Numerical control ball grinding machine for valve ball

Abstract

The utility model belongs to valve ball machining technical field especially relates to a valve ball numerical control ball grinding machine bed, include: work table, the top of work table swingly provided with the cylinder for supporting partial sphere, the top of cylinder is provided with the flexible water permeable layer for scraping sphere surface chippings, the inner chamber fixed connection of work table has the pump body, the pump body is used for supplying fluid to the cylinder, fluid passes through flexible water permeable layer and carries out the push support to sphere, fixed frame, the fixed frame fixed setting in work table's top one end, the side wall of fixed frame is provided with the grinding wheel for grinding sphere, the top both ends of fixed frame are rotatoryly installed rotatory shaft, the bottom fixed connection of rotatory shaft has first drive roll, compared with prior art, the utility model avoids rigid support and the hard contact of valve ball surface, prevents the scratch of valve ball surface, improves the polishing precision of valve ball surface, avoids the polishing dead angle, improves the processing efficiency of valve ball.

Description

Technical Field

[0001] This utility model belongs to the field of valve ball processing technology, and in particular relates to a CNC ball milling machine for valve balls. Background Technology

[0002] The valve ball is the core opening and closing component of a ball valve. It is usually a ball with a circular through hole. It rotates 90° around the axis driven by the valve stem to control the flow of fluid. During the production and processing of the valve ball, the surface of the valve ball needs to be polished to achieve a high degree of smoothness in order to reduce friction and wear on the sealing surface, eliminate machining marks, and improve surface quality. Currently, ball milling machines are commonly used to polish the surface of the valve ball.

[0003] Chinese patent publication number 201721121673.8 discloses a small, high-precision CNC spherical grinding machine, including a bed, a spindle mechanism, and a planetary grinding mechanism. Both the spindle mechanism and the planetary grinding mechanism are mounted on the bed. The spindle mechanism includes a machine tool spindle, a spindle seat, and a spindle drive mechanism. The planetary grinding mechanism includes a planetary disk, a grinding wheel, a grinding spindle, a grinding seat, and a grinding drive mechanism. The planetary disk is located behind the spindle, and a grinding spindle is connected to the center of the rear side of the planetary disk. The grinding spindle is mounted on the grinding seat via a bearing seat, and the grinding seat is mounted on the bed. The rear end of the grinding spindle is connected to the grinding drive mechanism via a belt drive mechanism. The grinding wheel is mounted on the front side of the planetary disk and fixed to the planetary disk by a fixing bracket. Grinding of the workpiece surface is achieved by rotating the workpiece in conjunction with the planetary disk driving the grinding wheel to rotate around the workpiece. This method has low operating costs, is suitable for processing large valve balls, and has high processing efficiency, making it worthy of widespread promotion.

[0004] However, existing technologies have the following problems when used: 1. Current ball mills mostly use rigid support structures for valve balls, which can easily make hard contact with the valve ball surface during grinding, resulting in scratches on the valve ball surface and affecting the grinding accuracy of the valve ball surface.

[0005] 2. Some machine tools can only drive the valve ball to rotate through a single drive component, which cannot achieve multi-track compound rotation, making it difficult to grind the valve ball surface in all directions and reducing the processing efficiency of the valve ball. Utility Model Content

[0006] The purpose of this utility model is to address the aforementioned technical problems by providing a CNC ball milling machine for valve balls, comprising: The workbench has a cylinder movably mounted on its top for supporting part of the sphere. The top of the cylinder is provided with a flexible permeable layer for scraping off debris from the surface of the sphere. A pump is fixedly connected to the inner cavity of the workbench. The pump is used to supply fluid into the cylinder. The fluid passes through the flexible permeable layer and pushes the sphere. A fixed frame is fixedly installed at one end of the top of the workbench. A grinding wheel for grinding balls is provided on one side wall of the fixed frame. Rotating shafts are rotatably installed at both ends of the top of the fixed frame. A first drive roller is fixedly connected to the bottom of the rotating shaft. A rotating cylinder is rotatably connected to the outer peripheral wall of the rotating shaft. A second drive roller is fixedly connected to the bottom of the rotating cylinder. The top of the fixed frame is equipped with a first motor and a second motor for driving the first drive roller and the second drive roller to rotate respectively, which enables the first drive roller and the second drive roller to rotate at different speeds, thereby driving the ball to rotate and cooperating with the grinding wheel to grind the surface of the ball.

