Spherical numerical control grinding machining center capable of conveniently disassembling and assembling hemispheroid

Abstract

According to the technical scheme, the spherical numerical control grinding machining center is characterized in that the spherical numerical control grinding machining center comprises a clamping tool, a rotary disc, a rotary driving piece and a transverse rotating shaft unit, the transverse rotating shaft unit comprises a rotating flat plate, and the rotary disc is coaxially provided with a rotating cylinder; the clamping tool comprises a shaft body coaxial with the rotary disc, a positioning rod capable of penetrating through the shaft body in the diameter direction of the shaft body, a tray arranged outside the shaft body in a sleeving mode and capable of bearing the hemispheroid, and an ejected piece coaxial with the shaft body and capable of moving in the axis direction of the shaft body. The supporting piece is coaxially positioned on the jacked piece, and the two ends of the supporting piece are both located below the tray; the main pushing piece is located in the rotating cylinder and used for driving the jacked piece to move upwards; the adapter is partially inserted into the rotating cylinder in a penetrating mode; the rotating connector is connected with the other end of the adapter and externally connected with an oil pipe; the two ends of the positioning rod can be inserted into the two valve rod holes of the hemisphere in a penetrating mode respectively, and the problems that in the prior art, the hemisphere is difficult to disassemble and assemble and low in grinding precision are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of valve processing equipment, and more particularly to a spherical CNC grinding and processing center which is convenient for disassembling and assembling a hemisphere. Background Art

[0002] Ball valve hemispheres primarily include V-shaped and eccentric hemispheres, with the V-shaped being the most common. V-shaped ball valves are widely used in the installation and use of petroleum, chemical, and water supply pipelines. Their fundamental characteristic is a metal seal, which forms a hard seal by fitting and pressing the sealing surface of the V-shaped ball against the sealing surface of the valve seat. To ensure a full fit between the sealing surfaces of the V-shaped ball and the valve seat, both the V-shaped ball and the valve seat must be ground.

[0003] There is a Chinese patent with the publication number "CN118268959A" that discloses a hemispherical spherical CNC grinding processing center, which includes a clamping tool, a rotary disk for carrying the clamping tool, a rotary drive member for driving the rotary disk to rotate, and a transverse axis unit for driving the rotary drive member to swing. The clamping tool includes two brackets, an upper pressure drive member installed on the bracket seat, a top block positioned on the output shaft of the upper pressure drive member, an expansion body movably connected to the bracket seat and capable of being inserted at the end of the hemisphere, and a movably connected and expanded body. The center pressure rod in the cavity of the expansion body adjusts the distance between the two bracket seats so that the valve stem holes at both ends of the hemisphere can be respectively sleeved on the two expansion bodies. Then, the top block is used to press the center pressure rod tightly so that the contact inclined surfaces of the two are staggered to push the center pressure rod toward the expansion body, causing the expansion body to expand under pressure to press the valve stem hole of the hemisphere, thereby realizing the positioning of the hemisphere on the clamping fixture. By positioning the hemisphere on the clamping fixture, the hemisphere is fully ground under the joint action of the rotary drive component and the transverse axis unit. Although the hemisphere is achieved The purpose of fully grinding the body under automation is achieved, but there are still defects. First, the structure of the clamping tool is complicated, and there are many steps to position the hemisphere on the clamping tool, which is not conducive to the quick disassembly and assembly of the hemisphere; second, unnecessary collisions occur during disassembly and assembly, such as the valve stem hole of the hemisphere and the expansion body are misaligned, resulting in the expansion body being unable to be smoothly inserted into the valve stem hole, causing damage between the end of the expansion body and the inner wall of the hemisphere, or when there is no one to support the hemisphere and the expansion body moves towards each other, it is easy for the hemisphere to separate from the expansion body and then fall under gravity. The expansion bodies on the two bracket seats are not coaxial. The above two situations will affect the state of the hemisphere on the clamping tool, resulting in the phenomenon of poor subsequent grinding effect. Fourthly, the expansion body is stretched and bent outward, and the bending degree of each part is not uniform, resulting in a decrease in the clamping effect of the expansion body on the valve stem hole. The hemisphere is prone to vibration or slight movement during the grinding process, resulting in poor grinding effect. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of the utility model is to provide a spherical CNC grinding processing center that is easy to disassemble and assemble a hemisphere, has reliable clamping and high grinding precision.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a spherical CNC grinding processing center for facilitating the disassembly and assembly of a hemisphere, comprising a clamping tool, a turntable for carrying the clamping tool, a turntable driving member for driving the turntable to rotate, and a transverse rotation axis unit for driving the turntable to swing, wherein the transverse rotation axis unit comprises a rotating plate located between the turntable and the turntable driving member, the turntable is coaxially provided with a rotating drum penetrating the rotating plate and connected to the turntable driving member, the clamping tool comprises a shaft body coaxially provided with the turntable and positioned above the turntable, a shaft penetrating the shaft body in the direction of the shaft body diameter and movable in the direction of the shaft body axis The cam is provided with a movable positioning rod, a tray which is sleeved outside the shaft and can carry the hemisphere, a top piece which is coaxial with the shaft and can move along the axis of the shaft, a supporting piece which is coaxially positioned on the top piece and both ends of which are located below the tray, a main pushing piece which is located inside the rotating drum and is used to drive the top piece to move upward, an adapter which is partially inserted into the rotating drum, and a rotary joint which is connected to the other end of the adapter and is connected to an external oil pipe, the two ends of the positioning rod can be respectively inserted into the two valve stem holes of the hemisphere, and oil is introduced into the rotating drum through the rotary joint so that the main pushing piece drives the top piece to drive the supporting piece to push the tray upward, so that the positioning rod and the tray jointly clamp the hemisphere.

