A positioning device for casting a cast steel piece of a steam turbine

Abstract

The utility model relates to steam turbine technical field provides a kind of positioning device for steam turbine steel casting, including base, the upper slide of base is connected with sliding plate, the upper fixed connection of sliding plate is positioned with platform, the side of positioned platform is provided with positioning plate, the upper of positioned platform is provided with mould, the upper of mould is provided with main positioning rod, the side of mould is provided with auxiliary positioning rod, the side of auxiliary positioning rod is provided with rotating plate, the end of rotating plate away from auxiliary positioning rod is rotatably connected with base, the side of mould away from auxiliary positioning rod is provided with pipe insertion;The utility model is clamped mould from side by positioned platform and positioning plate, combine main positioning rod and adapt complex shape from the top of mould and be compressed, cooperate auxiliary positioning rod to form three-dimensional positioning system of side, top, oblique top direction, avoid the deviation caused by single direction clamping sliding.

Description

Technical Field

[0001] This utility model relates to the field of steam turbine technology, specifically a positioning device for casting steam turbine cast steel parts. Background Technology

[0002] Steam turbine cast steel parts refer to key steam turbine components manufactured using cast steel materials (iron-carbon alloys with a carbon content of generally 0.1% to 0.6%, possessing high strength, good toughness, and wear resistance) through casting processes (such as sand casting and investment casting). In the casting process, positioning refers to ensuring the precise spatial position of components such as sand molds (or molds), cores, and gating gates through technological means. Its core purpose is to guarantee the dimensional accuracy, internal quality, and production stability of the castings.

[0003] Chinese patent application number CN202322818803.5 discloses a positioning device for casting steam turbine steel parts, comprising: a base, a support frame mounted on the top of the base, a support platform mounted on the top of one side of the support frame, a rear pad block mounted on the top of the support platform, and a front pad block mounted on the top of the support platform, the front and rear pad blocks serving as limiting supports; a casting frame mounted on the top of the support frame; and a movable shaft mounted on the bottom of the casting frame, both ends of which are fitted with movable sleeves, which are fixedly connected to the support frame, thus providing structural support. This invention not only enables convenient rotary adjustment and positioning for casting steam turbine steel parts, facilitating multi-position rotary adjustment control, but also improves the convenience of unloading steam turbine steel parts.

[0004] However, existing technology can only be used for simple positioning of the upper and lower mold bases. Steam turbine cast steel parts often contain structures with multiple curved surfaces, deep cavities, and uneven thickness. The upper and lower mold fitting (parting surface positioning) can only control the alignment of the casting in the direction perpendicular to the parting surface (usually the height direction). However, the dimensional accuracy problems of complex cast steel parts may occur in the horizontal direction (such as radial or circumferential) or in three-dimensional space. Parting surface positioning alone cannot solve these problems, which in turn leads to the offset of the core (such as steam flow channels, cooling channels, etc.), changes the internal structure of the casting (such as uneven wall thickness, flow channel blockage, etc.), and affects the performance of the steam turbine.

[0005] In summary, this utility model provides a positioning device for casting steam turbine cast steel parts to solve the above problems. Utility Model Content

[0006] This utility model provides a positioning device for casting steam turbine cast steel parts, which solves the problem of positioning deviation in the prior art by combining and positioning the cast steel parts.

[0007] The specific technical solution of this utility model is as follows:

[0008] A positioning device for casting steam turbine steel parts includes a base, a sliding plate slidably connected above the base, a positioning platform fixedly connected above the sliding plate, a positioning plate on one side of the positioning platform, a mold above the positioning platform, a main positioning rod above the mold, an auxiliary positioning rod on one side of the mold, a rotating plate on the side of the auxiliary positioning rod, the end of the rotating plate away from the auxiliary positioning rod being rotatably connected to the base, an insertion tube on the side of the mold away from the auxiliary positioning rod, and a positioning clamp on the side of the insertion tube away from the mold.

