A sand blasting tooling for a valve seat housing

Abstract

The embodiment of the present application discloses a sand blasting tool for valve seat shell, which comprises a sand blasting fixing body, a top rod and a cover plate. The sand blasting fixing body comprises a top rod fixing part, a part mounting part with a stepped hole and a connecting part. The top rod fixing part and the part mounting part are both provided in a cylindrical structure and coaxially connected. The connecting part comprises two support rods which are symmetrically arranged to form a door-shaped structure. The top rod passes through the top end of the sand blasting fixing body, and the end of the top rod reaches the position of the stepped hole of the part mounting part. The cover plate is provided in a cylindrical structure with a groove on one end face, and is arranged on the bottom end and the outside of the part mounting part through the groove. The technical scheme provided by the embodiment of the present application solves the problems of the existing sand blasting tool for valve seat shell, such as the rough surface of the non-sand blasting surface of the valve seat shell part, the entry of sand particles into the two airflow holes on the middle boss and the formation of excess materials, etc.

Description

Technical Field

[0001] This invention relates to, but is not limited to, the field of manufacturing technology, and particularly to a sandblasting fixture for a valve seat housing. Background Technology

[0002] Sandblasting is a process that uses the impact of a high-speed stream of sand to clean and roughen the surface of a substrate. For workpieces that require coating, plating, or bonding, sandblasting can remove rust, scale, and other contaminants from the workpiece surface and create a rough surface, greatly improving the adhesion between the workpiece and the coating or plating, resulting in stronger and higher-quality bonding.

[0003] The existing valve seat housing sandblasting fixture has a simple structural design that does not consider the protection of the non-sandblasted surfaces of the valve seat housing parts. Furthermore, the sand spraying range covers the entire end face of the workpiece, causing surface roughness on the non-sandblasted surfaces (specifically the middle boss of the valve seat housing parts). Additionally, sand particles may enter the two airflow holes on the middle boss and become stuck in the airflow holes, resulting in excess material. Summary of the Invention

[0004] The purpose of this invention is to provide a sandblasting fixture for valve seat housings, which solves the problems of existing sandblasting fixtures for valve seat housings, which do not consider the protection of non-sandblasted surfaces of valve seat housing parts, resulting in rough surfaces on non-sandblasted surfaces, and sand particles entering and remaining in the two airflow holes on the intermediate boss, forming excess material.

[0005] The technical solution of this invention is as follows:

[0006] This invention provides a sandblasting fixture for a valve seat housing, comprising: a sandblasting fixing body 1, a top rod 2, and a cover plate 3;

[0007] The sandblasting fixing body 1 includes: a top rod fixing part 11 located at the top and having a central through hole, a part mounting part 12 located at the bottom and having a stepped hole 12a, and a connecting part 13 for connecting the top rod fixing part 11 and the part mounting part 12; wherein, the top rod fixing part 11 and the part mounting part 12 are both configured as cylindrical structures and coaxially connected, and the connecting part 13 includes two support rods symmetrically arranged to form a gate-shaped structure;

[0008] The push rod 2 passes through the top of the sandblasting fixing body 1, and the end of the push rod 2 reaches the position of the stepped hole 12a of the part mounting part 12.

[0009] The cover plate 3 is configured as a cylindrical structure with a groove on one end face, and is covered on the bottom and outside of the part mounting part 12 through its groove.

[0010] Optionally, in the valve seat housing sandblasting fixture described above,

[0011] The top of the stepped hole 12a of the part mounting part 12 in the sandblasting fixing body 1 is provided with an annular shoulder. The part to be sandblasted is inserted into the stepped hole 12a from the lower end of the stepped hole 12a. The top of the part to be sandblasted is limited by the annular shoulder, and the bottom of the part to be sandblasted is limited by the cover plate 3 covering the bottom of the part mounting part 12.