[0006] As a further improvement of the present invention, the rotary drive component includes a driven wheel coaxially connected to the rotating drum and positioned at one end of the rotating drum, a driving wheel positioned on one side of the driven wheel and capable of being connected to the driven wheel, and a driver for driving the driving wheel to rotate and not interfering with the rotary joint.

[0007] As a further improvement of the present invention, the outer shell of the rotating drum is provided with an easily detachable part that can be partially inserted into the rotating flat plate, and a bearing is provided between the easily detachable part and the rotating drum.

[0008] As a further improvement of the present invention, the hole in the shaft body for the positioning rod to penetrate is arc-shaped away from the inner wall of the turntable.

[0009] As a further improvement of the present invention, the ends of the main pushing member and the pushed member facing each other are respectively provided with an inserting block and a slot that can be plugged into each other.

[0010] The beneficial effects of the utility model are as follows: oil is introduced into the rotating drum through the rotary joint so that the main pushing part drives the supporting part to push the tray upward, so that the positioning rod and the tray jointly clamp the hemisphere. Compared with the existing technology, this design simplifies the structure and disassembly steps of the clamping tool used to clamp the hemisphere, and effectively improves the disassembly and assembly efficiency; the positioning rod is simultaneously inserted into the valve stem holes at both ends of the hemisphere so that the hemisphere is accurately positioned in the horizontal direction, which makes up for the defect of the existing technology that easily causes the hemisphere to tilt, directly improves the clamping reliability of the hemisphere on the tray, and indirectly improves the grinding accuracy of the hemisphere. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0012] Figure 2 A three-dimensional diagram of the clamping fixture, the rotating member, the rotating drive member and the transverse axis unit of the present invention assembled together and clamping a hemisphere;

[0013] Figure 3 for Figure 2 A partially cutaway perspective view after the positioning rod and hemisphere are removed;

[0014] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0015] Reference numerals: 1. Clamping fixture; 11. Shaft; 12. Positioning rod; 13. Tray; 14. Top member; 141. Slot; 15. Support; 16. Main push member; 161. Insert; 17. Adapter; 18. Rotary joint; 2. Rotary plate; 21. Rotating drum; 3. Rotary driving member; 31. Driven wheel; 32. Driving wheel; 33. Driver; 4. Horizontal axis unit; 41. Rotating plate; 5. Removable parts; 6. Bearing; DETAILED DESCRIPTION

[0016] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments, wherein the same components are denoted by the same reference numerals.

