Valve disc hemisphere grinding tool

Abstract

This utility model discloses a valve disc hemispherical grinding fixture, relating to the field of grinding equipment. It includes a drilling machine, a fixed fixture, and a grinding fixture. The fixed fixture is mounted on the drilling machine's worktable and includes a base and two sets of positioning components. The two sets of positioning components are positioned opposite each other on the top surface of the base for fixing both ends of the valve disc. The grinding fixture is connected to the drilling machine's spindle and includes a connecting frame and a grinding ring. One end of the connecting frame is connected to the spindle, and the other end is connected to the grinding ring. A grinding strip is provided on the side of the grinding ring facing the hemispherical surface, and the grinding strip is used to grind the hemispherical surface. This application replaces manual grinding with mechanical grinding, saving the high cost of specialized equipment. It utilizes an existing idle drilling machine to achieve rapid grinding, stably installs the valve disc, improves grinding efficiency, and ensures grinding quality.

Description

Technical Field

[0001] This utility model relates to the field of grinding equipment, and more specifically, to a grinding fixture for a valve disc hemispherical surface. Background Technology

[0002] A hemispherical valve is a valve whose opening and closing element is a hemisphere, driven by a valve stem and rotating around the axis of the valve stem. The hemispherical surface requires high wear and corrosion resistance, and a high degree of surface smoothness. Currently, hemispherical surfaces are processed by manual grinding, which results in low grinding precision and efficiency.

[0003] As industrial manufacturing demands ever higher precision and surface quality for parts, traditional grinding methods are no longer sufficient to meet the needs of modern production. Utility Model Content

[0004] The purpose of this utility model is to provide a valve disc hemispherical grinding fixture, which replaces manual grinding with mechanical grinding, saves the high cost of special equipment, and can achieve rapid grinding using existing idle drilling machines. It can also stably install the valve disc, improve grinding efficiency, and ensure grinding quality.

[0005] The embodiments of this utility model are implemented as follows:

[0006] This application provides a valve disc hemispherical grinding fixture, including a drilling machine, a fixed fixture, and a grinding fixture.

[0007] The fixing fixture is set on the worktable of the drilling machine and includes a base and two sets of positioning components; the two sets of positioning components are arranged opposite to each other on the top surface of the base and are used to fix the two ends of the valve disc.

[0008] The grinding fixture is connected to the spindle of the drilling machine and includes a connecting frame and a grinding ring; one end of the connecting frame is connected to the spindle, and the other end of the connecting frame is connected to the grinding ring; a grinding strip is provided on the side of the grinding ring facing the hemisphere, and the grinding strip is used to grind the hemisphere.

[0009] Furthermore, based on the aforementioned solution, the positioning component includes two opposing diagonal braces and a baffle disposed between the two diagonal braces.

[0010] The two diagonal braces are integrally connected to the base, and the relative inclined surfaces of the two diagonal braces form a clamping effect on both ends of the valve disc;

[0011] The baffle is integrally connected to the two diagonal braces and is located on the side of the two diagonal braces near the center of the base; when the valve disc is installed, the baffle is located inside the valve disc and abuts against the valve disc.

[0012] Furthermore, based on the aforementioned scheme, the top of the baffle is arc-shaped, and the two opposing baffles are provided with axially penetrating through holes.

[0013] Furthermore, based on the aforementioned scheme, the outer side of the diagonal brace is fixedly connected to the base via a triangular rib plate.

[0014] Furthermore, based on the aforementioned solution, the connecting frame includes a fixing member, a connecting shaft, and multiple connecting rods.

[0015] The plurality of connecting rods are arranged in an umbrella shape around the periphery of the fixing member, and the distal ends of the plurality of connecting rods are respectively fixedly connected to the top surface of the grinding ring;

[0016] The connecting shaft is disposed at the end of one of the connecting rods near the fixing member and is connected to the fixing member. The connecting shaft is used to connect to the main shaft.

[0017] Furthermore, based on the aforementioned solution, the fixing component includes a ball shaft and a sleeve. One end of the ball shaft is provided with a ball head, which is movably disposed inside the sleeve. The other end of the ball shaft is connected to the connecting shaft. The plurality of connecting rods are connected to the periphery of the sleeve.

[0018] Furthermore, based on the aforementioned scheme, the grinding ring has an inclined surface on the side facing the hemisphere, and the grinding strip is disposed on the inclined surface, with the side of the grinding strip facing the hemisphere adapted to the shape of the hemisphere.

