CN219358701U - Machining clamp for clamping valve rod - Google Patents
Machining clamp for clamping valve rod Download PDFInfo
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- CN219358701U CN219358701U CN202320504086.6U CN202320504086U CN219358701U CN 219358701 U CN219358701 U CN 219358701U CN 202320504086 U CN202320504086 U CN 202320504086U CN 219358701 U CN219358701 U CN 219358701U
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- counter bore
- rod
- lower shaft
- upper clamping
- clamp
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The utility model relates to the field of valve production, in particular to a machining clamp for clamping a valve rod, which comprises an upper clamping body and a lower shaft body, wherein the upper clamping body and the lower shaft body are integrally formed, the diameter of the upper clamping body is larger than that of the lower shaft body, the upper clamping body and the lower shaft body keep coaxiality, an inner counter bore for accommodating the valve rod is arranged in the upper clamping body and the lower shaft body, the inner counter bore extends downwards along an axis from the upper plane of the upper clamping body, when the rod body is placed in the inner counter bore, the rod head is exposed out of the inner counter bore, and when the rod head is placed in the inner counter bore, the rod body and the transition step are exposed out of the inner counter bore. The embedded assembly of the upper clamping body, the inner clamp and the rod body sleeve is designed, the special-shaped valve rod can be assembled in the clamp convenient for the three-jaw chuck to clamp, the clamping time of turning is reduced, the clamp is simple in structure, rapid in assembly and convenient to clamp, and belongs to a special tool clamp of the valve rod, and high-precision turning of the valve body is facilitated.
Description
Technical Field
The utility model relates to the field of valve production, in particular to a machining clamp for clamping a valve rod.
Background
The valve is a pipeline accessory for opening and closing a pipeline, controlling the flow direction, adjusting and controlling parameters (temperature, pressure and flow rate) of a conveying medium. Depending on their function, they can be classified into shutoff valves, check valves, regulating valves, etc.
The valve is a control component in the fluid transportation system and has the functions of stopping, adjusting, guiding, preventing countercurrent, stabilizing pressure, shunting or overflow pressure relief and the like. Valves for fluid control systems range from the simplest shut-off valves to the various valves used in extremely complex automatic control systems, which are quite diverse in variety and specification. The valve can be used for controlling the flow of various types of fluids such as air, water, steam, various corrosive media, slurry, oil products, liquid metal, radioactive media and the like.
The brass valve is cast by a die after die opening, and the die casting precision is not high, so that later turning is needed to carry out turning on the assembly port of the parts so as to meet the high-precision assembly requirement.
The valve rod of the pressure reducing valve shown in fig. 1 is in a T-shaped shape, is a special-shaped part, the rod head part of the valve rod needs turning finish machining, the rod part of the valve rod is too thin, the three-jaw chuck of a lathe is not facilitated to clamp, the direct clamping is not only unstable, but also the rod part is easy to break or deform, and therefore a fixture clamp convenient for clamping the valve rod to carry out turning machining needs to be designed.
Disclosure of Invention
In order to solve the technical problems, the utility model aims to provide a machining clamp for clamping a valve rod, which is convenient for clamping the valve rod for turning.
In order to achieve the above object, the technical scheme of the present utility model is as follows:
the machining fixture for clamping the valve rod mainly comprises a disc-shaped rod head and a rod body which are integrally cast, wherein the rod head and the rod body are T-shaped, a transition ladder is arranged at the joint of the rod body and the rod head,
the machining fixture comprises an upper clamping body and a lower shaft body, wherein the upper clamping body and the lower shaft body are integrally formed, the diameter of the upper clamping body is larger than that of the lower shaft body, coaxiality is kept between the upper clamping body and the lower shaft body, an inner counter bore for accommodating a valve rod is formed in the upper clamping body and the lower shaft body, the inner counter bore extends downwards along an axis from the upper plane of the upper clamping body, when the rod body is placed in the inner counter bore, the rod head is exposed out of the inner counter bore, and when the rod head is placed in the inner counter bore, the rod body and the transition step are exposed out of the inner counter bore.