[0017] Reference Figures 1 to 4 As shown, a spherical CNC grinding and machining center for easily assembling and disassembling a hemispherical object according to this embodiment includes a clamping tool 1, a rotary disk 2 for carrying the clamping tool 1, a rotary drive member 3 for driving the rotary disk 2 to rotate, and a transverse axis unit 4 for driving the rotary drive member 3 to swing. The transverse axis unit 4 includes a rotating plate 41 located between the rotary disk 2 and the rotary drive member 3. The rotary disk 2 and the rotating plate 41 are rotatably connected.

[0018] Based on the aforementioned prior art, the turntable 2 is integrally formed with a rotating drum 21 coaxial therewith. The center of the turntable 2 is hollowed out and connected to the inner cavity of the rotating drum 21. A connecting hole is provided on the end of the rotating drum 21 away from the turntable 2. The clamping tool 1 includes an axle body 11, a positioning rod 12, a tray 13, a top piece 14, a support piece 15, a main pushing piece 16, an adapter 17 and a rotating joint 18. A connecting disk is integrally formed at one end of the axle body 11. The axle body 11 is provided with a rod hole and a moving hole distributed along the length direction of the axle body 11. Both ends of the rod hole and the moving hole are located in the diameter direction of the axle body 11. The center of the connecting disk is hollowed out and connected to the moving hole. The rod hole is for the positioning rod 12 to pass through, and the moving hole is for the top piece 14 to accommodate and for the support piece 15 to pass through. The positioning rod 12 is cylindrical and its diameter Matching the inner diameter of the valve stem hole of the hemisphere, the tray 13 is a ring body and its inner diameter is adapted to the diameter of the shaft body 11. The outer diameter of the tray 13 is larger than the maximum distance between the two ends of the hemisphere. The top member 14 is a stepped rod with different profile sizes at both ends. A through hole is opened in the center of the bracket 15 for the end with the smaller diameter of the stepped rod to pass through. The length of the bracket 15 is larger than the diameter of the shaft body 11. The main push member 16 can be a piston or a single-line hydraulic cylinder. The adapter 17 adopts the existing technology. The rotary joint 18 adopts the existing hydraulic rotary joint. The output end of the rotary joint 18 can rotate relative to the main body. The rotary drive member 3 includes a driven wheel 31, a driving wheel 32 and a driver 33. The driver 33 can adopt a rotary motor. The driving wheel 32 and the driven wheel 31 can be connected together by a belt drive or a chain drive.

[0019] During the assembly process, the main pushing member 16 is installed in the inner cavity of the rotating drum 21, and then the top member 14 is placed at the upward end of the main pushing member 16. Then the connecting disk at the end of the shaft body 11 is fitted with the end face of the rotary disk 2 and fixed together with bolts. The shaft body 11 is positioned on the rotary disk 2 and the end with the smaller diameter of the top member 14 is inserted into the moving hole of the shaft body 11. Then the supporting member 15 is passed through the moving hole along the diameter direction of the shaft body 11 and the supporting member 15 is sleeved on the outside of the smaller diameter part of the top member 14. The supporting member 15 contacts the stepped surface of the top member 14, and the tray 13 is sleeved on the outside of the shaft body 11 from top to bottom and contacts the supporting member 15. Then the aforementioned assembled whole is rotatably connected to the rotating plate 41, and the rotating drum 21 passes through the rotating plate 4 1. The driven wheel 31 is fixedly sleeved from bottom to top on the outside of the end of the rotating drum 21 located below the rotating plate 41. The driven wheel 31 is connected to the end of the rotating drum 21 by a gasket, and the gasket limits the driven wheel 31 between the rotating plate 41 and the gasket. The driving wheel 32 is positioned on the output shaft of the driver 33, and the driver 33 is positioned below the rotating plate 41 through a connecting frame, etc. The driving wheel 32 is located on one side of the driven wheel 31, and the driving wheel 32 and the driven wheel 31 are connected by a belt drive. One end of the adapter 17 is passed through the gasket and sealed with the hole on the end surface of the rotating drum 21. The output end of the rotary joint 18 is fixedly connected and sealed to the end of the adapter 17 located below the gasket. The oil inlet and outlet holes on the peripheral wall of the rotary joint 18 are externally piped.

