Valve spherical surface grinding tool

Abstract

The utility model discloses a valve spherical surface grinding tool which comprises a machine body, a grinding driving assembly is installed on the machine body through a rocker arm, a grinding disc is installed at the driving end of the driving assembly through a crank arm assembly, and a grinding tool is installed on a machine body of the machine body. The grinding tool is composed of a three-jaw chuck and a positioning chuck, the three-jaw chuck is fixed to the top of the positioning chuck, the positioning chuck comprises a clamping base and an ejector, the ejector is fixed to the center in the clamping base, the interior of the clamping base is communicated with the interior of the three-jaw chuck, the bottom of the spherical workpiece extends into the clamping base to make contact with the ejector, and the three-jaw chuck clamps the upper portion of the spherical workpiece. According to the valve spherical surface grinding tool, through combination of the three-jaw chuck and the positioning chuck, dual-purpose clamping of a cylinder and a ball is achieved, the requirement for the clamping precision of machining and remanufacturing of mechanical product accessories is met, and for the machining and remanufacturing industry of most mechanical product accessories for machining the cylinder and the ball, the replacement frequency of clamps is greatly reduced.

Description

Technical Field

[0001] The utility model relates to a grinding tool for a valve spherical surface. Background Art

[0002] A ball valve is a valve in which the opening and closing part (ball) is driven by the valve stem and rotates around the axis of the ball valve. Large ball valves are expensive, and it is inevitable that the valve core of the ball valve will wear out during use. Therefore, for some repairable and remanufacturable valve cores, they can be repaired and put back into use through grinding and other remanufacturing processes.

[0003] For the processing and remanufacturing of grinding machinery product accessories, the practicality of tooling and fixtures is related to the efficiency of production and processing, because this field does not process large quantities of products of the same specification. All special fixtures purchased on the market cannot meet the clamping and fixation of cylinders and spheres, resulting in the need to prepare two or even more specifications of fixtures. When used in this field, not only is the cost of purchasing fixtures high, but the replacement and coordinate calibration of the fixtures is very time-consuming and manpower-consuming, and this is why this application is filed. Utility Model Content

[0004] The utility model aims to provide a valve spherical surface grinding tool to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A valve spherical grinding tool comprises a machine body, a grinding drive assembly is mounted on the machine body via a rocker arm, a grinding disc is mounted on the driving end of the drive assembly via a crank arm assembly, and the grinding tool is mounted on the bed of the machine body;

[0007] The grinding tooling consists of a three-jaw chuck and a positioning chuck. The three-jaw chuck is fixed on the top of the positioning chuck. The positioning chuck includes a chuck seat and a pusher. The pusher is fixed at the center position of the chuck. The interior of the chuck is connected with the interior of the three-jaw chuck. The bottom of the spherical workpiece extends into the chuck seat and contacts with the pusher. The three-jaw chuck clamps the upper part of the spherical workpiece.

[0008] As a further solution of the utility model: the three-jaw chuck and the positioning chuck are fixed by bolts, and a right-angle groove is provided at one end of the three-jaw chuck that contacts the spherical workpiece, and the bottom of the right-angle groove is chamfered in an arc shape.

[0009] As a further solution of the utility model: the positioning chuck also includes an inner sleeve shaft, an outer sleeve and a telescopic device, the inner sleeve shaft is fixed at the center position of the bottom of the chuck, the outer sleeve can be vertically slidably installed on the outside of the inner sleeve shaft, the telescopic device is fixed inside the inner sleeve shaft, and the output end of the telescopic device is fixed to the outer sleeve.

[0010] As a further solution of the utility model: the ejector is fixed on the top of the outer sleeve, and the telescopic device drives the outer sleeve to slide up and down on the outside of the inner sleeve shaft, driving the ejector to move up and down.

[0011] As a further solution of the utility model: the top piece device is a circular ring, and the bottom of the spherical workpiece sits on the circular ring.