[0009] In this invention, a sliding plate is used to adjust the position of the positioning platform; the positioning platform and positioning plate are used to clamp the positioning mold from the side; the main positioning rod is used to press the positioning mold from above, and can also be used to mount other molds for splicing; the auxiliary positioning rod is used to press the mold from an obliquely upward position; the rotating plate is used to adjust the position of the auxiliary positioning rod; the insert tube is used to insert into the mold for internal auxiliary positioning; the main positioning rod and auxiliary positioning rod can be telescopic rods commonly used in the prior art; the positioning clamp can be clamps commonly used in the prior art, used to clamp different types of insert tubes, and can also be used to clamp molds with long tubes, thereby assisting in positioning; this invention is mainly aimed at curved, porous cast steel parts, which are difficult to clamp and position in a single direction, and the through holes and pipes cannot be accurately positioned by clamping alone. Therefore, positioning is performed from the side, top, and obliquely upward positions, and insert tubes are used to insert through holes and pipes for internal auxiliary positioning, in order to solve the problem of positioning deviations in the prior art.

[0010] In a preferred embodiment, a driving cylinder is provided on the side of the sliding plate, and the output end of the driving cylinder is connected to the sliding plate.

[0011] In this invention, the drive cylinder is used to move the sliding plate relative to the base, thereby adjusting the position of the positioning platform and aligning it with components such as the main positioning rod.

[0012] In a preferred embodiment, a first movable plate is fixedly connected to the side of the main positioning rod, a second movable plate is slidably connected to the side of the first movable plate away from the main positioning rod, the side of the second movable plate away from the first movable plate is slidably connected to the base, a first servo cylinder is disposed above the first movable plate, the output end of the first servo cylinder is connected to the first movable plate, and a second servo cylinder is disposed on one side of the second movable plate, the output end of the second servo cylinder is connected to the second movable plate.

[0013] In this invention, the first moving plate and the first servo cylinder are used to adjust the height of the main positioning rod, and the second moving plate and the second servo cylinder are used to adjust the horizontal position of the main positioning rod, so that the main positioning rod has a certain degree of flexibility and can adapt to the complex shape of the cast steel part.

[0014] In a preferred embodiment, a drive platform is provided on one side of the positioning fixture, and a mounting base is rotatably connected to the side of the drive platform.

[0015] In this invention, the drive platform is used to control the clamping of the positioning fixture, and the drive platform itself can also rotate relative to the mounting base to adjust the position of the insertion tube.

[0016] In a preferred embodiment, a first extension rod is detachably connected to the top of the drive platform, a first clamping plate is slidably connected to the side of the first extension rod, a second extension rod is slidably connected to the end of the first clamping plate away from the first extension rod, and a second clamping plate is slidably connected to the side of the second extension rod.

[0017] In this invention, the first extension rod, the first clamping plate, the second extension rod, and the second clamping plate cooperate with each other, which is equivalent to adding a simple auxiliary clamp next to the positioning clamp. The small insertion tube can be clamped on the inner side of the second clamping plate and inserted into the mold for auxiliary positioning, thereby further improving the positioning accuracy.

[0018] In a preferred embodiment, the positioning clamp is slidably connected to a clamping block on the side of the insertion tube.

[0019] In this invention, the positioning clamp uses three clamping blocks to clamp the insertion tube, thereby fixing the insertion tube at the center of the positioning clamp.

[0020] In a preferred embodiment, an operation panel is provided on the side of the mounting base.

[0021] In this invention, the control panel is used to control the working status of the device.

[0022] In a preferred embodiment, an operating lever is provided on the side of the positioning plate away from the mold, and the side of the operating lever is slidably connected to the positioning table.

[0023] In this invention, the operating lever is used to push the positioning plate to slide relative to the positioning table, thereby clamping the mold between the positioning plate and the positioning table.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. This utility model uses a positioning table and positioning plate to clamp the mold from the side, and a main positioning rod to press the mold from above and adapt to complex shapes. With the help of auxiliary positioning rods, a three-dimensional positioning system is formed in three directions: side, top, and oblique top, avoiding slippage or deviation caused by clamping in one direction.

[0026] 2. This utility model uses a tube inserted into the through hole of the mold or inside the pipe for auxiliary positioning, and uses a positioning clamp to fix the tube, which enhances the positioning accuracy of the internal structure of the cast steel part, and is especially suitable for cast steel parts with long pipes or multiple holes. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0028] Figure 2 This is a schematic diagram of the rotating plate of this utility model.

[0029] Figure 3 This is a schematic diagram of the first movable plate of this utility model.

[0030] Figure 4 This is a schematic diagram of the positioning fixture of this utility model.

[0031] Figure 5 This is a schematic diagram of the clamping block of this utility model.