[0007] Furthermore, a telescopic cylinder is fixedly connected to the top of the workbench, and a movable seat is fixedly connected to the power end of the telescopic cylinder. The movable seat is slidably mounted on the workbench and fixedly mounted to the cylinder body.

[0008] Furthermore, a fixing ring is fixedly connected to the outer side of the flexible permeable layer, and the fixing ring is fixedly connected to the cylinder by bolts. The flexible permeable layer is made of gauze material.

[0009] Furthermore, the output end of the pump body is connected to a delivery hose, which passes through the workbench and the cylinder and communicates with the inner cavity of the cylinder.

[0010] Furthermore, a mounting frame is fixedly connected to the top of the fixing frame, the rotating shaft is rotatably disposed in the inner cavity of the mounting frame, the second motor is fixedly connected to the top of the mounting frame, and the power output end of the second motor passes through the top of the mounting frame and is fixedly connected to the rotating shaft.

[0011] Furthermore, a worm gear is fixedly connected to the upper end of the side wall of the rotating cylinder. The worm gear is located in the inner cavity of the mounting frame. A worm gear meshing with the worm gear is rotatably connected to the inner cavity of the mounting frame. The first motor is fixedly connected to the side wall of the mounting frame. The output end of the first motor passes through the side wall of the mounting frame and is fixedly connected to the worm gear.

[0012] Furthermore, a drain valve is connected to the side wall of the cylinder.

[0013] Furthermore, both the top of the first drive roller and the bottom of the second drive roller are provided with rolling surfaces.

[0014] Furthermore, the upper end of the inner wall of the fixing ring is provided with an arc-shaped portion to facilitate support of the sphere.

[0015] Compared with the prior art, the valve ball CNC ball milling machine tool of this utility model has the following advantages: 1. Fluid is supplied to the cylinder through the pump body inside the workbench. After passing through the flexible permeable layer, the fluid forms a flexible push against the valve ball, avoiding hard contact between the rigid support and the surface of the valve ball and preventing scratches on the surface of the valve ball. At the same time, the flexible push can adapt to the posture changes of the valve ball during the grinding process, ensuring the posture stability of the valve ball during grinding. Furthermore, the flexible permeable layer can remove impurities from the surface of the ball, improving the grinding accuracy of the valve ball surface.

[0016] 2. The first and second motors on the fixed frame drive the first and second drive rollers to rotate at different speeds, thereby causing the valve ball to generate a compound rotational motion. In conjunction with the grinding wheel, the surface of the valve ball can be ground in an all-round manner, avoiding grinding dead corners and improving the processing efficiency of the valve ball. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a partial cross-sectional view of the present invention; Figure 3 This is an exploded view of the second drive roller of this utility model; Figure 4 This is a split diagram of the flexible permeable layer of this utility model; Figure 5 This is an enlarged structural diagram of the fixing ring of this utility model.

[0018] The markings in the diagram are as follows: 100, workbench; 110, telescopic cylinder; 111, moving seat; 120, cylinder; 121, drain valve; 130, flexible permeable layer; 131, fixing ring; 132, bolt; 133, arc-shaped part; 140, pump body; 141, conveying hose; 200, fixing frame; 210, mounting frame; 220, rotating shaft; 221, first drive roller; 230, rotating cylinder; 231, second drive roller; 232, worm gear; 233, rolling surface; 240, worm; 250, first motor; 251, second motor; 260, grinding wheel. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0020] It should be noted that all directional and positional terms used in this utility model, such as "up," "down," "left," "right," "front," "back," "vertical," "horizontal," "inner," "outer," "top," "lower," "lateral," "longitudinal," and "center," are only used to explain the relative positional relationships and connection arrangements between components in a specific state (as shown in the accompanying drawings). They are merely for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. Furthermore, descriptions involving "first," "second," etc., in this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0021] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0023] like Figures 1-5 As shown, a CNC ball milling machine for valve balls includes: The workbench 100 has a cylinder 120 movably mounted on its top for supporting part of the sphere. The top of the cylinder 120 is provided with a flexible permeable layer 130 for scraping debris from the surface of the sphere. A pump 140 is fixedly connected to the inner cavity of the workbench 100. The pump 140 is used to supply fluid into the cylinder 120. The fluid passes through the flexible permeable layer 130 and pushes the sphere. Specifically, the fluid can permeate and diffuse evenly along its pores in the flexible permeable layer, so that the pushing force is evenly transmitted to the surface of the sphere through the contact surface between the permeable layer and the sphere, reducing local stress concentration and avoiding scratches, indentations or structural damage to the surface of the sphere caused by rigid pushing. A fixed frame 200 is fixedly installed at one end of the top of the workbench 100. A grinding wheel 260 for grinding balls is provided on one side wall of the fixed frame 200. Rotating shafts 220 are rotatably installed at both ends of the top of the fixed frame 200. A first drive roller 221 is fixedly connected to the bottom of the rotating shaft 220. A rotating cylinder 230 is rotatably connected to the outer peripheral wall of the rotating shaft 220. A second drive roller 231 is fixedly connected to the bottom of the rotating cylinder 230. The top of the fixed frame 200 is provided with a first motor 250 and a second motor 251 for driving the first drive roller 221 and the second drive roller 231 to rotate respectively, which enables the first drive roller 221 and the second drive roller 231 to rotate at different speeds, thereby driving the ball to rotate and cooperating with the grinding wheel 260 to grind the surface of the ball.

