Valve bonnet type casting deformation correction tool and using method thereof

Abstract

The invention discloses a valve bonnet type casting deformation correction tool and a using method thereof, and belongs to the technical field of casting machining correction. A plurality of countersunk head screw holes are symmetrically formed in a base of the correction tool, mounting screws are mounted in the countersunk head screw holes, connecting screw holes used for being in butt joint with the mounting screws are formed in the bottom of a supporting column, and the connecting screw holes are connected with the mounting screws; the supporting columns are symmetrically and vertically arranged on the base, the rotating cushion block is composed of a sleeve and a supporting block, the sleeve is rotatably arranged at the top of the supporting columns in a sleeving mode, the upper plane of the supporting block is used for making contact with a chassis of the bonnet type casting, the upper plane of the pressing block is used for making contact with a press machine, and the lower plane of the pressing block is used for making contact with the center of the chassis of the bonnet type casting. Compared with the prior art, the correcting tool can directly correct a deformation face, when the center of the concave face of the inner cavity of the casting is pressed downwards, three rotating cushion blocks on the periphery can bear counter-acting force upwards, the inner cavity face is corrected to be flat according to the lever principle, and the method is high in correcting efficiency and capable of conducting correction repeatedly without causing product scrapping.

Description

Technical Field

[0001] The present invention relates to the technical field of casting processing correction, and in particular to a valve bonnet type casting deformation correction tool and a use method thereof. Background Art

[0002] Valve bonnet type stainless steel castings are core components of various pipeline transmission system products in the fields of industry, petroleum, chemical industry, etc. Their function is to protect the internal structure of the valve, ensure the normal operation of the valve, and prevent external impurities from entering.

[0003] During the production process of stainless steel bonnet castings, the inner cavity surface often sags due to gravity. If it is not corrected and inspected in time, it will seriously affect the product processing size and cause the product to be scrapped after processing, or after assembly, due to large deformation gaps, it will make it impossible to connect the internal structure of the valve normally.

[0004] In the existing technical solution, since the inner cavity surface is recessed on the chassis of the casting, and the valve bonnet type casting is a cone-like structure with a larger bottom and a smaller top, it cannot be reliably inverted. Technicians usually place the valve bonnet type casting on a press, use the press to directly act on the top plate, and then use the top plate and the inclined plate to transmit the pressure to the chassis for external force correction. Since the above-mentioned "reverse correction solution" does not directly correct the deformed surface, it has technical problems such as low correction efficiency, easy overall deformation, and easy scrapping of the casting.

[0005] Since the valve bonnet casting itself is a special-shaped part and is extremely difficult to fix, how to design a valve bonnet casting deformation correction tool to solve the above technical problems has long troubled technicians in this field. Summary of the Invention

[0006] In response to the above technical problems, the present invention provides a valve bonnet casting deformation correction tool and a method for using the same, which solves the above problems through the following technical means: A valve bonnet type casting deformation correction tool, characterized in that it includes a base, a support column, a rotating pad and a clamping block, wherein: a plurality of countersunk screw holes are symmetrically opened on the base, and mounting screws are installed in the countersunk screw holes; a connecting screw hole for docking mounting screws is opened at the bottom of the support column, and a plurality of support columns are symmetrically and vertically arranged on the base; the rotating pad consists of a sleeve and a support block, and the rotating pad is an L-shaped structure, and the sleeve can be rotatably mounted on the top of the support column, and the upper plane of the support block is used to contact the chassis of the valve bonnet type casting; the upper plane of the clamping block is used to contact the press, and the lower plane of the clamping block is used to contact the center of the chassis of the valve bonnet type casting.

[0007] Preferably, the pressing block is a cylindrical structure, and a positioning head is provided at one end of the cylindrical structure.