[0032] The attached figures are labeled as follows: 1. Base; 2. Sliding plate; 21. Drive cylinder; 3. Positioning platform; 31. Positioning plate; 4. Mold; 5. Main positioning rod; 51. First moving plate; 52. Second moving plate; 53. First servo cylinder; 54. Second servo cylinder; 6. Auxiliary positioning rod; 61. Rotating plate; 7. Positioning fixture; 71. Insertion tube; 72. Drive platform; 73. Mounting base; 74. First extension rod; 75. First clamping plate; 76. Second extension rod; 77. Second clamping plate; 78. Clamping block; 79. Operation panel; 32. Operation lever. Detailed Implementation

[0033] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0034] like Figure 1-5 As shown, this utility model provides a positioning device for casting steam turbine cast steel parts, including a base 1, a sliding plate 2 slidably connected above the base 1, a positioning platform 3 fixedly connected above the sliding plate 2, a positioning plate 31 provided on one side of the positioning platform 3, a mold 4 provided above the positioning platform 3, a main positioning rod 5 provided above the mold 4, an auxiliary positioning rod 6 provided on one side of the mold 4, a rotating plate 61 provided on the side of the auxiliary positioning rod 6, the end of the rotating plate 61 away from the auxiliary positioning rod 6 being rotatably connected to the base 1, an insertion tube 71 provided on the side of the mold 4 away from the auxiliary positioning rod 6, and a positioning clamp 7 provided on the side of the insertion tube 71 away from the mold 4.

[0035] A drive cylinder 21 is provided on the side of the sliding plate 2, and the output end of the drive cylinder 21 is connected to the sliding plate 2.

[0036] A first movable plate 51 is fixedly connected to the side of the main positioning rod 5. A second movable plate 52 is slidably connected to the side of the first movable plate 51 away from the main positioning rod 5. The side of the second movable plate 52 away from the first movable plate 51 is slidably connected to the base 1. A first servo cylinder 53 is provided above the first movable plate 51. The output end of the first servo cylinder 53 is connected to the first movable plate 51. A second servo cylinder 54 is provided on one side of the second movable plate 52. The output end of the second servo cylinder 54 is connected to the second movable plate 52.

[0037] A drive platform 72 is provided on one side of the positioning fixture 7, and a mounting base 73 is rotatably connected to the side of the drive platform 72.

[0038] A first extension rod 74 is detachably connected to the top of the drive platform 72. A first clamping plate 75 is slidably connected to the side of the first extension rod 74. A second extension rod 76 is slidably connected to the end of the first clamping plate 75 away from the first extension rod 74. A second clamping plate 77 is slidably connected to the side of the second extension rod 76.

[0039] A clamping block 78 is slidably connected to the side of the positioning clamp 7 near the insertion tube 71.

[0040] An operation panel 79 is provided on the side of the mounting base 73.

[0041] An operating lever 32 is provided on the side of the positioning plate 31 away from the mold 4, and the side of the operating lever 32 is slidably connected to the positioning table 3.

[0042] The working principle of this utility model is as follows: When the worker positions the mold 4, he first places the mold 4 on the positioning table 3 so that the side of the mold 4 fits against the positioning table 3; then he pushes the operating rod 32, and the operating rod 32 drives the positioning plate 31 to slide along the positioning table 3 until the positioning plate 31 is in close contact with the other side of the mold 4. The horizontal position of the mold 4 is initially fixed by the bidirectional clamping of the side, forming the basic positioning.

[0043] When it is necessary to adjust the relative position of the positioning platform 3 with the main positioning rod 5 and the auxiliary positioning rod 6, the drive cylinder 21 is activated, pushing the sliding plate 2 to slide horizontally on the base 1, thereby moving the positioning platform 3 and the mold 4 as a whole until the mold 4 is aligned with the main positioning rod 5 above and the auxiliary positioning rod 6 on the side.

[0044] Then, the second servo cylinder 54 drives the second moving plate 52 to slide on the base 1, causing the first moving plate 51 and the main positioning rod 5 to move laterally, aligning the main positioning rod 5 with the target position above the mold 4. The first servo cylinder 53 drives the first moving plate 51 to rise and fall vertically, causing the main positioning rod 5 to press down onto the top surface of the mold 4, fixing the vertical position of the mold 4 by vertical clamping from above. The main positioning rod 5 can also be adjusted via dual axes to conform to the curved surface contour or serve as a splicing fulcrum, enhancing positioning flexibility.