[0012] Optionally, in the valve seat housing sandblasting fixture described above,

[0013] The top rod 2 is configured as a stepped shaft structure, with the diameter of the stepped shaft decreasing from top to bottom. The first stepped shaft 21 at the top of the top rod 2 is used for hand gripping, the second stepped shaft 22 in the middle passes through the sandblasting fixing body 1 and is located in the central through hole of its top rod fixing part 11, and the third stepped shaft 23 at the bottom reaches the part mounting part 12 and abuts against the non-sandblasted end face of the part to be sandblasted, in order to protect the non-sandblasted surface of the part to be sandblasted.

[0014] Optionally, in the valve seat housing sandblasting fixture described above,

[0015] The shaft diameter of the second stepped shaft 22 in the middle of the top rod 2 is configured to be clearance-fitted with the central through hole of the top rod fixing part 11 in the sandblasting fixing body 1.

[0016] Optionally, in the valve seat housing sandblasting fixture described above,

[0017] The stepped hole 12a of the part mounting part 12 in the sandblasting fixing body 1 is configured to be clearance-fitted with the part to be sandblasted installed therein.

[0018] Optionally, in the valve seat housing sandblasting fixture described above,

[0019] The outer circumference of the part mounting part 12 in the sandblasting fixing body 1 and the cover plate 3 covering the outside of it are configured to have a clearance fit.

[0020] Optionally, in the valve seat housing sandblasting fixture described above,

[0021] The part to be sandblasted is a valve seat housing 4. A trapezoidal annular groove 41 and an airflow hole 42 located in the trapezoidal annular groove 41 are provided on the top end face of the valve seat housing 4. The inner wall of the trapezoidal annular groove 41 is the area of ​​the part to be sandblasted.

[0022] The valve seat housing sandblasting fixture is used to install the valve seat housing 4 through the stepped hole 12a of the part mounting part 12 in the sandblasting fixing body 1, and to press the top annular shoulder of the stepped hole 12a of the part mounting part 12 onto the outer periphery of the trapezoidal annular groove 41 at the top of the valve seat housing 4; it is also used to press the end of the push rod 2 onto the middle boss area of ​​the trapezoidal annular groove 41 at the top of the valve seat housing 4, for the purpose of protecting the non-sandblasted surface.

[0023] Optionally, in the valve seat housing sandblasting fixture described above,

[0024] The size of the stepped hole 12a in the part mounting part 12 of the sandblasting fixing body 1 is set according to the size of the parts to be sandblasted of different specifications.

[0025] Sandblasting of different sizes of parts can be performed by changing the sandblasting fixing body 1 and the top rod 2; or, sandblasting of different sizes of parts can be performed by changing the parts mounting part 12 and the top rod 2 in the sandblasting fixing body 1.

[0026] Optionally, in the valve seat housing sandblasting fixture described above,

[0027] The sandblasted fixing body 1, the top rod 2, and the cover plate 3 are all made of wear-resistant alloy steel.

[0028] The beneficial effects of this invention are as follows:

[0029] This invention provides a sandblasting fixture for a valve seat housing. Its main structure includes a sandblasting fixing body 1, a top rod 2, and a cover plate 3. On one hand, a stepped hole 12a in the part mounting portion 12 at the bottom of the sandblasting fixing body 1 is used to limit the size of the part to be sandblasted. The stepped hole 12a can be designed according to the different sizes of the parts to be sandblasted. On the other hand, the third stepped shaft 23 at the end of the top rod 2 can be designed according to the size of the central boss on the non-sandblasted surface of different parts to be sandblasted. Furthermore, the second stepped shaft 22 in the middle section of the top rod 2 can move within the central through hole of the top rod fixing portion 11 of the sandblasting fixing body 1. The bottom end face of the third stepped shaft 23 at the bottom of the top rod 2 is in contact with the central boss on the non-sandblasted surface of the part, thereby protecting the central boss on the non-sandblasted surface of the part. Moreover, by simultaneously replacing the sandblasting fixing body 1 and the top rod 2, or by simultaneously changing the part mounting portion 12 and the top rod 2 in the sandblasting fixing body 1, the sandblasting requirements of parts of different sizes can be adapted. Attached Figure Description

[0030] The accompanying drawings are provided to further understand the technical solutions of the present invention and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of the present invention and do not constitute a limitation on the technical solutions of the present invention.