[0012] As a further solution of the utility model: a countersunk hole is provided inside the holder, and the outer sleeve can sink into the countersunk hole when it contracts downward.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The valve spherical grinding tooling realizes dual-purpose clamping of cylinders and spheres through the combination of a three-jaw chuck and a positioning chuck, which is sufficient to meet the clamping accuracy required for the processing and remanufacturing of mechanical product accessories. For the processing and remanufacturing industries that mostly process cylinders and spheres, the replacement frequency of the fixtures is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a valve spherical surface grinding tool;

[0016] Figure 2 It is a structural stereogram of a grinding tool in a valve spherical surface grinding tool;

[0017] Figure 3 This is a structural exploded view of a grinding tool in a valve ball surface grinding tool;

[0018] Figure 4 The figure is a schematic diagram of the structure of a grinding tool in a valve spherical grinding tool.

[0019] In the figure: 1. machine body; 2. rocker arm; 3. grinding drive assembly; 4. crank arm assembly; 5. grinding disc; 6. bed; 7. positioning chuck; 701. chuck seat; 702. inner sleeve shaft; 703. outer sleeve; 704. telescopic device; 705. ejector; 8. three-jaw chuck; 9. spherical workpiece; 10. right-angle groove. DETAILED DESCRIPTION

[0020] See also Figures 1 to 4 In the embodiment of the utility model, a valve spherical grinding tool comprises a body 1, a grinding drive assembly 3 is installed on the body 1 through a rocker arm 2, a grinding disc 5 is installed on the driving end of the drive assembly 3 through a crank arm assembly 4, and a grinding tool is installed on a bed 6 of the body 1;

[0021] The grinding tool consists of a three-jaw chuck 8 and a positioning chuck 7. The three-jaw chuck 8 is fixed on the top of the positioning chuck 7. The positioning chuck 7 includes a base 701 and a top piece 705. The top piece 705 is fixed at the center position of the base 701. The inside of the base 701 is connected with the inside of the three-jaw chuck 8. The bottom of the spherical workpiece 9 extends into the base 701 and contacts with the top piece 705. The three-jaw chuck 8 clamps the upper part of the spherical workpiece 9. The machine body 1, the rocker arm 2, the grinding drive assembly 3, the crank arm assembly 4 and the grinding disc 5 are all prior art. The coordinate position of the grinding drive assembly 3 is adjusted by the rocker arm 2. The grinding drive assembly 3 drives the grinding disc 5 to grind through the crank arm assembly 4. The three-jaw chuck 8 and the positioning chuck 7 constitute the grinding tool. The positioning chuck 7 limits the clamping height of the workpiece. When clamping a solid workpiece, the push device 705 pushes the bottom of the workpiece, and the three-jaw chuck 8 clamps the periphery of the workpiece to form a stable clamp; when clamping a spherical workpiece 9, the push device 705 pushes the bottom of the spherical workpiece 9 to form a support, and the three-jaw chuck 8 is located in the upper center of the spherical workpiece 9. During the clamping process, the claws of the three-jaw chuck 8 push the spherical workpiece 9 downward as the clamp is clamped, forming an upper and lower clamped fixed state with the push device 705, and under the clamping of the three-jaw chuck 8, it is kept in the center position, without the need to replace the fixture, realizing multifunctional clamping of cylinders and spheres, eliminating the need to replace the fixture, and being sufficient to meet the clamping accuracy of the processing and remanufacturing of mechanical product accessories, providing great convenience for most of the cylindrical and spherical products in this technical field, reducing the frequency of fixture replacement and even eliminating the need to replace other fixtures.

[0022] In a preferred embodiment, the three-jaw chuck 8 and the positioning chuck 7 are fixed by bolts, and a right-angle groove 10 is provided at the end of the three-jaw chuck 8 that contacts the spherical workpiece 9, and the bottom of the right-angle groove 10 is chamfered in an arc shape. The three-jaw chuck 8 is a prior art, and the three-jaw chuck 8 and the positioning chuck 7 are fixed together by bolts, which provides convenience in maintenance and replacement of the equipment. Because the clamp is also designed to clamp the spherical workpiece 9, the original one-point contact mode of the three-jaw chuck 8 is prone to cause unstable fixation. For this purpose, a right-angle groove 10 is opened, and each jaw is upgraded from one-point contact clamping to two-point contact clamping, thereby improving the stability of the spherical clamping, and the jaw width can also be increased to further improve the effect.