[0020] During use, the hemisphere is placed on the tray 13 and the valve stem holes on both ends of the hemisphere are in the same straight line with the rod hole on the shaft body 11. Then the positioning rod 12 is inserted into the two valve stem holes and the rod hole at the same time. There is a gap between the positioning rod 12 and the inner wall of the top of the rod hole. Then, oil is transported to the rotary joint 18 through the pipeline. The oil flows through the rotary joint 18 and the adapter 17 into the rotating cylinder 21. If the main pusher 16 is a piston as a whole, the main pusher 16 moves upward relative to the inner cavity of the rotating cylinder 21. If the main pusher 16 is a piston, the main pusher 16 moves upward relative to the inner cavity of the rotating cylinder 21. The pusher 16 is a single-line hydraulic cylinder, which is fixedly connected to the inner cavity of the drum 21. The oil entering the drum 21 will enter the inner cavity of the single-line hydraulic cylinder and make the output shaft of the single-line hydraulic cylinder move upward. The two forms of the main pusher 16 can push the top member 14 upward. The top member 14 drives the supporting member 15, the tray 13, the hemisphere and the positioning rod 12 to move upward relative to the shaft body 11 until the positioning rod 12 touches the inner wall of the top of the rod hole. Then the tray 13 and the positioning rod 12 are moved upward. The hemisphere is clamped together and fixed relative to the shaft 11. Finally, the driver 33 drives the driven wheel 31 to rotate through the driving wheel 32. The driven wheel 31 drives the rotating drum 21, the gasket, the adapter 17, the output end of the rotary joint 18, the turntable 2, the shaft 11, the main pusher 16, the top member 14, the support 15, the tray 13, the positioning rod 12 and the hemisphere as a whole to rotate relative to the rotating plate 41. The main part of the rotary joint 18 and the external pipe are fixed relative to the rotating plate 41. The horizontal axis unit The rotating plate 41 drives the clamping fixture 1, the rotary disk 2, the rotating drum 21, and the rotary drive member 3 to swing as a whole. If the hemisphere needs to be removed, the oil supply is stopped and the oil in the rotating drum 21 is discharged from the rotating drum 21 through the pipeline connected to the oil outlet. Then, the main pushing member 16, the supporting member 14, the supporting member 15, the tray 13, the hemisphere, and the positioning rod 12 all move downward as a whole. The positioning rod 12 and the tray 13 are loosened relative to the hemisphere, and the positioning rod 12 and the hemisphere on the tray 13 can be removed successively.

[0021] Compared with the existing technology, this design simplifies the structure and disassembly and assembly steps of the clamping tool 1 for clamping the hemisphere, effectively improving the disassembly and assembly efficiency; the positioning rod 12 is simultaneously inserted into the valve stem holes at both ends of the hemisphere to accurately position the hemisphere in the horizontal direction, compensating for the defect of the existing technology that easily causes the hemisphere to tilt, directly improving the clamping reliability of the hemisphere on the tray 13, and indirectly improving the grinding accuracy of the hemisphere.

[0022] As a specific embodiment of the improvement, refer to Figure 3As shown, an easily detachable part 5 is provided on the outer cover of the rotating drum 21, which can be partially inserted into the rotating flat plate 41. The easily detachable part 5 is fixed relative to the rotating flat plate 41, and a bearing 6 is provided between the easily detachable part 5 and the rotating drum 21. The design of the bearing 6 can improve the smoothness of the rotation of the rotating drum 21 relative to the easily detachable part 5; the design of the easily detachable part 5 can make up for the defect that it is difficult to disassemble after the bearing 6 is directly provided between the rotating flat plate 41 and the rotating drum 21. The clamping tool 1, turntable 2, rotating drum 21, bearing 6 and easily detachable part 5 can be easily and conveniently removed from the rotating flat plate 41 as a whole, which is convenient for subsequent maintenance or replacement of the overall structure of the clamping tool 1, turntable 2, rotating drum 21, bearing 6 and easily detachable part 5.