[0031] Figure 1 A schematic diagram of a sandblasting assembly for a valve seat housing provided in an embodiment of the present invention;

[0032] Figure 2 for Figure 1 The side view of the valve seat housing sandblasting fixture provided in the embodiment shown;

[0033] Figure 3 for Figure 1The illustrated embodiment provides a schematic diagram of the sandblasting fixing body in the valve seat housing sandblasting fixture.

[0034] Figure 4 for Figure 1 The schematic diagram of the top rod in the sandblasting fixture for the valve seat housing provided in the embodiment shown;

[0035] Figure 5 for Figure 1 The schematic diagram of the cover plate in the sandblasting fixture for the valve seat housing provided in the embodiment shown is as follows;

[0036] Figure 6 for Figure 1 The schematic diagram shows the valve seat housing assembled by the sandblasting fixture for the valve seat housing provided in the embodiment shown.

[0037] Figure label:

[0038] 1: Sandblasting to fix the main body;

[0039] 11: Top rod fixing part;

[0040] 12: Parts assembly section;

[0041] 12a: Stepped hole;

[0042] 13: Connecting part;

[0043] 2: Top rod;

[0044] 21: First step axis;

[0045] 22: Second step axis;

[0046] 23: Third step axis;

[0047] 3: Cover plate;

[0048] 4: Valve seat housing;

[0049] 41: Trapezoidal annular groove;

[0050] 42: Airflow hole. Detailed implementation method:

[0051] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

[0052] As explained in the background section, existing valve seat housing sandblasting fixtures do not consider the protection of non-sandblasted surfaces of the valve seat housing parts; therefore, using existing valve seat housing sandblasting fixtures for sandblasting has the following problems:

[0053] On the one hand, because the abrasive particles cover the entire end face of the workpiece, the surface of the non-abrasive surface becomes rough;

[0054] On the other hand, sand particles may enter the two airflow holes on the middle boss and remain in the airflow holes, forming excess material in the airflow holes of the valve seat housing, thereby affecting the normal use of the valve seat housing.

[0055] In view of the above-mentioned problems of existing valve seat housing sandblasting fixtures, the present invention provides a valve seat housing sandblasting fixture that takes into account both clamping and protection of the workpiece to be sandblasted. It can not only protect the non-sandblasted surface of the part, but also be applicable to a variety of parts with different shapes and sizes to be sandblasted.

[0056] The present invention provides the following specific embodiments, which can be combined with each other. For the same or similar concepts or processes, they may not be described again in some embodiments.

[0057] Figure 1 This is a schematic diagram of the sandblasting assembly of a valve seat housing sandblasting fixture provided in an embodiment of the present invention. Figure 2 for Figure 1 The side view of the valve seat housing sandblasting fixture provided in the embodiment shown; Figure 3 for Figure 1 The illustrated embodiment provides a schematic diagram of the sandblasting fixing body in the valve seat housing sandblasting fixture. Figure 5 for Figure 1 The illustrated embodiment provides a schematic diagram of the cover plate in the sandblasting fixture for the valve seat housing. It should be noted that... Figure 1 and Figure 2 The image only shows the cross-section of the part to be sandblasted.

[0058] Reference Figures 1 to 5 As shown, the sandblasting fixture for the valve seat housing provided in this embodiment of the invention includes: a sandblasting fixing body 1, a top rod 2, and a cover plate 3.

[0059] like Figure 3 As shown, the sandblasting fixing body 1 in this embodiment of the invention includes: a top rod fixing part 11 located at the top and having a central through hole, a part mounting part 12 located at the bottom and having a stepped hole 12a, and a connecting part 13 for connecting the top rod fixing part 11 and the part mounting part 12; wherein, the top rod fixing part 11 and the part mounting part 12 are both configured as cylindrical structures and coaxially connected, and the connecting part 13 includes two support rods symmetrically arranged to form a portal structure, referring to... Figure 1 and Figure 2 As shown, the connecting part 13 in the middle section of the sandblasting fixing body 1 facilitates the overall weight reduction of the tooling and also serves to connect the top rod fixing part 11 and the bottom part mounting part 12.