[0023] In a preferred embodiment, the positioning chuck 7 also includes an inner sleeve shaft 702, an outer sleeve 703 and a telescopic device 704. The inner sleeve shaft 702 is fixed at the center position of the bottom of the chuck 701. The outer sleeve 703 can be vertically slidably installed on the outside of the inner sleeve shaft 702. The telescopic device 704 is fixed inside the inner sleeve shaft 702. The output end of the telescopic device 704 is fixed to the outer sleeve 703. The three-jaw chuck 8 and the positioning chuck 7 are fixed by bolts. Therefore, it is necessary to keep the ball clamped stably, and the top piece 705 to the three-jaw chuck 8 The distance between the jaws must be greater than the radius of the spherical workpiece 9 so that the jaws of the three-jaw chuck 8 can clamp the upper half of the spherical workpiece 9. Therefore, there is a limit on the size of the spherical workpiece 9. In order to be able to clamp spherical workpieces 9 of different sizes and specifications, the height of the ejector 705 can be adjusted through the inner sleeve shaft 702, the outer sleeve 703 and the telescopic device 704, and the distance between the ejector 705 and the jaws of the three-jaw chuck 8 can be changed, thereby realizing the clamping of spherical workpieces 9 of different sizes and diameters, and meeting the clamping of spherical workpieces 9 of more types and specifications.

[0024] In a preferred embodiment, the ejector 705 is fixed on the top of the outer sleeve 703, and the telescopic device 704 drives the outer sleeve 703 to slide up and down on the outside of the inner sleeve shaft 702, driving the ejector 705 to move up and down. The ejector 705 is a circular ring, and the bottom of the spherical workpiece 9 sits on the circular ring. A countersunk hole is opened inside the holder 701, and the outer sleeve 703 can sink into the countersunk hole when it contracts downward, providing a larger stroke for the ejector 705.

[0025] It should be noted that the above embodiments all belong to the same utility model concept, and the description of each embodiment has its own focus. For matters that are not described in detail in some embodiments, reference can be made to the description in other embodiments.

[0026] The above-mentioned embodiments only express the implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A valve spherical grinding tool, comprising a body (1), a grinding drive assembly (3) being mounted on the body (1) via a rocker arm (2), a grinding disc (5) being mounted on the driving end of the drive assembly (3) via a crank arm assembly (4), characterized in that: A grinding tool is installed on the bed (6) of the machine body (1); The grinding tooling is composed of a three-jaw chuck (8) and a positioning chuck (7). The three-jaw chuck (8) is fixed on the top of the positioning chuck (7). The positioning chuck (7) comprises a chuck seat (701) and a pusher (705). The pusher (705) is fixed at a central position in the chuck seat (701). The interior of the chuck seat (701) is connected to the interior of the three-jaw chuck (8). The bottom of the spherical workpiece (9) extends into the chuck seat (701) and contacts the pusher (705). The three-jaw chuck (8) clamps the upper part of the spherical workpiece (9).

2. A valve ball grinding tool according to claim 1, characterized in that: The three-jaw chuck (8) and the positioning chuck (7) are fixed by bolts; one end of the three-jaw chuck (8) that contacts the spherical workpiece (9) is provided with a right-angle groove (10), and the bottom of the right-angle groove (10) is chamfered in an arc shape.

3. A valve ball grinding tool according to claim 1, characterized in that: The positioning chuck (7) further comprises an inner sleeve shaft (702), an outer sleeve (703) and a telescopic device (704); the inner sleeve shaft (702) is fixed at the center position of the bottom of the chuck (701); the outer sleeve (703) is vertically slidably mounted on the outside of the inner sleeve shaft (702); the telescopic device (704) is fixed inside the inner sleeve shaft (702); and the output end of the telescopic device (704) is fixed to the outer sleeve (703).

4. A valve ball grinding tool according to claim 3, characterized in that: The pusher (705) is fixed on the top of the outer sleeve (703), and the telescopic device (704) drives the outer sleeve (703) to slide up and down on the outside of the inner sleeve shaft (702), thereby driving the pusher (705) to move up and down.

5. A valve ball grinding tool according to claim 3, characterized in that: The lifting device (705) is a torus, and the bottom of the spherical workpiece (9) sits on the torus.

6. A valve ball grinding tool according to claim 4, characterized in that: The interior of the holder (701) is provided with a countersunk hole, and the outer sleeve (703) can sink into the countersunk hole when it contracts downward.

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