[0019] Furthermore, based on the aforementioned scheme, the grinding strip is a honing oilstone strip.

[0020] Furthermore, based on the aforementioned scheme, the length of the grinding strip is greater than the length of the inclined surface of the grinding ring.

[0021] Compared with the prior art, the embodiments of this utility model have at least the following advantages or beneficial effects:

[0022] This application utilizes a fixed fixture, including a base and two sets of positioning components. These components are positioned opposite each other on the top surface of the base to secure both ends of the valve disc, ensuring stable installation of the valve disc on the base and preventing displacement during grinding or machining errors due to vibration. A grinding fixture, including a connecting frame and a grinding ring, is also included. The grinding ring is mounted on the connecting frame, with a grinding strip positioned on the side of the grinding ring facing the hemisphere for grinding against it. By mounting the base on the worktable of an existing drilling machine and connecting the connecting frame to the drilling machine's spindle, which rotates at a set speed, the grinding fixture moves relative to the valve disc surface. By adjusting the drilling machine's speed and feed rate, the grinding depth and effect can be precisely controlled, achieving efficient machining of the valve disc's spherical surface. This application replaces manual grinding with mechanical grinding, eliminating the high cost of specialized equipment. It utilizes existing idle drilling machines to achieve rapid grinding, stably install the valve disc, improve grinding efficiency, and ensure grinding quality. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a cross-sectional view of the overall structure of the valve disc hemispherical grinding fixture according to an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of the fixing fixture and the grinding fixture in an embodiment of this utility model;

[0026] Figure 3 This is a cross-sectional view of the grinding fixture according to an embodiment of the present invention.

[0027] Icons: 1-Drilling machine, 11-Spindle, 2-Fixing fixture, 21-Base, 22-Positioning component, 221-Diagonal brace, 222-Baffle, 223-Triangular rib, 3-Grinding fixture, 31-Connecting frame, 311-Fixing component, 3111-Ball shaft, 3112-Sleeve, 312-Connecting shaft, 313-Connecting rod, 32-Grinding ring, 33-Grinding strip, 4-Valve disc. Detailed Implementation

[0028] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0029] Please refer to Figures 1-3 The figure shown is a schematic diagram of the overall structure of the valve disc hemispherical grinding fixture.

[0030] This embodiment provides a valve disc hemispherical grinding fixture, including a drilling machine 1, a fixed fixture 2, and a grinding fixture 3.

[0031] The fixing fixture 2 is set on the worktable of the drilling machine 1, including a base 21 and two sets of positioning components 22; the two sets of positioning components 22 are arranged opposite to each other on the top surface of the base 21 for fixing the two ends of the valve disc 4.

[0032] The grinding fixture 3 is connected to the spindle 11 of the drilling machine 1 and includes a connecting frame 31 and a grinding ring 32. One end of the connecting frame 31 is connected to the spindle 11, and the other end of the connecting frame 31 is connected to the grinding ring 32. A grinding strip 33 is provided on the side of the grinding ring 32 facing the hemisphere, and the grinding strip 33 is used to grind the hemisphere.

[0033] The following will further describe a valve disc 4 hemispherical grinding fixture according to this exemplary embodiment.

[0034] In some embodiments, the aforementioned fixing fixture 2 is disposed on the worktable of the drilling machine 1, including a base 21 and two sets of positioning components 22; the base 21 is located on the worktable surface of the drilling machine 1, and the two sets of positioning components 22 are disposed opposite to each other on the top surface of the base 21 for fixing both ends of the valve disc 4 and forming a clamping limit on the valve disc 4, thereby making the valve disc 4 installed stably and ensuring its position is stable during the grinding process, avoiding processing errors caused by vibration or displacement.

[0035] In a preferred embodiment, the positioning component 22 includes two opposing inclined supports 221 and a baffle 222 disposed between the two inclined supports 221. The two inclined supports 221 are integrally connected to the base 21, and the opposing inclined surfaces of the two inclined supports 221 form a clamping effect on both ends of the valve disc 4. During installation, the inclined surfaces on both ends of the valve disc 4 abut against this inclined surface, clamping it inward and preventing displacement in the direction of the line connecting the inclined supports 221. The baffle 222 is integrally connected to the two inclined supports 221 and is disposed on the side of the two inclined supports 221 near the center of the base 21. When installing the valve disc 4, the baffle 222 is located inside the valve disc 4 and abuts against the valve disc 4. The two baffles 222 respectively limit the relative inner sides of the valve disc 4, preventing the valve disc 4 from shifting in the direction of the line connecting the two sets of positioning components 22. Through the above structure, the valve plate can be limited and fixed, preventing displacement in multiple directions and ensuring its stable position during the grinding process.