[0060] In this embodiment of the invention, the push rod 2 passes through the top of the sandblasting fixing body 1, and the end of the push rod 2 reaches the position of the stepped hole 12a of the part mounting part 12.

[0061] like Figure 5 As shown, in this embodiment of the invention, the cover plate 3 is configured as a cylindrical structure with a groove on one end face, which covers the bottom and outside of the part mounting part 12 through its groove.

[0062] In specific embodiments of the present invention, such as... Figure 2 As shown, the stepped hole 12a of the part mounting part 12 in the sandblasting fixing body 1 is used to limit the part to be sandblasted. The size of the stepped hole 12a can be set according to the size of different parts to be sandblasted. In an optional embodiment, an annular shoulder is provided at the top of the stepped hole 12a. The part to be sandblasted is inserted into the stepped hole 12a from the lower end of the stepped hole 12a. The top of the part to be sandblasted is limited by the annular shoulder, and the bottom of the part to be sandblasted is limited by the cover plate 3 covering the bottom of the part mounting part 12.

[0063] Figure 4 As shown Figure 1 The illustrated embodiment provides a schematic diagram of the top rod structure in the sandblasting fixture for the valve seat housing. In this embodiment, the top rod 2 is configured as a stepped shaft structure, with the diameter of the stepped shaft decreasing sequentially from top to bottom. The first stepped shaft 21 at the top of the top rod 2 is used for handheld operation, and the second stepped shaft 22 in the middle passes through the sandblasting fixing body 1 and is located in the central through hole of its top rod fixing part 11. Correspondingly, the central through hole of the top rod fixing part 11 matches the shaft diameter of the second stepped shaft 22, and the stability of the top rod 2 is maintained through the central through hole of the top rod fixing part 11. The third stepped shaft 23 at the bottom reaches the part mounting part 12 and abuts against the non-sandblasted end face of the part to be sandblasted, thereby protecting the non-sandblasted surface of the part to be sandblasted.

[0064] In one implementation of this invention, such as Figure 4 As shown, the shaft diameter of the second stepped shaft 22 in the middle of the top rod 2 and the central through hole of the top rod fixing part 11 in the sandblasting fixing body 1 are set to a clearance fit, so as to facilitate the passage of the second stepped shaft 22 of the top rod 2.

[0065] In one implementation of this invention, such as Figure 3 As shown, the stepped hole 12a of the part mounting part 12 in the sandblasting fixing body 1 is configured with a clearance fit with the sandblasting part installed therein, which is used to limit the sandblasting parts of different sizes and specifications.

[0066] In one implementation of this invention, such as Figures 1 to 3 and Figure 5 As shown, the outer circumference of the part mounting part 12 in the sandblasting fixing body 1 and the cover plate 3 covering the outside of it are configured to have a clearance fit.

[0067] Figure 6 for Figure 1 The illustrated embodiment shows a schematic diagram of the valve seat housing assembled by the valve seat housing sandblasting fixture. It should be noted that the valve seat housing sandblasting fixture provided in this embodiment is specifically used for sandblasting valve seat housing parts. The top end face of the valve seat housing 4 is provided with a trapezoidal annular groove 41 and an airflow hole 42 located within the trapezoidal annular groove 41. The inner wall of the trapezoidal annular groove 41 is the area of ​​the part to be sandblasted.

[0068] Using the sandblasting fixture for the valve seat housing provided in this embodiment of the invention, on the one hand, the valve seat housing 4 is installed through the stepped hole 12a of the part mounting part 12 in the sandblasting fixing body 1, and the top annular shoulder of the stepped hole 12a of the part mounting part 12 is pressed against the outer periphery of the trapezoidal annular groove 41 at the top of the valve seat housing 4; on the other hand, the end of the push rod 2 is pressed against the middle boss area of ​​the trapezoidal annular groove 41 at the top of the valve seat housing 4 to protect the non-sandblasted surface.