[0024] As a preferred example of this utility model, the cylinder 120 movably mounted on the top of the workbench 100 can support the sphere. The flexible permeable layer 130 on its top can scrape off surface grinding debris in real time when the sphere rotates, avoiding debris adhesion that affects accuracy. The fluid supplied to the cylinder 120 by the pump body 140 in the inner cavity of the workbench 100 passes through the flexible permeable layer 130 and forms a flexible push support for the sphere, ensuring the stability of the sphere's posture during grinding and avoiding scratches caused by rigid support. The first motor 250 and the second motor 251 on the fixed frame 200 drive the first drive roller 221 and the second drive roller 231 to rotate at different speeds, which can drive the sphere to generate rotational motion, and achieve all-round grinding in conjunction with the grinding wheel 260.

[0025] In the example of this application, a telescopic cylinder 110 is fixedly connected to the top of the workbench 100, and a movable seat 111 is fixedly connected to the power end of the telescopic cylinder 110. The movable seat 111 is slidably disposed on the workbench 100 and fixedly disposed with the cylinder 120.

[0026] As a preferred example of this utility model, the telescopic cylinder 110 on the top of the worktable 100 is connected to the moving seat 111 at its power end. When the moving seat 111 slides, it can drive the cylinder 120 to move synchronously, which can adjust the relative position of the ball supported on the cylinder 120 and the grinding wheel 260 on the fixed frame 200, thereby enhancing the adaptability of the machine tool.

[0027] In the example of this application, a fixing ring 131 is fixedly connected to the outer side of the flexible permeable layer 130. The fixing ring 131 is fixedly connected to the cylinder 120 by bolts 132. The flexible permeable layer 130 is made of gauze material.

[0028] As a preferred example of this utility model, the fixing ring 131 on the outside of the flexible permeable layer 130 is fixed to the cylinder 120 by bolts 132 to form a detachable structure. When the flexible permeable layer 130 is worn or clogged due to long-term scraping, the bolts 132 can be easily removed and replaced, reducing the difficulty of maintenance. The flexible permeable layer 130 made of polyethylene material is not only highly wear-resistant and can withstand the rotational friction of the ball for a long time without being easily damaged, but also has good chemical stability.

[0029] In the example of this application, the output end of the pump body 140 is connected to a delivery hose 141, which passes through the workbench 100 and the cylinder 120 and communicates with the inner cavity of the cylinder 120.

[0030] As a preferred example of this utility model, the delivery hose 141 at the output end of the pump body 140 passes through the workbench 100 and the cylinder 120 and connects to the inner cavity of the cylinder 120. Its flexibility can adapt to the sliding displacement of the cylinder 120 caused by the telescopic cylinder 110, and avoid the rigid pipe being pulled and damaged due to movement. At the same time, the delivery hose 141 can send the fluid output by the pump body 140 into the cylinder 120 to ensure that the pushing force of the fluid on the ball is continuous and uniform.

[0031] In the example of this application, the top of the mounting frame 200 is fixedly connected to the mounting frame 210, the rotating shaft 220 is rotatably disposed in the inner cavity of the mounting frame 210, the second motor 251 is fixedly connected to the top of the mounting frame 210, the power output end of the second motor 251 passes through the top of the mounting frame 210 and is fixedly connected to the rotating shaft 220.