[0008] The bonnet casting deformation correction tool includes the following usage methods: Step 1) Place the base in the center of the press table and secure it with a press plate. Step 2) Adjust the angle of the rotating pads on the upper side of the support columns so that the support blocks of the rotating pads are uniformly facing inward, ensuring that one end of the bonnet casting to be corrected can be placed between the multiple support columns and that the base of the bonnet casting is in full contact with the three rotating pads; Step 3) Place the clamping block in the center of the chassis of the bonnet casting; Step 4) Start the press to transfer pressure from the pressing block to the valve bonnet casting, pressing out the concave portion of the bottom surface of the chassis of the valve bonnet casting; Step 5) Use standard blocks for calibration and result checking.

[0009] Preferably, in step 5, a feeler gauge is used to detect the flatness of the bottom surface of the chassis.

[0010] In the above scheme, the valve bonnet type casting includes a bottom plate and a top plate parallel to each other, which are connected by two spaced inclined plates, and an inner cavity is formed between the inclined plates, the bottom plate and the top plate. A bottom cavity is provided on the bottom surface of the bottom plate, a bottom hole is provided in the middle of the bottom cavity, a top hole is provided in the middle of the top plate, a top pipe is connected to the inside of the top hole, side holes connecting to the inner cavity are provided on both sides of the top hole, and a curved hole for connecting to the bottom cavity is provided at the root of the inclined plate.

[0011] The valve bonnet casting deformation correction tool and the use method thereof of the present invention have the following beneficial effects: The base of the correction fixture is symmetrically provided with multiple countersunk screw holes, and mounting screws are installed in the countersunk screw holes, which can flexibly install support columns of different heights. Multiple support columns are symmetrically and vertically arranged on the base. The rotating pad is composed of a sleeve and a support block. The sleeve can be rotatably mounted on the top of the support column. The upper plane of the support block is used to contact the chassis of the valve bonnet type casting, the upper plane of the clamping block is used to contact the press, and the lower plane of the clamping block is used to contact the center of the chassis of the valve bonnet type casting. The angle of the rotating pad can be flexibly adjusted to adapt to castings of different sizes.

[0012] This correction tool can directly correct the deformed surface. When the center of the concave surface of the casting cavity is pressed downward, the three rotating pads on the periphery will be subjected to the reaction force upward, and the inner cavity surface will be corrected and flattened using the lever principle. This method has high correction efficiency and can be corrected repeatedly without causing product scrapping. Since the force acts directly on the correction surface and does not act on other surfaces of the part, the processing accuracy is effectively guaranteed. After batch verification, the deformation can be controlled within 0.5mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for use in the implementation. Obviously, the drawings described below are only some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 It is a schematic diagram of the overall front structure of the present invention; Figure 2 It is a schematic diagram of the overall bottom structure of the present invention; Figure 3 This is a schematic diagram of the installation of the mounting screws of the present invention; Figure 4 This is a schematic diagram of the installation of the rotating pad of the present invention; Figure 5 This is a schematic diagram of the installation of the valve bonnet type casting of the present invention; Figure 6 is a schematic diagram of the rotating pad support of the present invention; Figure 7 This is a schematic diagram of the front structure of the valve bonnet type casting of the present invention; Figure 8 It is a schematic diagram of the bottom surface structure of the valve bonnet type casting of the present invention.

[0015] Among them, 1-base, 101-countersunk screw hole, 2-support column, 3-rotating pad, 301-sleeve, 302-support block, 4-pressing block, 401-positioning head, 5-mounting screw, 6-valve bonnet type casting, 601-chassis, 602-top plate, 603-inclined plate, 604-inner cavity, 605-bottom cavity, 606-bottom hole, 607-top hole, 608-top pipe, 609-side hole, 610-bent hole. DETAILED DESCRIPTION

[0016] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 limiting the present invention. The terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0017] The present invention will be described in detail below with reference to the accompanying drawings.

