Valve seat and valve core spherical sealing surface grinding device

Abstract

The present invention discloses a spherical sealing surface grinding device for a valve seat and valve core, comprising: a moving member capable of transverse reciprocating movement; a rocking mechanism comprising a platform and two springs, the platform being rotatably supported on the moving member about a rotation axis, the rotation axis being perpendicular to the moving direction of the moving member and extending transversely, the springs being symmetrically arranged on both sides of the rotation axis and acting on the platform to keep the platform balanced; a first clamping member having a first clamping position facing upward, the first clamping member being supported on the platform and being capable of rotational movement about a first longitudinal axis coaxial with the first clamping position; a second clamping member having a second clamping position facing downward, the second clamping member being arranged so that the second clamping position can be moved close to the first clamping position above and opposite to and maintained with the first clamping position, and the second clamping member being configured to be capable of rotational movement about a second longitudinal axis coaxial with the second clamping position. The device of the present invention is fully and comprehensively ground, has low cost, and is easy to promote.

Description

Technical Field

[0001] The invention relates to the field of mechanical processing, and in particular to a grinding device for a spherical sealing surface of a valve seat or valve core. Background Art

[0002] For valve seats and valve cores with spherical mating surfaces, after the spherical surface machining is completed, the spherical surfaces of the valve seat and valve core need to be ground together to eliminate the matching clearance caused by the small errors in the spherical surface machining. The traditional grinding method is to fix the valve seat (or valve core), manually press and rotate the valve core (or valve seat) to make the two spherical surfaces grind relative to each other to remove excess material. The disadvantage of the existing technology is that it is inefficient, and pressing the valve seat or valve core for a long time will consume a lot of workers' physical strength. Summary of the invention

[0003] In view of the defects of the prior art, the present invention provides a valve seat and valve core spherical sealing surface grinding device, the device comprising:

[0004] A moving member, configured to be capable of lateral reciprocating movement;

[0005] A rocking mechanism comprises a platform and at least two springs, wherein the platform is rotatably supported on the moving member about a rotation axis, the rotation axis is perpendicular to the moving direction of the moving member and extends laterally, and the springs are symmetrically arranged on both sides of the rotation axis and act on the platform to keep the platform balanced;

[0006] a first clamping member having a first clamping position facing upward, the first clamping member being supported on the platform and capable of pivoting movement about a first longitudinal axis coaxial with the first clamping position; and

[0007] A second clamping member has a second clamping position facing downward, the second clamping member is configured so that the second clamping position can be moved close to the top of the first clamping position and relative to and maintained at the first clamping position, and the second clamping member is also configured to be able to perform rotational movement about a second longitudinal axis coaxial with the second clamping position.

[0008] The beneficial effect of this embodiment is that the valve seat and valve core spherical sealing surface grinding device disclosed in the present invention utilizes the object clamped by the second clamping member whose position remains unchanged to exert a force on the object clamped by the moving first clamping member, so as to tilt the object clamped by the second clamping member, and adjust the grinding position between the two objects in all directions, so that the grinding is more in place and comprehensive. Another major advantage of the present invention is its low cost and low manufacturing difficulty. Users can assemble it by themselves without entrusting a special machine manufacturer. The above advantages of the valve seat and valve core spherical sealing surface grinding device disclosed in the present invention make it easier to promote and apply.

[0009] In some embodiments, a base is further included, and a movable member is slidably connected to the base. The bottom of the movable member has a plurality of sliders, and a guide rail is provided on the upper row of the base. The sliders are slidably connected to the guide rails. The movable member is driven to slide on the base by a first servo motor and a precision screw.

[0010] In some embodiments, the movable member structure includes a bottom plate and two first side plates arranged on the bottom plate, and two second side plates are arranged at the bottom of the platform. The second side plates are pivotally connected to the first side plates, and the two pivot points define the rotation axis of the platform.

[0011] In some embodiments, the first clamping member is a three-jaw chuck, and a second servo motor is provided below the translation to drive the three-jaw chuck to rotate.

[0012] In some embodiments, the spring applies a supporting force or a pulling force to the platform.

[0013] In some embodiments, the second clamping member is fixed on a motor shaft of a third servo motor, the third servo motor is disposed on a mounting seat, the mounting seat is connected to a cylinder, and the cylinder drives the second clamping member to perform lifting motion.

[0014] In some embodiments, the second clamping member is mounted on a drill shaft of a drilling machine, and the drill shaft drives the second clamping member to perform lifting and rotating movements.

[0015] In some embodiments, the bottom of the platform and the upper surface of the base are respectively provided with grooves, and the upper and lower ends of the spring are respectively disposed in the grooves. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of a spherical sealing surface grinding device for a valve seat and valve core according to one embodiment of the present invention.

[0017] Figure 2 It is a side view of a valve seat and valve core spherical sealing surface grinding device according to one embodiment of the present invention.

[0018] Figure 3 It is a perspective view of an assembly of a base, a moving member, a swing member, and a first clamping member of a valve seat and valve core spherical sealing surface grinding device according to an embodiment of the present invention.