[0032] As a preferred example of this utility model, the mounting frame 210 at the top of the fixing bracket 200 provides a closed mounting space for components such as the rotating shaft 220 and the second motor 251. This not only prevents grinding debris and coolant from splashing in to protect the components, but also ensures the coaxiality of the rotating shaft 220 during rotation and reduces transmission errors. The second motor 251 is fixed to the top of the mounting frame 210, and its power output end is directly connected to the rotating shaft 220 to realize the rotation of the rotating shaft 220.

[0033] In the example of this application, a worm gear 232 is fixedly connected to the upper end of the side wall of the rotating cylinder 230. The worm gear 232 is located in the inner cavity of the mounting frame 210. A worm 240 that meshes with the worm gear 232 is rotatably connected to the inner cavity of the mounting frame 210. A first motor 250 is fixedly connected to the side wall of the mounting frame 210. The output end of the first motor 250 passes through the side wall of the mounting frame 210 and is fixedly connected to the worm 240.

[0034] As a preferred example of this utility model, the worm gear 232 at the upper end of the side wall of the rotating cylinder 230 meshes with the worm 240 in the inner cavity of the mounting frame 210. When the first motor 250 drives the worm 240 to rotate, the rotating cylinder 230 and the second drive roller 231 are driven to rotate through the worm gear 232. With the difference in speed between the first motor 250 and the second motor 251, the composite rotation trajectory of the ball can be adjusted. At the same time, the self-locking characteristic can prevent the second drive roller 231 from reversing or deviating in speed due to the reaction force of the grinding wheel 260, thus ensuring the stability of its rotation direction and speed.

[0035] In the example of this application, the side wall of the cylinder 120 is connected to a drain valve 121.

[0036] As a preferred example of this utility model, the drain valve 121 connected to the side wall of the cylinder 120 can conveniently discharge the fluid inside the cylinder, and can discharge the dirty fluid mixed with grinding debris, avoiding secondary scratches on the surface of the ball caused by debris accumulation.

[0037] In the example of this application, the top of the first drive roller 221 and the bottom of the second drive roller 231 are both provided with rolling surfaces 233.

[0038] As a preferred example of this utility model, the rolling surfaces 233 at the top of the first drive roller 221 and the bottom of the second drive roller 231 increase the contact area between the drive roller and the ball, avoiding excessive local pressure that could cause indentations on the surface of the ball; at the same time, the increased contact area can reduce slippage between the ball and the drive roller, ensuring that the speed of the drive roller is accurately transmitted to the ball and that its rotation trajectory is stable.

[0039] In the example of this application, the upper end of the inner sidewall of the fixing ring 131 is provided with an arc-shaped portion 133 to facilitate support of the sphere, and the arc-shaped portion 133 is circumferentially distributed on the inner sidewall of the fixing ring 131.

[0040] As a preferred example of this utility model, the arc-shaped portion 133 at the upper end of the inner sidewall of the fixing ring 131 forms a guiding support. When placing the ball, the arc-shaped portion 133 can guide the ball to fall quickly and accurately into the preset support position of the cylinder 120, avoiding placement deviation that could lead to subsequent grinding position deviation, and improving feeding efficiency and accuracy.

[0041] In use, the workbench 100 serves as a basic support. Its top telescopic cylinder 110 drives the sliding seat 111 to adjust the position of the cylinder 120 fixed to the moving seat 111, ensuring effective contact between the ball supported on the cylinder 120 and the grinding wheel 260 on one side of the fixed frame 200. A flexible permeable polyethylene layer 130, detachably mounted on the top of the cylinder 120 via a fixing ring 131 and bolts 132, not only scrapes away surface grinding debris in real time as the ball rotates, preventing debris from affecting grinding accuracy, but also guides the ball to fall into the preset support position on the cylinder 120 via the arc-shaped portion 133 on the upper inner wall of the fixing ring 131. The pump 140 inside the workbench 100 supplies fluid into the cylinder 120 through a delivery hose 141. The fluid passes through the flexible permeable layer... The permeable layer 130 provides flexible support to the ball. The mounting frame 210 at the top of the fixing frame 200 provides a closed protective space for the transmission components. The rotating shaft 220 with its inner cavity is fixed to the bottom of the first drive roller 221 and the rotating cylinder 230 is fixed to the outer peripheral wall. The power output end of the second motor 251 is directly connected to the rotating shaft 220, which can drive the second drive roller 231 to rotate. The first motor 250 drives the first drive roller 221 to rotate by driving the worm 240 that meshes with the worm gear 232 at the upper end of the side wall of the rotating cylinder 230. The rolling surface 233 at the top of the first drive roller 221 and the bottom of the second drive roller 231 can increase the contact area with the ball. With the help of the grinding wheel 260, the ball can be ground in all directions, effectively improving the roundness and smoothness of the valve ball surface.

