heat treatment process.

[0038] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A heat treatment anti-deformation fixture for a raft frame, comprising a fixture frame (1), characterized in that, The top surface of the tooling frame (1) is provided with a plurality of arrayed bolt holes (2). The top of the tooling frame (1) is provided with a plurality of connecting seats (3) for placing the raft frame. The connecting seat (3) includes a first base plate (31). The four corners of the first base plate (31) are provided with first fastening bolts (32). The first fastening bolts (32) penetrate the first base plate (31) and are threadedly engaged with the corresponding bolt holes (2). The top of the first base plate (31) is fixedly connected with a fixed round tube (33). The top end of the fixed round tube (33) is inserted with a movable round tube (34). The outside of the fixed round tube (33) is provided with a plurality of positioning bolts (35) arranged in a ring. The plurality of positioning bolts (35) penetrate the side wall of the fixed round tube (33) and are threadedly connected with the movable round tube (34).

2. The heat treatment anti-deformation fixture for a raft frame according to claim 1, characterized in that, The movable circular tube (34) has several positioning holes (36) that are threadedly engaged with the positioning bolts (35) on its outer side. The positioning holes (36) are equidistantly distributed along the axial direction of the movable circular tube (34).

3. The heat treatment anti-deformation fixture for a raft frame according to claim 2, characterized in that, Both ends of the movable circular tube (34) are fixedly connected to limit strips (38), and the inner wall of the limit strip (38) is provided with a limit groove (39) that fits the limit strip (38) with a clearance.

4. The heat treatment anti-deformation fixture for a raft frame according to claim 1, characterized in that, The outer side of the fixed circular tube (33) is fixedly connected with a number of annularly distributed stiffening plates (37). The number of stiffening plates (37) is the same as the number of positioning bolts (35), and the number of positioning bolts (35) is located between two adjacent stiffening plates (37).

5. The heat treatment anti-deformation fixture for a raft frame according to claim 1, characterized in that, The tooling frame (1) is provided with lifting lugs (5) at its four corners, and all four lifting lugs (5) are welded to the top wall of the tooling frame (1).

6. The heat treatment anti-deformation fixture for a raft frame according to claim 1, characterized in that, The tooling frame (1) has transverse tension members (4) at both ends along the length of the raft frame, and longitudinal tension members (6) at both ends along the width of the raft frame.

7. The heat treatment anti-deformation fixture for a raft frame according to claim 6, characterized in that, The transverse tension member (4) includes a second base plate (41), and a second fastening bolt (42) is provided at each of the four corners of the second base plate (41). The second fastening bolt (42) passes through the second base plate (41) and is threaded into the corresponding bolt hole (2). A first ear seat (43) is fixedly connected to the top of the second base plate (41). A heat-resistant alloy tie rod (44) is hinged to the inner side of the first ear seat (43). The end of the heat-resistant alloy tie rod (44) away from the first ear seat (43) is connected to the raft support.

8. The heat treatment anti-deformation fixture for a raft frame according to claim 7, characterized in that, The longitudinal tension member (6) includes a third base plate (61), and a third fastening bolt (62) is provided at each of the four corners of the third base plate (61). The third fastening bolt (62) passes through the third base plate (61) and is threaded into the corresponding bolt hole (2). A second ear seat (63) is fixedly connected to the top of the third base plate (61). A heat-resistant hydraulic cylinder (64) is hinged to the inner side of the second ear seat (63). The output end of the heat-resistant hydraulic cylinder (64) is connected to the bottom surface of the raft support.

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