[0019] Figure 4 It is a schematic diagram of a valve seat and valve core spherical sealing surface grinding device for a valve seat and valve core in preparation for grinding according to an embodiment of the present invention.

[0020] Figure 5 It is a schematic diagram of a state in a process of grinding a valve seat and valve core by a valve seat and valve core spherical sealing surface grinding device according to an embodiment of the present invention.

[0021] Explanation of symbols:

[0022] Moving member 1, swing mechanism 2, first clamping member 3, second clamping member 4, base 5, guide rail 6, slider 7, first servo motor 8, bottom plate 9, first side plate 10, platform 11, spring 12, rotation axis 13, second side plate 14, first clamping position 15, first longitudinal axis 16, second servo motor 17, second clamping position 18, second longitudinal axis 19, third servo motor 20, mounting seat 21, cylinder 22, valve seat 23, concave spherical surface 24, valve core 25, convex spherical surface 26 DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0024] Please refer to Figure 1-3 The valve seat and valve core spherical sealing surface grinding device includes a moving component 1, a swing mechanism 2, a first clamping component 3 and a second clamping component 4.

[0025] The moving member 1 is configured to be able to move back and forth laterally. For example, please refer to 1-2, the moving member 1 is slidably arranged on a base 5, two parallel guide rails 6 are arranged on the base 5, and a plurality of sliders 7 are arranged at the bottom of the moving member 1, and the sliders 7 are slidably connected to the guide rails 6. A precision lead screw is also arranged at the bottom of the moving member 1, and a first servo motor 8 is arranged at one end of the precision lead screw. When the first servo motor 8 rotates forward or reversely, the moving member 1 is driven by the precision lead screw to slide along the extension direction of the guide rails 6 on the base 5.

[0026] Please refer to Figure 2 The moving member 1 may specifically include a bottom plate 9 and two first side plates 10 respectively arranged at both ends of the bottom plate 9. The slider 7 and the precision lead screw may be arranged at the bottom of the bottom plate 9.

[0027] Please refer to Figure 1 The rocking mechanism 2 comprises a platform 11 and at least two springs 12. The platform 11 is rotatably supported on the moving member 1 about a rotation axis 13, wherein the rotation axis 13 is perpendicular to the moving direction of the moving member 1 and extends transversely. The springs 12 are symmetrically arranged on both sides of the rotation axis 13 and act on the platform 11 to keep the platform 11 balanced.

[0028] Please refer to Figure 2 The platform 11 can be a flat plate, and second side panels 14 are respectively provided at both ends of the bottom of the platform 11. The two first side panels 10 are pivotally connected to the two second side panels 14 respectively. The two pivot points define a rotation axis 13 of the platform 11, and the rotation axis 13 extends laterally perpendicular to the moving direction of the movable member 1.

[0029] Please refer to Figure 1 and Figure 2The spring 12 is vertically arranged below the platform 11, one end of which is connected to the platform 11, and the other end can be connected to the bottom plate 9 of the mobile member 1. Specifically, the bottom surface of the platform 11 and the upper surface of the bottom plate 9 are respectively provided with grooves, and the two ends of the spring 12 are placed in the grooves to limit the two ends of the spring. When the device is not started, the platform 11 is kept in a horizontal state by the action of the springs 12 on both sides. The spring 12 can be in a compressed state to apply a supporting force to the platform 11, or it can be in a stretched state to apply a pulling force to the platform 11.

[0030] Please combine Figure 1-3 The first clamping member 3 has a first clamping position 15 facing upward. The first clamping member 3 is supported on the platform 11 and can perform rotational motion about a first longitudinal axis 16 coaxial with the first clamping position 15. For example, a chuck can be selected as the first clamping member 3. A chuck is a mechanical device used to clamp workpieces on machine tools and is widely used in machines such as lathes, external cylindrical grinders and internal cylindrical grinders. The jaws of the chuck can move centripetally, that is, toward the first clamping position 15, and can clamp the object placed in the first clamping position 15. In addition to the chuck type, the first clamping member 3 can also be a centering type, a collet type, an angle iron type or a disk type.

[0031] The first clamping member 3 is supported in the middle of the platform 11, specifically located directly above the rotation axis 13. Figure 2 A second servo motor 17 is provided below the platform 11, and the second servo motor 17 can drive the first clamping member 3 to perform a rotational motion.

[0032] Please combine Figure 1-2 , the second clamping member 4 has a second clamping position 18 facing downward, the second clamping member 4 is configured so that the second clamping position 18 can be moved close to the first clamping position 15 and relative to and maintained above the first clamping position 15, and the second clamping member 4 is also configured to be able to perform a rotational motion about a second longitudinal axis 19 coaxial with the second clamping position 18. For example, the second clamping member 4 is configured to be able to clamp an object for rotational motion and can be lifted and lowered above the first clamping member 3. In some embodiments, the second clamping member 4 is fixed to the motor shaft of a third servo motor 20, and the third servo motor 20 is arranged on a mounting seat 21, and the mounting seat 21 is connected to a cylinder 22, which is driven to lift and lower. Of course, the lifting and lowering of the second clamping member 4 can also be driven by a driving mechanism composed of a motor, a precision screw, a guide rail, and a slider. The second clamping member 4 can be a centering type, a chuck type, a chuck type, an angle iron type, or a faceplate type. In some embodiments, a drill spindle of an existing machine such as a drilling machine can be used as the second clamping member 4, and the drilling machine has a rotating mechanism and a lifting mechanism.