[0036] As a preferred embodiment, the top of the baffle 222 is arc-shaped, which fits the inner wall of the hemisphere to avoid interference and unstable installation. The two opposing baffles 222 are provided with axially penetrating through holes. By providing through holes, the valve disc 4 can be further fixed by passing through structures such as limiting rods.

[0037] In a preferred embodiment, the outer side of the aforementioned diagonal brace 221 is fixedly connected to the base 21 by a triangular rib plate 223. Since the diagonal brace 221 is inclined, a triangular rib plate 223 is provided between the angle between it and the base 21 to support the diagonal brace 221 and improve its stability.

[0038] In some embodiments, the aforementioned grinding fixture 3 is connected to the spindle 11 of the drilling machine 1, and includes a connecting frame 31 and a grinding ring 32; one end of the connecting frame 31 is connected to the spindle 11, and the other end of the connecting frame 31 is connected to the grinding ring 32; a grinding strip 33 is provided on the side of the grinding ring 32 facing the hemispherical surface, and the grinding strip 33 is used to grind the hemispherical surface. The grinding ring 32 is rotated by the spindle 11, and the grinding strip 33 contacts the spherical surface of the valve disc 4 to grind the valve disc 4.

[0039] In actual operation, after the drill press 1 is started, the spindle 11 rotates at the set speed, and the grinding fixture 3 and the surface of the valve disc 4 move relative to each other. By adjusting the speed and feed rate of the drill press 1, the grinding depth and effect can be precisely controlled, thereby achieving efficient machining of the spherical surface of the valve disc 4.

[0040] In a preferred embodiment, the connecting frame 31 includes a fixing member 311, a connecting shaft 312, and a plurality of connecting rods 313. The plurality of connecting rods 313 are arranged in an umbrella shape around the periphery of the fixing member 311, and the distal ends of the plurality of connecting rods 313 are respectively fixedly connected to the top surface of the grinding ring 32; the plurality of connecting rods 313 form a stable connection to the grinding ring 32.

[0041] The aforementioned connecting shaft 312 is located at the end of one of the connecting rods 313 near the fixing member 311 and is connected to the fixing member 311. The connecting shaft 312 is used to connect to the main shaft 11. The connecting shaft 312 and the fixing member 311 are misaligned, so that the rotation center of the connecting frame 31 is misaligned with the rotation center of the main shaft 11, forming a rotational eccentric structure. The rotational eccentric structure causes the grinding ring 32 to oscillate and reciprocate during the rotation of the connecting frame 31 driven by the main shaft 11. This prevents the grinding strip 33 from grinding the valve disc 4 at the same position, thus avoiding uneven grinding and inconsistent roughness.

[0042] In a preferred embodiment, the grinding ring 32 is inclined on the side facing the hemisphere, and the grinding strip 33 is disposed on the inclined surface, with the side of the grinding strip 33 facing the hemisphere adapted to the shape of the hemisphere.

[0043] In a preferred embodiment, the aforementioned fixing member 311 includes a ball shaft 3111 and a sleeve 3112. One end of the ball shaft 3111 is provided with a ball head, which is movably disposed inside the sleeve 3112. The other end of the ball shaft 3111 is welded to the connecting shaft 312. Multiple connecting rods 313 are connected to the periphery of the sleeve 3112. By providing the ball shaft 3111 with a ball head, there is a certain rotational clearance between it and the connecting frame 31. When the spindle 11 of the drilling machine 1 applies downward pressure, the ball head can rotate freely within the sleeve 3112, facilitating the eccentric oscillation of the connecting frame 31 and the grinding ring 32.

[0044] In a preferred embodiment, the grinding ring 32 is inclined on the side facing the hemisphere, and the grinding strip 33 is disposed on the inclined surface. The side of the grinding strip 33 facing the hemisphere is adapted to the shape of the hemisphere to ensure that it can make uniform contact with the surface of the valve disc 4 during the grinding process.