Preferably, the detachable rod body sleeve is embedded in the inner counter bore, the rod body sleeve is divided into a left half bud sleeve and a right half bud sleeve which are symmetrically designed and can be opened and closed, the left half bud sleeve and the right half bud sleeve are enclosed to form a hollow cylindrical shape, a stepped through hole for accommodating the rod body and the transition step is formed in the middle of the left half bud sleeve and the right half bud sleeve when the left half bud sleeve and the right half bud sleeve are enclosed, and the stepped through hole and the inner counter bore keep coaxiality.
Preferably, the height of the inner counter bore is equal to or greater than the height of the rod body sleeve.
Preferably, the inner counter bore is a stepped counter bore, the uppermost step of the stepped bore is close to the upper plane of the upper clamping body, the diameter of the stepped bore is larger than or equal to that of the club head, and the lowermost step of the stepped bore penetrates into the lower shaft body.
Preferably, an inner clamp is embedded in the uppermost stage of stepped hole, the inner clamp is divided into a left bud and a right bud which are symmetrically designed and can be opened and closed, the left bud and the right bud are enclosed into a hollow cylindrical shape, when the left bud and the right bud are enclosed, a club head counter bore is formed in the middle, the club head counter bore and the inner counter bore keep coaxiality, the opening direction of the club head counter bore faces to the upper plane of the upper clamping body, and the club head is embedded in the club head counter bore.
Preferably, the height of the inner clamp is higher than that of the club head, the height of the club head counter bore is lower than that of the whole inner clamp, and when the inner clamp is placed in the uppermost stage stepped hole of the inner counter bore, the upper plane of the inner clamp and the upper plane of the upper clamping body are kept at the same plane, and the club body and the transition step of the inner clamp are exposed out of the club head counter bore.
Preferably, the internal counterbore extends from the upper planar surface of the upper clamp body down along the axis into the lower shaft body and has a diameter within the upper clamp body that is greater than a diameter within the lower shaft body.
Preferably, the center of the circle of the upper clamping body and the center of the circle of the lower shaft body are used as the center, a cross-shaped crack opening is formed in the X, Y direction of the upper clamping body and the lower shaft body, and the length of the crack opening exceeds the height of the upper clamping body along the axial direction of the upper clamping body and the lower shaft body, but does not exceed the lower end of the lower shaft body. The function of the crack opening is to enable the upper clamping body to deform, so that the inner clamp and the rod body sleeve can be conveniently taken out and placed, the three-jaw chuck of the lathe clamps the clamp, the crack opening is naturally tightened, the inner clamp and the rod body sleeve are tightly clamped, and the rod body or the rod head inside can be subjected to turning processing with coaxiality kept under high-speed operation, so that eccentricity and swing are avoided.
The beneficial effect that above design compares with prior art is:
the valve rod belongs to special-shaped parts, the clamping of the turning machine is inconvenient, the embedded assembly of the upper clamping body, the inner clamp and the rod body sleeve is designed, the special-shaped valve rod can be assembled in the clamp convenient for the clamping of the three-jaw chuck, the clamping time of turning is reduced, the clamp structure is simple, the assembly is quick, the clamping is convenient, the special tool clamp belongs to the valve rod, and the high-precision turning of the valve body is convenient.
The detachable inner clamp and the rod body sleeve are designed in an embedded mode, the rod body is clamped, the rod head is conveniently exposed to be turned, then the upper clamping body and the lower shaft body are universal, the upper clamping body can be universal, the inner clamp can be embedded, the rod body sleeve can also be embedded, and therefore, when the valve rod is machined, the clamp is universal, and cost is saved.
Drawings
FIG. 1 is a schematic cross-sectional view of a valve stem.
FIG. 2 is a schematic cross-sectional view of a machining fixture according to an embodiment;
FIG. 3 is a schematic diagram showing a front view of a rod sleeve according to an embodiment assembled in a machining fixture;
FIG. 4 is a schematic top view of an embodiment in which a rod sleeve is mounted in a machining fixture;
FIG. 5 is a schematic cross-sectional view of a second embodiment machining fixture;
FIG. 6 is a schematic diagram showing a front view of the inner jig of the second embodiment assembled in the machining jig;
fig. 7 is a schematic top view of the inner jig of the second embodiment assembled in the machining jig.