[0023] As a specific embodiment of the improvement, refer to Figure 3 As shown, the rod hole of the shaft 11 for the positioning rod 12 to pass through is in an arc shape away from the inner wall of the turntable 2. Compared with the design in which the inner wall of the top end of the rod hole on the shaft 11 is made flat, such a design can fine-tune the position of the hemisphere on the horizontal plane, ensuring that the position of the hemisphere on the tray 13 is unique, so that the hemisphere can be effectively ground subsequently, further improving the grinding accuracy of the hemisphere surface.

[0024] As a specific embodiment of the improvement, refer to Figure 4 As shown, the ends of the main pushing member 16 and the top member 14 facing each other are respectively provided with an insert block 161 and a slot 141 that can be plugged into each other. Such a design can ensure that the top member 14 is fixed in position on the end of the main pushing member 16, avoiding the top member 14 from being translated relative to the main pushing member 16 during the assembly or clamping process and being subjected to uneven force, which may cause the top member 14 to break, and indirectly ensure that the tray 13 supported by the support member 15 remains horizontal, thereby ensuring that the hemisphere can be effectively ground and have a high grinding accuracy.

[0025] The above are only preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A spherical CNC grinding and machining center for facilitating the assembly and disassembly of a hemispherical body, comprising a clamping fixture (1), a rotary disk (2) for carrying the clamping fixture (1), a rotary drive member (3) for driving the rotary disk (2) to rotate, and a transverse axis unit (4) for driving the rotary drive member (3) to swing, wherein the transverse axis unit (4) comprises a rotating plate (41) located between the rotary disk (2) and the rotary drive member (3), and is characterized in that: The rotary disk (2) is coaxially provided with a rotating drum (21) which passes through the rotating plate (41) and is connected to the rotary driving member (3); the clamping tool (1) comprises a shaft (11) coaxially provided with the rotary disk (2) and positioned above the rotary disk (2); a positioning rod (12) which can pass through the shaft (11) along the diameter direction of the shaft (11) and can move along the axis direction of the shaft (11); a tray (13) which is sleeved outside the shaft (11) and can carry a hemisphere; a supporting member (14) coaxially provided with the shaft (11) and can move along the axis direction of the shaft (11); a supporting member (14) coaxially positioned on the supporting member (14) and with both ends located on the supporting member (13); A supporting member (15) is provided below the disc (13), a main pushing member (16) is located inside the rotating cylinder (21) and is used to drive the top member (14) to move upward, an adapter (17) partially inserted into the rotating cylinder (21), and a rotary joint (18) connected to the other end of the adapter (17) and connected to an external oil pipe. The two ends of the positioning rod (12) can be respectively inserted into the two valve stem holes of the hemisphere. Oil is introduced into the rotating cylinder (21) through the rotary joint (18), so that the main pushing member (16) drives the top member (14) to drive the supporting member (15) to push the tray (13) upward, so that the positioning rod (12) and the tray (13) jointly clamp the hemisphere.

2. The spherical CNC grinding and machining center for easily disassembling a hemispherical body according to claim 1, characterized in that: The rotary drive member (3) comprises a driven wheel (31) coaxially connected to the rotating drum (21) and positioned at one end of the rotating drum (21), a driving wheel (32) positioned at one side of the driven wheel (31) and capable of being transmission-connected to the driven wheel (31), and a driver (33) for driving the driving wheel (32) to rotate and not interfering with the rotary joint (18).

3. A spherical CNC grinding and machining center for easily disassembling a hemispherical body according to claim 1 or 2, characterized in that: The outer shell of the rotating drum (21) is provided with an easily detachable part (5) that can be partially inserted into the rotating flat plate (41), and a bearing (6) is provided between the easily detachable part (5) and the rotating drum (21).

4. A spherical CNC grinding and machining center for easily disassembling a hemispherical body according to claim 1 or 2, characterized in that: The hole of the shaft body (11) for the positioning rod (12) to penetrate is in an arc shape away from the inner wall of the rotary disk (2).

5. A spherical CNC grinding and machining center for easily disassembling a hemispherical body according to claim 1 or 2, characterized in that: An inserting block (161) and a slot (141) which can be plugged into each other are respectively provided at the ends of the main pushing member (16) and the supporting member (14) facing each other.

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