CN111823042A - Machining process of wedge gate valve body and spherical positioning fixture - Google Patents
Machining process of wedge gate valve body and spherical positioning fixture Download PDFInfo
- Publication number
- CN111823042A CN111823042A CN201910309638.6A CN201910309638A CN111823042A CN 111823042 A CN111823042 A CN 111823042A CN 201910309638 A CN201910309638 A CN 201910309638A CN 111823042 A CN111823042 A CN 111823042A
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- positioning
- valve body
- gate valve
- wedge gate
- wedge
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/12—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for securing to a spindle in general
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/001—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass valves or valve housings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Turning (AREA)
Abstract
The invention relates to the valve manufacturing industry, and provides an integrated processing technology for processing a left valve seat hole and a right valve seat hole of a wedge gate valve body and a flange and a spherical positioning clamp thereof.
Description
Technical Field
The invention relates to the valve manufacturing industry, in particular to an integrated machining process of a left valve seat hole, a right valve seat hole and a flange of a wedge gate valve body and a spherical positioning clamp thereof.
Background
Valve manufacturing industry, when processing two valve seat holes and flange about wedge gate valve body, the common technology of enterprise is: in the previous working procedure, a middle flange is firstly processed, left and right side flanges are processed by taking the middle flange as a reference, then a left side flange is clamped to process a right side valve seat hole, a right side flange is clamped to process a left side valve seat hole, multiple times of clamping are carried out, the references are not overlapped, the symmetry degree of two valve seat holes of the wedge type gate valve body relative to the central line of the flange and the associated size requirements are difficult to ensure, and the thickness of the two side flanges is also uneven due to twice centering. The machining precision is not high, the interchangeability is poor during valve assembly, and the valve body and the flashboard are mostly singly matched, so that the machining rejection rate of the valve body is high, the labor intensity is high, and the production efficiency is low.
Disclosure of Invention
The invention relates to the valve manufacturing industry, and provides a process for integrally processing left and right valve seat holes and flanges of a wedge gate valve body and a spherical positioning clamp according to production requirements in order to improve the processing dimensional accuracy of the left and right valve seat holes and flanges of the wedge gate valve body, ensure the form and position tolerance accuracy and avoid the size and form and position errors caused by size chain conversion and multiple clamping during processing. The problems that the dimension of a wedge gate valve body is out of tolerance in machining caused by multiple times of clamping, particularly the dimension of the space between valve seat holes on two sides of the wedge gate valve body is out of tolerance, the symmetry degree of the valve seat holes relative to the center line of a middle flange is out of tolerance, and the thickness of flanges on the left side and the right side is uneven are mainly solved. The process and the clamp are used for one-time clamping and processing, and the symmetry degree of two valve seat holes of the wedge gate valve body relative to the center line of the flange and the associated dimensional precision requirement are ensured. The processing precision is improved, the labor intensity is reduced, and the production efficiency is improved.
The embodiment of the invention provides an integrated processing technology for processing left and right valve seat holes and flanges of a wedge gate valve body, the implementation of the optimized technology is ensured by a clamp positioned by a spherical surface, the clamp is positioned by a ball table fixed on a ball socket of a corner disc, and a cushion block, a workpiece positioning pin, zero positioning, wedge angle positioning, a positioning guide block, a ball table positioning pin, a positioning pin locking nail, a pressing plate, a clamping screw rod, a pressing block, a pressing plate hinged support, a pressing plate pad support, a loose joint bolt, a balancing block, an anti-falling assembly and other parts are designed. The integrated processing technology of the left and right valve seat holes and the flange of the wedge gate valve body is realized by the following steps: when the flange is processed, the zero-degree positioning is used, the ball table rotates 180 degrees, the flange on the other side is processed, when the valve seat hole is processed, the wedge angle positioning is used, the ball table rotates 180 degrees, and the valve seat hole on the other side is processed; the wedge angle positioning can be designed into 2 degrees, 52 degrees, 3 degrees, 30 degrees, 5 degrees, 8 degrees and 10 degrees according to the angle of a valve seat hole of the wedge gate valve, and the wedge angle positioning is used for different wedge angles of a workpiece; the thicknesses of the workpiece positioning pin and the cushion block ensure that the spherical center of the angle disc ball socket is positioned on the central line of the left flange and the right flange of the positioned and installed workpiece and is coaxial with the lathe spindle; according to different sizes of valve bodies of the series wedge gate valves, different cushion blocks and workpiece positioning pins are matched, and the method is suitable for integrally processing left and right valve seat holes and flanges of the valve bodies of the series wedge gate valves in a segmented mode.