Detailed Description
In order that the manner in which the utility model is attained, as well as the features and advantages thereof, will be readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof.
Embodiment one: the machining fixture for clamping the valve rod is shown in fig. 1-4, the valve rod 1 mainly comprises a disc-shaped rod head 10 and a rod body 11 which are integrally cast, the rod head 10 and the rod body 11 are T-shaped, a transition step 12 is arranged at the joint of the rod body 10 and the rod head 11,
the machining fixture comprises an upper clamping body 2 and a lower shaft body 3, wherein the upper clamping body 2 and the lower shaft body 3 are integrally formed, the diameter of the upper clamping body 2 is larger than that of the lower shaft body 3, coaxiality is kept between the upper clamping body 2 and the lower shaft body 3, an inner counter bore 4 for accommodating a valve rod is arranged in the upper clamping body 2 and the lower shaft body 3, the inner counter bore 4 extends downwards along an axis from the upper plane of the upper clamping body 2, and when a rod body 10 is placed in the inner counter bore 4, a rod head 11 of the rod body is exposed out of the inner counter bore.
The detachable rod body sleeve 5 is embedded in the inner counter bore 4, the rod body sleeve 5 is divided into a left half bud sleeve 50 and a right half bud sleeve 51 which are symmetrically designed and can be opened and closed, the left half bud sleeve 50 and the right half bud sleeve 51 are surrounded to be in a hollow cylindrical shape, a stepped through hole 52 for accommodating the rod body 10 and the transition step 12 is formed between the left half bud sleeve 50 and the right half bud sleeve 51 when the left half bud sleeve and the right half bud sleeve are surrounded, and coaxiality is kept between the stepped through hole 52 and the inner counter bore 4. The height of the inner counter bore 4 is equal to or greater than the height of the rod body sleeve 5. The butt joint surface of the left half bud bush 50 and the right half bud bush 51 can be embedded with magnetic materials, and when the rod body is wrapped, the magnetic materials are quickly attached to the shape of the rod body, so that the rod body is clamped. After clamping, the whole rod body sleeve 5 is plugged into the inner counter bore 4 and is tightly matched after being placed in the inner counter bore, and the rod body sleeve 5 can be taken out only by pulling.
As shown in fig. 3, when the rod body of the valve rod is assembled in the rod body sleeve 5, and the rod body sleeve 5 is embedded in the inner counter bore 4, the rod head is exposed outside, the lower shaft body is clamped by the three-jaw chuck of the machine tool, so that the machine tool can be used for fixing, and when the machine tool is used for turning, the turning tool can be used for turning the rod head.
Embodiment two: the machining fixture for clamping the valve rod is shown in fig. 1, 5, 6 and 7, the valve rod 1 mainly comprises a disc-shaped rod head 10 and a rod body 11 which are integrally cast, the rod head 10 and the rod body 11 are T-shaped, a transition step 12 is arranged at the joint of the rod body 10 and the rod head 11,
the machining fixture comprises an upper clamping body 2 and a lower shaft body 3, wherein the upper clamping body 2 and the lower shaft body 3 are integrally formed, the diameter of the upper clamping body 2 is larger than that of the lower shaft body 3, coaxiality is kept between the upper clamping body 2 and the lower shaft body 3, an inner counter bore 4 for accommodating a valve rod is arranged in the upper clamping body 2 and the lower shaft body 3, the inner counter bore 4 extends downwards along an axis from the upper plane of the upper clamping body 2, and when the club head 10 is placed in the inner counter bore, a club body 11 and a transition step 12 of the club head are exposed out of the inner counter bore 4.
The inner counter bore 4 is a stepped counter bore, the uppermost step of the stepped bore is close to the upper plane of the upper clamping body 2, the diameter of the stepped bore is larger than or equal to that of the club head 10, and the lowermost step of the stepped bore penetrates into the lower shaft body.