[0018] like Figures 1 to 8 As shown, the valve bonnet casting deformation correction tool includes a base 1, multiple support columns 2, multiple rotating pads 3 and an independently arranged clamping block 4. The number of support columns 2 and rotating pads 3 is at least three, and can also be four to six. In the figure, the base 1 is symmetrically provided with multiple countersunk screw holes 101, and the three countersunk screw holes 101 are spaced 120 degrees apart. The countersunk screw holes 101 are installed with mounting screws 5. The bottom of the support column 2 is provided with connecting screw holes for docking the mounting screws 5. The multiple support columns 2 are symmetrically and vertically arranged on the base 1. The rotating pad 3 is composed of a sleeve 301 and a support block 302. The rotating pad 3 is an L-shaped structure. The sleeve 301 can be rotatably mounted on the top of the support column 2. The upper surface of the support block 302 is used to contact the bottom plate 601 of the valve bonnet casting 6. The upper surface of the clamping block 4 is used to contact the press, and the lower surface of the clamping block 4 is used to contact the center of the bottom plate 601 of the valve bonnet casting 6.

[0019] In this embodiment, the clamping block 4 is a cylindrical structure, and a positioning head 401 is provided at one end of the cylindrical structure. The height of the clamping block 4 should be 2-3 mm higher than the end face of the casting. The positioning head 401 is used to contact the bottom hole 606, so the two have the same size.

[0020] In specific applications, the bonnet casting deformation correction tool includes the following usage methods: Step 1) Place the base 1 in the center of the press table and secure it with a pressing plate; Step 2) Adjust the angle of the rotating spacers 3 on the upper sides of the support columns 2 so that the support blocks 302 of the rotating spacers 3 face inward uniformly, ensuring that one end of the bonnet casting 6 to be corrected can be placed between the multiple support columns 2 and that the base 601 of the bonnet casting 6 is in full contact with the three rotating spacers 3; Step 3) placing the pressing block 4 at the center of the base plate 601 of the bonnet casting 6; Step 4) Start the press to transfer pressure from the pressing block 4 to the valve bonnet casting 6, pressing out the concave portion of the bottom surface of the chassis 601 of the valve bonnet casting 6; Step 5) Use standard blocks for calibration and result checking.

[0021] Specifically, in step 5, a feeler gauge is used to check the flatness of the bottom surface of chassis 601. A straight standard block is placed on the surface to be tested of the bonnet casting 6, ensuring that the measuring surface of the standard block fits tightly against the bonnet surface. A feeler gauge is used to check the gap between the standard block and the bonnet surface to be tested. The thickness of the feeler gauge inserted represents the straightness error. The straight standard block is moved along the bonnet surface to be tested, measuring at different locations and recording the gap value at each point to determine whether the bonnet surface has been properly calibrated.

[0022] In the above scheme, the valve bonnet casting 6 includes a bottom plate 601 and a top plate 602 parallel to each other, and the bottom plate 601 and the top plate 602 are connected by two spaced inclined plates 603. An inner cavity 604 is formed between the inclined plates 603, the bottom plate 601 and the top plate 602. A bottom cavity 605 is provided on the bottom surface of the bottom plate 601, and a bottom hole 606 is provided in the middle of the bottom cavity 605. A top hole 607 is provided in the middle of the top plate 602. A top pipe 608 is connected to the inside of the top hole 607. Side holes 609 communicating with the inner cavity 604 are provided on both sides of the top hole 607. A curved hole 610 for connecting to the bottom cavity 605 is provided at the root of the inclined plate 603.

[0023] It should be noted that the valve bonnet casting 6 incorporates two spaced-apart inclined plates to expand the internal space of the valve bonnet, allowing for the placement of external drain pipes and electrical wiring, resulting in greater convenience and a neater appearance. Side holes 609 serve to divert external leads, distinguishing input and output lines and preventing wiring errors. Bend hole 610 is connected to an external plug for installation, allowing gas to be fed through the plug into bottom cavity 605, facilitating leak testing during installation.