[0033] Please combine Figure 4 and Figure 5, assuming that the valve seat 23 has a concave spherical surface 24, the valve seat 23 is clamped at the first clamping position 15, and the concave spherical surface 24 faces upward, the valve core 25 has a convex spherical surface 26, the valve core 25 is clamped at the second clamping position 18, and the convex spherical surface 26 faces downward. Move the second clamping member 4 so that the convex spherical surface 26 of the valve core 25 falls into the concave spherical surface 24 of the valve seat 23, keep the first longitudinal axis 16 coincident or substantially coincident with the second longitudinal axis 19, and make the convex spherical surface 26 apply a downward pressure to the concave spherical surface 24. During the grinding process, keep the position of the second clamping member 4 stationary. The first clamping member 3 and the second clamping member 4 rotate in opposite directions respectively, and the concave spherical surface 24 and the convex spherical surface 26 grind against each other. The first servo motor 8 periodically rotates forward and reverse, so that the valve seat 23 clamped on the first clamping member 3 can reciprocate laterally within a certain range. When the first clamping member 3 moves laterally, the valve seat 23 is obstructed by the valve core 25, causing the platform 11 and the first clamping member 3 to tilt, and a deflection angle is formed between the first longitudinal axis 16 and the second longitudinal axis 19. Correspondingly, the valve seat 23 will also tilt, which can change the grinding position and make the grinding between the concave spherical surface 24 and the convex spherical surface 26 more complete.

[0034] The valve seat and valve core spherical sealing surface grinding device disclosed in the present invention utilizes the object clamped by the second clamping member 4 whose position remains unchanged to exert a force on the object clamped by the moving first clamping member 3, so as to tilt the object clamped by the second clamping member, and adjust the grinding position between the two objects in all directions, so that the grinding is more in place and comprehensive. Another major advantage of the present invention is its low cost and low manufacturing difficulty. Users can assemble it by themselves without entrusting a special machine manufacturer. The above advantages of the valve seat and valve core spherical sealing surface grinding device disclosed in the present invention make it easier to promote and apply.

[0035] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. The valve seat and valve core spherical sealing surface grinding device is characterized by: include: A moving member, configured to be capable of lateral reciprocating movement; A rocking mechanism, comprising a platform and at least two springs, wherein the platform is rotatably supported on the moving member about a rotation axis, the rotation axis is perpendicular to the moving direction of the moving member and extends laterally, and the springs are symmetrically arranged on both sides of the rotation axis and act on the platform to keep the platform balanced; a first clamping member having a first clamping position facing upward, the first clamping member being supported on the platform and capable of pivoting about a first longitudinal axis coaxial with the first clamping position; as well as a second clamping member having a second clamping position facing downward, the second clamping member being configured so that the second clamping position can be moved close to above the first clamping position and opposite to and held at the first clamping position, and the second clamping member is further configured to be capable of rotational movement about a second longitudinal axis coaxial with the second clamping position; It also includes a base, the moving member is slidably connected to the base, the bottom of the moving member has a plurality of sliders, the upper row of the base is provided with a guide rail, the slider is slidably connected to the guide rail, and the moving member is driven to slide on the base by a first servo motor and a precision lead screw; The movable member structure comprises a bottom plate and two first side plates arranged on the bottom plate. Two second side plates are arranged at the bottom of the platform. The second side plates are pivotally connected to the first side plates. The two pivot points define the rotation axis of the platform.

2. The valve seat and valve core spherical sealing surface grinding device according to claim 1 is characterized in that: The first clamping member is a three-jaw chuck, and a second servo motor for driving the three-jaw chuck to rotate is provided under the platform.

3. The valve seat and valve core spherical sealing surface grinding device according to claim 1 is characterized in that: The spring applies a supporting force or a pulling force to the platform.

4. The valve seat and valve core spherical sealing surface grinding device according to claim 1 is characterized in that: The second clamping member is fixed on the motor shaft of a third servo motor, and the third servo motor is arranged on a mounting seat. The mounting seat is connected to a cylinder, and the cylinder drives the second clamping member to perform lifting motion.

5. The valve seat and valve core spherical sealing surface grinding device according to claim 1 is characterized in that: The second clamping member is installed on a drill shaft of a drilling machine, and the drill shaft drives the second clamping member to move up and down and rotate.

6. The valve seat and valve core spherical sealing surface grinding device according to claim 1, characterized in that: The bottom of the platform and the upper surface of the base are respectively provided with grooves, and the upper and lower ends of the spring are respectively arranged in the grooves.

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