The upper-stage stepped hole is embedded with an inner clamp 6, the inner clamp 6 is divided into a left bud 60 and a right bud 61 which are symmetrically designed and can be opened and closed, the left bud 60 and the right bud 61 are surrounded into a hollow cylindrical shape, when the left bud 60 and the right bud 61 are surrounded, a club head counter bore 62 is formed in the middle, the club head counter bore 62 and the inner counter bore 4 keep coaxiality, the opening direction of the club head counter bore 62 faces the upper plane of the upper clamping body 2, and the club head 10 is embedded in the club head counter bore 62. Also, the butt joint surfaces of the left bud 60 and the right bud 61 are embedded with magnetic materials, so that the club head in the middle is conveniently surrounded.
The height of the inner clamp 6 is higher than that of the club head 10, the height of the club head counter bore 62 is lower than the overall height of the inner clamp 6, when the inner clamp 6 is placed in the uppermost step hole of the inner counter bore 4, the upper plane of the inner clamp 6 and the upper plane of the upper clamp body 2 are kept at the same plane, and the club body 11 and the transition step 12 are exposed out of the club head counter bore 62, as shown in fig. 6.
As shown in fig. 6, when the head of the valve rod is assembled in the inner clamp 6 and the inner clamp 6 is embedded in the inner counter bore 4, the rod body is exposed outside, the lower shaft body 3 is clamped by the three-jaw chuck of the machine tool, so that the fixing can be performed, and when the turning is performed, the turning tool can perform turning on the rod body, so that the valve rod of the cast part is processed into an axial surface with higher assembly precision.
In the above first and second embodiments, the internal counterbore 4 extends from the upper plane of the upper clamp down into the lower shaft along the axis and the diameter in the upper clamp 2 is greater than the diameter in the lower shaft 3. In addition, a cross-shaped slit 7 is formed in the direction X, Y of the upper clamping body 2 and the lower shaft body 3 with the center of the upper clamping body 2 and the center of the lower shaft body 3 as the center, and the length of the slit 7 exceeds the height of the upper clamping body 2 along the axial direction of the upper clamping body 2 and the lower shaft body 3, but does not exceed the lower end of the lower shaft body 3.
Because the whole part of the lower shaft body 3 is plugged into the three-jaw chuck for full clamping when the lower shaft body is clamped on a machine tool, the crack opening 7 is contracted along with the clamping of the three-jaw chuck. The inner clamp 6 and the rod body sleeve 5 are placed in the inner counter bore 4 of the upper clamping body 2, when the whole fixture is not clamped, the crack opening 7 is in a normal state, after the lower shaft body 3 is clamped by the three-jaw chuck of the machine tool, a clamping extrusion force is arranged on the crack opening 7, so that the upper clamping body and the lower shaft body integrally generate a shrinking micro deformation, the inner clamp 6 and the rod body sleeve 5 which are in clearance fit are assembled in an interference fit manner, and at the moment, the inner clamp 6 and the rod body sleeve 5 cannot be smoothly taken out of the upper clamping body, and therefore the whole fixture can rotate along with the valve rod 1 under the driving of the three-jaw chuck, and the turning procedure is completed. After the processing is finished, the three-jaw chuck is loosened, then the crack 7 is restored to be normal again, the assembly mode of the inner clamp 6 and the rod body sleeve 5 is changed into clearance fit again, and the inner clamp 6 or the rod body sleeve 5 can be taken out. The design of the split 7 is a deformable feature for the clamping of profiled parts common in mechanical designs, which is present on the machining tool. .
The present utility model provides a machined fixture for clamping a valve stem as described in detail above. The description of the specific embodiments is only intended to aid in understanding the method of the utility model and its core concept, and it should be understood that it will be apparent to those skilled in the art that various changes and modifications can be made herein without departing from the principles of the utility model, and such changes and modifications will fall within the scope of the appended claims.