[0069] It should be further noted that, since the dimensions of the parts to be sandblasted vary, the size of the stepped hole 12a in the part mounting portion 12 of the sandblasting fixing body 1 is set according to the dimensions of the parts to be sandblasted according to different specifications. Optionally, sandblasting of parts to be sandblasted according to different specifications can be performed by changing the sandblasting fixing body 1 and the top rod 2; or, sandblasting of parts to be sandblasted according to different specifications can be performed by changing the part mounting portion 12 and the top rod 2 in the sandblasting fixing body 1.

[0070] In addition, the sandblasting fixing body 1, the top rod 2 and the cover plate 3 in the embodiments of the present invention can all be made of wear-resistant alloy steel.

[0071] The sandblasting fixture for the valve seat housing provided in this embodiment of the invention includes a sandblasting fixing body 1, a top rod 2, and a cover plate 3. On one hand, the stepped hole 12a provided in the part mounting part 12 at the bottom of the sandblasting fixing body 1 is used to limit the part to be sandblasted. The stepped hole 12a can be designed according to the size specifications of different parts to be sandblasted. On the other hand, the third stepped shaft 23 at the end of the top rod 2 can be designed according to the size of the middle boss on the non-sandblasted surface of different parts to be sandblasted. In addition, the second stepped shaft 22 in the middle section of the top rod 2 can move in the central through hole of the top rod fixing part 11 of the sandblasting fixing body 1. The bottom end face of the third stepped shaft 23 at the bottom of the top rod 2 fits against the middle boss on the non-sandblasted surface of the part, thereby protecting the middle boss on the non-sandblasted surface of the part. Furthermore, by replacing the sandblasting fixing body 1 and the top rod 2 at the same time, or by changing the part mounting part 12 and the top rod 2 in the sandblasting fixing body 1 at the same time, the sandblasting requirements of parts of different sizes can be adapted.

[0072] The following detailed implementation example illustrates the specific implementation method of the gate seat housing sandblasting fixture provided in this invention.

[0073] Reference Figures 1 to 6 As shown, this specific embodiment provides a sandblasting fixture for a valve seat housing, including: a sandblasting fixing body 1, a top rod 2, and a cover plate 3.

[0074] The parts to be sandblasted are Figure 6 The valve seat housing 4 shown requires sandblasting of its trapezoidal annular groove 41 to reduce its internal surface roughness, facilitating the vulcanization of rubber inside and thus improving the bonding force between the inner surface of the metal part and the rubber. During sandblasting, the valve seat housing 4 is placed into the stepped hole 12a of the part mounting portion 12 of the sandblasting fixing body 1, ensuring that the sandblasted surface of the valve seat housing 4 faces upwards, i.e., the trapezoidal annular groove 41 faces upwards. Then, a cover plate 3 is used to cover the bottom and periphery of the part mounting portion 12 from bottom to top, ensuring that the valve seat housing 4 does not fall off during sandblasting. Next, a push rod 2 is passed through the central through hole at the top of the sandblasting fixing body 1 from top to bottom, so that the push rod 2 fits against the un-sandblasted boss in the middle of the valve seat housing 4. The sandblasting fixture is then placed upright on the sandblasting equipment for the sandblasting process. This invention can protect the non-sandblasted boss in the middle of the valve seat housing 4 from sandblasting impact. At the same time, by replacing the sandblasting fixing body 1 and the top rod 2 of different sizes, or by replacing the part mounting part 12 and the top rod 2 in the sandblasting fixing body 1 of different sizes, the sandblasting requirements of valve seat housing parts of different sizes can be met.

[0075] In this embodiment of the invention, the raw materials for the sandblasting fixing body 1, the top rod 2, and the cover plate 3 are all made of wear-resistant alloy steel. The base has two narrow sides in the middle forming a door frame connecting the top and bottom, which also facilitates overall weight reduction of the sandblasting fixture.

[0076] While the embodiments disclosed in this invention are as described above, the content is merely for the purpose of facilitating understanding of the invention and is not intended to limit the invention. Any person skilled in the art to which this invention pertains may make any modifications and changes to the form and details of the implementation without departing from the spirit and scope disclosed herein; however, the scope of patent protection of this invention shall still be determined by the scope defined in the appended claims.