Drawings
Figure 1 is a top view of the present invention,
FIG. 2 is a main sectional view of the invention B-B
FIG. 3 is a cross-sectional view of the invention at C-C
FIG. 4 is a cross-sectional view taken along line D-D of the present invention
Detail of parts in fig. 1, 2, 3 and 4:
1. a workpiece (a wedge gate valve body to be processed),
1-1, left and right flange processing parts (black in the figure), 1-2 valve seat hole processing parts (black in the figure)
2. The ball table is provided with a ball table,
2-1, a cushion block, 2-2, a workpiece positioning pin,
3. a ball socket of an angle disc is arranged,
4. the ball table is positioned, and the ball table is positioned,
A4. a zero degree orientation, an B4. wedge angle orientation,
4-1, a positioning guide block, 4-2, a ball table positioning pin, 4-3, a positioning pin locking nail,
5. a pressure plate is arranged on the upper surface of the frame,
6. the lead screw is clamped tightly,
7. the pressing block is arranged on the upper surface of the frame,
8. a pressure plate hinged support is arranged on the pressure plate,
9. a support of the pressure plate pad is arranged,
10. the bolt is movably connected with the bolt head,
11. a balancing weight is arranged on the upper surface of the shell,
12. the anti-drop component is arranged on the upper part of the frame,
the invention has the positive effects that:
the invention has the advantages of low investment, one-time clamping and processing, uniform thickness of the left and right flanges and guarantees the symmetry degree of two valve seat holes of the wedge gate valve body relative to the center line of the center flange and the associated size requirement. The more deep significance lies in that the single-match which cannot be exchanged when the existing wedge gate valve body and the gate plate are assembled is changed into the blind-match with high interchangeability due to the fact that the symmetry degree of the two valve seat holes relative to the center line of the flange and the related dimensional precision are improved. The valve body of the wedge gate valve is multipurpose, and is suitable for integrally processing left and right valve seat holes and flanges of a series of wedge gate valve bodies in a segmented mode. The device simplifies the process action, has uniform reference, accurate positioning, firm clamping and convenient operation, reduces the labor intensity and improves the production efficiency.
Detailed Description
According to production needs, the production process flow of the wedge gate valve body is as follows:
numerical control milling, numerical control turning, drilling, welding and grinding
1. Carrying out numerical control milling, positioning two flow holes by opposite vertex of a taper pin, centering the back surfaces of a left flange and a right flange with reference to a guide rib, roughly and finely milling the end surface of a middle flange, and drilling a bolt hole of the middle flange, wherein the diameter precision of the two holes with long diagonal is 0 to +0.05mm, and the size precision of the center distance between the two holes is +/-0.1 mm;
2. performing numerical control turning, namely performing one-surface double-pin positioning by using the end face of the middle flange and two radial long diagonal holes of the end face which are subjected to finish machining in the numerical control milling in the step 1, performing one-time positioning and clamping in a clamp, and performing rough and finish turning on the left and right side flanges, the sealing waterline and the valve seat hole respectively at four stations;
3. drilling bolt holes of the edge flange, back countersinking the edge flange and the middle flange;
4. welding, namely welding the valve seat which is subjected to surfacing and finish turning;
5. and grinding the sealing surface.