[0042] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A CNC ball milling machine for valve balls, characterized in that, include: A workbench (100) is provided with a cylinder (120) on the top of the workbench (100) for supporting part of the sphere. A flexible permeable layer (130) is provided on the top of the cylinder (120) for scraping off debris from the surface of the sphere. A pump body (140) is fixedly connected to the inner cavity of the workbench (100). The pump body (140) is used to supply fluid into the cylinder (120). The fluid passes through the flexible permeable layer (130) and pushes the sphere. A fixed frame (200) is fixedly installed at one end of the top of the workbench (100). A grinding wheel (260) for grinding the ball is provided on one side wall of the fixed frame (200). Rotating shafts (220) are rotatably installed at both ends of the top of the fixed frame (200). A first drive roller (221) is fixedly connected to the bottom of the rotating shaft (220). A rotating cylinder (230) is rotatably connected to the outer peripheral wall of the rotating shaft (220). A second drive roller (231) is fixedly connected to the bottom of the rotating cylinder (230). The top of the fixed frame (200) is provided with a first motor (250) and a second motor (251) for driving the first drive roller (221) and the second drive roller (231) to rotate respectively, which enables the first drive roller (221) and the second drive roller (231) to rotate at different speeds, thereby driving the ball to rotate and cooperating with the grinding wheel (260) to grind the surface of the ball.

2. The CNC ball milling machine tool for valve balls according to claim 1, characterized in that, A telescopic cylinder (110) is fixedly connected to the top of the workbench (100), and a movable seat (111) is fixedly connected to the power end of the telescopic cylinder (110). The movable seat (111) is slidably disposed on the workbench (100) and fixedly connected to the cylinder (120).

3. The CNC ball milling machine tool for valve balls according to claim 1, characterized in that, A fixing ring (131) is fixedly connected to the outside of the flexible permeable layer (130), and the fixing ring (131) is fixedly connected to the cylinder (120) by bolts (132).

4. The CNC ball milling machine tool for valve balls according to claim 1, characterized in that, The flexible permeable layer (130) is made of gauze.

5. A CNC ball milling machine tool for valve balls according to claim 3, characterized in that, The output end of the pump body (140) is connected to a delivery hose (141), which passes through the workbench (100) and the cylinder (120) and is connected to the inner cavity of the cylinder (120).

6. A CNC ball milling machine tool for valve balls according to claim 5, characterized in that, The top of the fixed frame (200) is fixedly connected to the mounting frame (210), the rotating shaft (220) is rotatably disposed in the inner cavity of the mounting frame (210), the second motor (251) is fixedly connected to the top of the mounting frame (210), the power output end of the second motor (251) passes through the top of the mounting frame (210) and is fixedly connected to the rotating shaft (220).

7. A CNC ball milling machine tool for valve balls according to claim 6, characterized in that, A worm gear (232) is fixedly connected to the upper end of the side wall of the rotating cylinder (230). The worm gear (232) is located in the inner cavity of the mounting frame (210). A worm (240) that meshes with the worm gear (232) is rotatably connected to the inner cavity of the mounting frame (210). The first motor (250) is fixedly connected to the side wall of the mounting frame (210). The output end of the first motor (250) passes through the side wall of the mounting frame (210) and is fixedly connected to the worm (240).

8. A CNC ball milling machine tool for valve balls according to claim 1, characterized in that, The side wall of the cylinder (120) is connected to a drain valve (121).

9. A CNC ball milling machine tool for valve balls according to claim 1, characterized in that, The top of the first drive roller (221) and the bottom of the second drive roller (231) are both provided with rolling surfaces (233).

10. A CNC ball milling machine for valve balls according to claim 3, characterized in that, The upper end of the inner sidewall of the fixing ring (131) is provided with an arc-shaped part (133).

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