Claims

1. A sandblasting tooling for a valve seat housing, characterized in that The sand blasting fixing body (1), the ejector rod (2) and the cover plate (3) are included. The sand blasting fixing body (1) includes: an ejector rod fixing part (11) located at the top and having a central through hole, a part mounting part (12) located at the bottom and having a stepped hole (12a), and a connecting part (13) for connecting the ejector rod fixing part (11) and the part mounting part (12); wherein the ejector rod fixing part (11) and the part mounting part (12) are both provided in a cylindrical structure and coaxially connected, and the connecting part (13) includes two support rods symmetrically arranged to form a door-shaped structure. The ejector rod (2) passes through the top end of the sand blasting fixing body (1), and the end of the ejector rod (2) reaches the position of the stepped hole (12a) of the part mounting part (12). The cover plate (3) is provided in a cylindrical structure with a groove on one side end face, and is covered on the bottom end and the outside of the part mounting part (12) through the groove. The ejector rod (2) is provided in a stepped shaft structure, and the diameters of the stepped shafts from top to bottom decrease in turn. The first stepped shaft (21) at the top of the ejector rod (2) is used for hand holding, the second stepped shaft (22) at the middle of the ejector rod (2) is located in the central through hole of the ejector rod fixing part (11) after passing through the sand blasting fixing body (1), and the third stepped shaft (23) at the bottom of the ejector rod (2) reaches the part mounting part (12) and abuts against the non-sand blasting end face of the part to be sand blasted, so as to protect the non-sand blasting face of the part to be sand blasted. The stepped hole (12a) of the part mounting part (12) in the sand blasting fixing body (1) is provided in a clearance fit with the part to be sand blasted installed therein.

2. The sand blasting tooling for the valve seat shell according to claim 1, wherein The top of the stepped hole (12a) of the part mounting part (12) in the sand blasting fixing body (1) is provided with an annular shoulder, the part to be sand blasted is loaded into the stepped hole (12a) from the lower end of the stepped hole (12a), the top of the part to be sand blasted is limited by the annular shoulder, and the bottom of the part to be sand blasted is limited by the cover plate (3) covered on the bottom of the part mounting part (12).

3. The sand blasting tooling for the valve seat shell according to claim 1, wherein The shaft diameter of the second stepped shaft (22) at the middle of the ejector rod (2) is provided in a clearance fit with the central through hole of the ejector rod fixing part (11) in the sand blasting fixing body (1).

4. The sand blasting tooling for the valve seat shell according to claim 1, wherein The outer circumference of the part mounting part (12) in the sand blasting fixing body (1) is provided in a clearance fit with the cover plate (3) covered on the outside thereof.

5. The sand blasting tooling for the valve seat shell according to any one of claims 1-4, wherein The part to be sand blasted is a valve seat shell (4), the valve seat shell (4) is provided with a trapezoidal ring groove (41) and an airflow hole (42) located in the trapezoidal ring groove (41) on the top end face thereof, and the inner wall of the trapezoidal ring groove (41) is the sand blasting area of the part. ​ The sand blasting tooling of the valve seat shell is used for installing the valve seat shell (4) in the stepped hole (12a) of the part mounting portion (12) of the sand blasting fixing body (1) and making the top annular shoulder of the stepped hole (12a) of the part mounting portion (12) be pressed on the outer periphery of the top trapezoidal ring groove (41) of the valve seat shell (4), and is also used for pressing the end of the ejector pin (2) on the middle boss area of the top trapezoidal ring groove (41) of the valve seat shell (4) to protect the non-sand blasting surface.

6. The sand blasting tooling of the valve seat shell according to claim 5, characterized in that, The size of the stepped hole (12a) of the part mounting portion (12) in the sand blasting fixing body (1) is set according to the size of the different specifications of the parts to be sand blasted; Different specifications of the parts to be sand blasted are sand blasted by changing the sand blasting fixing body (1) and the ejector pin (2), or by changing the part mounting portion (12) in the sand blasting fixing body (1) and the ejector pin (2).

7. The sand blasting tooling of the valve seat shell according to any one of claims 1-4, characterized in that, The sand blasting fixing body (1), the ejector pin (2) and the cover plate (3) are all made of wear-resistant alloy steel.

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