Claims (8)
1. The machining fixture for clamping the valve rod mainly comprises a disc-shaped rod head and a rod body which are integrally cast, wherein the rod head and the rod body are T-shaped, a transition ladder is arranged at the joint of the rod body and the rod head,
the method is characterized in that: the machining fixture comprises an upper clamping body and a lower shaft body, wherein the upper clamping body and the lower shaft body are integrally formed, the diameter of the upper clamping body is larger than that of the lower shaft body, coaxiality is kept between the upper clamping body and the lower shaft body, an inner counter bore for accommodating a valve rod is formed in the upper clamping body and the lower shaft body, the inner counter bore extends downwards along an axis from the upper plane of the upper clamping body, when the rod body is placed in the inner counter bore, the rod head is exposed out of the inner counter bore, and when the rod head is placed in the inner counter bore, the rod body and the transition step are exposed out of the inner counter bore.
2. A machining fixture for clamping a valve stem as claimed in claim 1, wherein: the detachable rod body sleeve is embedded in the inner counter bore, the rod body sleeve is divided into a left half bud sleeve and a right half bud sleeve which are symmetrically designed and can be opened and closed, the left half bud sleeve and the right half bud sleeve are enclosed to form a hollow cylindrical shape, a stepped through hole for accommodating the rod body and the transition step is formed in the middle of the two enclosing, and the stepped through hole and the inner counter bore keep coaxiality.
3. A machining fixture for clamping a valve stem as claimed in claim 2, wherein: the height of the inner counter bore is equal to or greater than the height of the rod body sleeve.
4. A machining fixture for clamping a valve stem as claimed in claim 1, wherein: the inner counter bore is a stepped counter bore, the step hole of the uppermost stage is close to the upper plane of the upper clamping body, the diameter of the step hole is larger than or equal to that of the club head, and the step hole of the lowermost stage penetrates into the lower shaft body.
5. A machining fixture for clamping a valve stem as defined in claim 4, wherein: the upper surface of the upper clamping body is provided with a left bud and a right bud which are symmetrically designed and can be opened and closed, the left bud and the right bud are surrounded into a hollow cylindrical shape, a club head counter bore is formed in the middle of the left bud and the right bud when the left bud and the right bud are surrounded, the club head counter bore and the inner counter bore keep coaxiality, the opening direction of the club head counter bore faces to the upper plane of the upper clamping body, and the club head is embedded in the club head counter bore.
6. A machining fixture for clamping a valve stem as defined in claim 5, wherein: the height of the inner clamp is higher than that of the club head, the height of the club head counter bore is lower than that of the whole inner clamp, when the inner clamp is placed in the uppermost stage stepped hole of the inner counter bore, the upper plane of the inner clamp and the upper plane of the upper clamping body are kept at the same plane, and the club body and the transition step of the inner clamp are exposed out of the club head counter bore.
7. A machining fixture for clamping a valve stem according to any one of claims 1 to 6, wherein: the inner counterbore extends from the upper plane of the upper clamp down into the lower shaft along the axis and has a diameter in the upper clamp that is greater than a diameter in the lower shaft.
8. The machining fixture for clamping a valve stem as claimed in claim 7, wherein: the center of the upper clamping body and the center of the lower shaft body are used as the center, a cross-shaped crack opening is formed in the X, Y direction of the upper clamping body and the lower shaft body, and the length of the crack opening exceeds the height of the upper clamping body along the axial direction of the upper clamping body and the lower shaft body, but does not exceed the lower end of the lower shaft body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320504086.6U CN219358701U (en) | 2023-03-16 | 2023-03-16 | Machining clamp for clamping valve rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320504086.6U CN219358701U (en) | 2023-03-16 | 2023-03-16 | Machining clamp for clamping valve rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219358701U true CN219358701U (en) | 2023-07-18 |
Family
ID=87141866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320504086.6U Active CN219358701U (en) | 2023-03-16 | 2023-03-16 | Machining clamp for clamping valve rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219358701U (en) |
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2023
- 2023-03-16 CN CN202320504086.6U patent/CN219358701U/en active Active
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