[0024] In actual operation, the base of the correction fixture is symmetrically provided with multiple countersunk screw holes, in which mounting screws are installed, which can flexibly install support columns of different heights. Multiple support columns are symmetrically and vertically arranged on the base. The rotating pad consists of a sleeve and a support block. The sleeve can be rotatably mounted on the top of the support column. The upper plane of the support block is used to contact the chassis of the valve bonnet type casting, the upper plane of the clamping block is used to contact the press, and the lower plane of the clamping block is used to contact the center of the chassis of the valve bonnet type casting. The angle of the rotating pad can be flexibly adjusted to accommodate castings of different sizes. The correction fixture can directly correct the deformed surface. When the center of the concave surface of the casting cavity is pressed downward, the three rotating pads on the periphery will be subjected to a reaction force upward, and the inner cavity surface is corrected and flattened using the lever principle. This method has high correction efficiency and can be repeatedly corrected without causing product scrapping. Since the force acts directly on the correction surface and does not act on other surfaces of the part, the processing accuracy is effectively guaranteed. After batch verification, the deformation can be controlled within 0.5mm.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A tool for correcting deformation of a bonnet casting, characterized in that: It comprises a base (1), a support column (2), a rotating pad (3) and a pressing block (4), wherein: The base (1) is symmetrically provided with a plurality of countersunk screw holes (101), and mounting screws (5) are installed in the countersunk screw holes (101); The bottom of the support column (2) is provided with a connecting screw hole for docking mounting screws (5), and a plurality of support columns (2) are symmetrically and vertically arranged on the base (1); The rotating pad (3) is composed of a sleeve (301) and a support block (302). The rotating pad (3) is an L-shaped structure. The sleeve (301) is rotatably mounted on the top of the support column (2). The upper surface of the support block (302) is used to contact the chassis (601) of the valve bonnet casting (6). The upper plane of the pressing block (4) is used to contact the press, and the lower plane of the pressing block (4) is used to contact the center of the chassis (601) of the valve bonnet type casting (6).

2. The bonnet casting deformation correction tool according to claim 1, characterized in that: The pressing block (4) is a cylindrical structure, and a positioning head (401) is provided at one end of the cylindrical structure.

3. The bonnet casting deformation correction tool according to claim 1, characterized in that: Including the following usage: Step 1) Place the base (1) in the center of the press table and fix the base (1) with a pressing plate; Step 2) Adjust the angle of the rotating pad (3) on the upper side of the support column (2) so that the support block (302) of the rotating pad (3) is uniformly inward, ensuring that one end of the valve bonnet type casting (6) to be corrected can be placed into the multiple support columns (2), and the base plate (601) of the valve bonnet type casting (6) is fully in contact with the three rotating pads (3); Step 3) placing the pressing block (4) at the center of the chassis (601) of the valve bonnet casting (6); Step 4) starting the press to transmit pressure from the pressing block (4) to the valve bonnet casting (6), thereby pressing out the concave portion of the bottom surface of the chassis (601) of the valve bonnet casting (6); Step 5) Use standard blocks for calibration and result checking.

4. The bonnet casting deformation correction tool according to claim 3, characterized in that: In step 5, a feeler gauge is used to check the flatness of the bottom surface of the chassis (601).

5. The bonnet casting deformation correction tool according to claim 1, characterized in that: The valve bonnet casting (6) includes a bottom plate (601) and a top plate (602) parallel to each other, the bottom plate (601) and the top plate (602) are connected by two spaced inclined plates (603), an inner cavity (604) is formed between the inclined plate (603), the bottom plate (601) and the top plate (602), a bottom cavity (605) is provided on the bottom surface of the bottom plate (601), a bottom hole (606) is provided in the middle of the bottom cavity (605), a top hole (607) is provided in the middle of the top plate (602), a top pipe (608) is connected to the inside of the top hole (607), side holes (609) communicating with the inner cavity (604) are provided on both sides of the top hole (607), and a curved hole (610) for connecting to the bottom cavity (605) is provided at the root of the inclined plate (603).

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