[0045] Subsequently, the rotating plate 61 rotates around the base 1 as a fulcrum, causing the auxiliary positioning rod 6 to adjust its tilt angle, so that the auxiliary positioning rod 6 presses the side of the mold 4 from the upper side of the mold 4, forming a three-dimensional positioning system with the main positioning rod 5 and the positioning table 3 from the side, top, and upper side, preventing the mold 4 from shifting or flipping when subjected to force in a single direction.

[0046] Insert the insertion tube 71 into the through hole or pipe of the mold 4, with the other end extending into the positioning fixture 7. The drive table 72 controls the clamping block 78 to slide along the positioning fixture 7. Through the synchronous contraction of the three clamping blocks 78, the insertion tube 71 is fixed at the central axis of the positioning fixture 7, ensuring that the insertion tube 71 is coaxial with the internal structure of the mold 4.

[0047] The drive table 72 can rotate around the mounting base 73, driving the insertion tube 71 to adjust its direction to adapt to through holes or pipes of different angles on the mold 4. If it is necessary to fix the auxiliary tube, a first extension rod 74 can be installed above the drive table 72. By sliding the first clamping plate 75 and the second extension rod 76, the second clamping plate 77 can clamp the auxiliary tube and insert it into the small hole of the mold 4 to achieve multi-level precision positioning.

[0048] The embodiments of this utility model are given for the purpose of illustration and description. Although embodiments of this utility model have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this utility model. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this utility model.

Claims

1. A positioning device for casting steam turbine cast steel parts, characterized in that: The system includes a base (1), a sliding plate (2) slidably connected above the base (1), a positioning platform (3) fixedly connected above the sliding plate (2), a positioning plate (31) provided on one side of the positioning platform (3), a mold (4) provided above the positioning platform (3), a main positioning rod (5) provided above the mold (4), an auxiliary positioning rod (6) provided on one side of the mold (4), a rotating plate (61) provided on the side of the auxiliary positioning rod (6), a rotating plate (61) rotatably connected to the base (1) at one end of the rotating plate (61) away from the auxiliary positioning rod (6), an insertion tube (71) provided on the side of the mold (4) away from the auxiliary positioning rod (6), and a positioning clamp (7) provided on the side of the insertion tube (71) away from the mold (4).

2. The positioning device for casting steam turbine cast steel parts according to claim 1, characterized in that: A drive cylinder (21) is provided on the side of the sliding plate (2), and the output end of the drive cylinder (21) is connected to the sliding plate (2).

3. The positioning device for casting steam turbine cast steel parts according to claim 1, characterized in that: A first movable plate (51) is fixedly connected to the side of the main positioning rod (5). A second movable plate (52) is slidably connected to the side of the first movable plate (51) away from the main positioning rod (5). The side of the second movable plate (52) away from the first movable plate (51) is slidably connected to the base (1). A first servo cylinder (53) is provided above the first movable plate (51). The output end of the first servo cylinder (53) is connected to the first movable plate (51). A second servo cylinder (54) is provided on one side of the second movable plate (52). The output end of the second servo cylinder (54) is connected to the second movable plate (52).

4. A positioning device for casting steam turbine cast steel parts according to claim 1, characterized in that: A drive platform (72) is provided on one side of the positioning fixture (7), and a mounting base (73) is rotatably connected to the side of the drive platform (72).

5. A positioning device for casting steam turbine cast steel parts according to claim 4, characterized in that: A first extension rod (74) is detachably connected to the top of the drive platform (72). A first clamping plate (75) is slidably connected to the side of the first extension rod (74). A second extension rod (76) is slidably connected to the end of the first clamping plate (75) away from the first extension rod (74). A second clamping plate (77) is slidably connected to the side of the second extension rod (76).

6. A positioning device for casting steam turbine steel parts according to claim 1, characterized in that: The positioning clamp (7) has a clamping block (78) slidably connected to the side of the insertion tube (71).

7. A positioning device for casting steam turbine cast steel parts according to claim 4, characterized in that: An operation panel (79) is provided on the side of the mounting base (73).

8. A positioning device for casting steam turbine cast steel parts according to claim 1, characterized in that: An operating lever (32) is provided on the side of the positioning plate (31) away from the mold (4), and the side of the operating lever (32) is slidably connected to the positioning table (3).

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