[0045] Furthermore, the length of the aforementioned grinding strip 33 is greater than the length of the inclined surface of the grinding ring 32, ensuring that the grinding can be carried out thoroughly.

[0046] Furthermore, the aforementioned grinding strip 33 is a honing oilstone strip. It has high processing precision and good surface quality. The distribution and arrangement of abrasive particles can be adjusted as needed to improve grinding efficiency and processing quality. It can not only remove minor defects on the surface of the valve disc 4, but also effectively reduce surface roughness and improve the overall quality of the parts.

[0047] Furthermore, unless otherwise explicitly specified or limited, the terms "installation" and "connection" in this application embodiment should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. The terms "upper," "lower," "left," "right," "inner," "outer," and "side," etc., are merely for reference to the direction in the accompanying drawings or the usual placement of the product during use. They are only for clearly describing this application and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limitations on this application. The terms "first," "second," etc., are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance; "multiple" refers to at least two. In this application embodiment, the limitations on relative positional relationships such as parallel, perpendicular, and aligned are all relative to the current technological level and are not absolutely strict limitations. Slight deviations are allowed; approximations of parallel, perpendicular, and aligned are all acceptable. For example, "A and B are parallel" means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 degrees and 10 degrees.

[0048] The above are only some embodiments and implementation methods of this application. The protection scope of this application is not limited thereto. In the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. Any combination of features in different embodiments is also within the protection scope of this application. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the protection scope of this application.

Claims

1. A tooling for grinding the hemispherical surface of a valve disc, characterized in that, Includes drilling machines, fixed fixtures, and grinding fixtures. The fixing fixture is set on the worktable of the drilling machine and includes a base and two sets of positioning components; the two sets of positioning components are arranged opposite to each other on the top surface of the base and are used to fix the two ends of the valve disc. The grinding fixture is connected to the spindle of the drilling machine and includes a connecting frame and a grinding ring; one end of the connecting frame is connected to the spindle, and the other end of the connecting frame is connected to the grinding ring; a grinding strip is provided on the side of the grinding ring facing the hemisphere, and the grinding strip is used to grind the hemisphere.

2. The valve disc hemispherical grinding fixture according to claim 1, characterized in that, The positioning component includes two opposing diagonal braces and a baffle plate disposed between the two diagonal braces. The two diagonal braces are integrally connected to the base, and the relative inclined surfaces of the two diagonal braces form a clamping effect on both ends of the valve disc; The baffle is integrally connected to the two diagonal braces and is located on the side of the two diagonal braces near the center of the base; when the valve disc is installed, the baffle is located inside the valve disc and abuts against the valve disc.

3. The valve disc hemispherical grinding fixture according to claim 2, characterized in that, The top of the baffle is arc-shaped, and the two opposing baffles have axially penetrating through holes.

4. The valve disc hemispherical grinding fixture according to claim 2, characterized in that, The outer side of the diagonal brace is fixedly connected to the base by a triangular rib plate.

5. The valve disc hemispherical grinding fixture according to claim 1, characterized in that, The connecting frame includes a fixing component, a connecting shaft, and multiple connecting rods. The plurality of connecting rods are arranged in an umbrella shape around the periphery of the fixing member, and the distal ends of the plurality of connecting rods are respectively fixedly connected to the top surface of the grinding ring; The connecting shaft is disposed at the end of one of the connecting rods near the fixing member and is connected to the fixing member. The connecting shaft is used to connect to the main shaft.

6. The valve disc hemispherical grinding fixture according to claim 5, characterized in that, The fixing component includes a ball shaft and a sleeve. One end of the ball shaft is provided with a ball head, which is movably disposed inside the sleeve. The other end of the ball shaft is connected to the connecting shaft. The plurality of connecting rods are connected to the periphery of the sleeve.

7. The valve disc hemispherical grinding fixture according to claim 1, characterized in that, The grinding ring is inclined on the side facing the hemisphere, and the grinding strip is disposed on the inclined surface. The side of the grinding strip facing the hemisphere is adapted to the shape of the hemisphere.

8. The valve disc hemispherical grinding fixture according to claim 7, characterized in that, The grinding strip is a honing oilstone strip.

9. The valve disc hemispherical grinding fixture according to claim 7, characterized in that, The length of the grinding strip is greater than the length of the inclined surface of the grinding ring.

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