In order to realize the integrated processing of the left and right flanges and the valve seat hole in the numerical control turning in the working procedure 2, the invention designs a spherical positioning clamp to ensure the implementation of the process. The design of the spherical positioning clamp is characterized in that: on the axis A of a concave hole cylindrical surface connected and positioned with a machine tool, the concave spherical center of the angle disc ball socket 3 is adjusted to have the coaxiality tolerance of the central lines of the flanges at the left side and the right side of the workpiece 1 to the main shaft of the machine tool of phi 0.05mm by using a cushion block 2-1; the workpiece positioning pin 2-2 is positioned on the ball table 2, the ball table 2 is contacted with the angle disc ball socket 3 by the convex-concave spherical surfaces with equal diameters, and the two pairs of ball table positioning pins 4 are matched for accurate positioning; the ball table positioning 4 comprises a zero degree positioning A4 and a wedge angle positioning B4 which are respectively paired, wherein the zero degree positioning A4 is used for positioning when the left flange 1-1 and the right flange 1-1 are processed, a workpiece rotates 180 degrees, the flange 1-1 on the other side is processed, the wedge angle positioning B4 is used for positioning when the left valve seat hole 1-2 and the right valve seat hole 1-2 are processed, the workpiece rotates 180 degrees, and the valve seat hole 1-2 on the other side is processed; the wedge angle positioning B4 can be selected to be used according to the valve seat hole angles of the wedge gate valve, such as 2 degrees 52 degrees, 3 degrees 30 degrees, 5 degrees, 8 degrees and 10 degrees; the table positioning 4 of either zero-degree positioning A4 or wedge-angle positioning B4 consists of a positioning guide block 4-1, a table positioning pin 4-2 and a positioning pin locking nail 4-3; a clamping mechanism is composed of a pressing plate 5, a clamping screw 6, a pressing block 7, a pressing plate hinged support 8, a pressing plate pad support 9 and a loose joint bolt 10 to fix a workpiece 1; a rotary balance block 11 is added on the clamp to reduce the eccentricity during turning, and an anti-falling component 12 is added to prevent the ball table 2 from falling off accidentally when the workpiece is assembled and disassembled; corresponding to different sizes of valve bodies of the series wedge gate valves, a cushion block 2-1 and a workpiece positioning pin 2-2 with corresponding sizes are matched so as to be suitable for integrally processing left and right side valve seat holes and flanges of the valve bodies of the series wedge gate valves in a segmented mode.
The left and right flanges are uniform in thickness, clamping times are reduced, the reference is uniform, machining precision is high, labor and time are saved, and technical guarantee is provided for realizing high interchangeability blind matching of the valve body and the flashboard.
Claims (8)
1. A wedge gate valve body machining process and a spherical positioning fixture are characterized in that one-side double-pin positioning is achieved through a finished middle flange face end and two holes in the radial direction, the two holes in the diagonal direction are in a double-pin positioning mode, one-time positioning and clamping are achieved in one fixture, and a left flange, a right flange and a valve seat hole are respectively roughly and finely turned in four stations.
2. The machining process and the spherical positioning fixture of the wedge gate valve body according to claim 1, characterized in that the coaxiality tolerance of the center line of the flanges at the left and right sides of the workpiece (1) to the main shaft of the machine tool is adjusted to be phi 0.05mm by using the cushion block (2-1) on the axis of the cylindrical surface of the concave hole of the angle disc ball socket (3) which is connected and positioned with the machine tool.
3. The machining process and the spherical positioning fixture for the wedge gate valve body according to the claims 1 and 2 are characterized in that the workpiece positioning pin (2-2) is positioned on the ball table (2), the ball table (2) and the angle disc ball socket (3) are contacted by convex-concave spherical surfaces with equal diameters, and the two pairs of ball table positioning (4) are matched for accurate positioning.
4. The machining process and the spherical surface positioning fixture of the wedge gate valve body according to the claims 1, 2 and 3, characterized in that the table positioning (4) is divided into two pairs of zero degree positioning (A4) and wedge angle positioning (B4), the zero degree positioning A4 is used for positioning when machining the left and right flanges (1-1), the table is rotated by 180 degrees for machining the other side flange (1-1), the wedge angle positioning B4 is used for positioning when machining the left and right valve seat holes (1-2), and the table is rotated by 180 degrees for machining the other side valve seat hole (1-2).
5. A wedge gate valve body processing technology and a spherical surface positioning jig according to claims 1, 2 and 3, wherein the wedge angle positioning (B4) can be selected according to the valve seat hole angle of the wedge gate valve, such as 2 °, 52 ', 3 °, 30', 5 °, 8 ° and 10 °.
6. The machining process and the spherical surface positioning fixture of the wedge gate valve body according to the claims 1, 2 and 3, characterized in that the table positioning (4) of either zero degree positioning (A4) or wedge angle positioning (B4) consists of a positioning guide block (4-1), a table positioning pin (4-2) and a positioning pin locking nail (4-3).
7. The machining process and the spherical positioning fixture of the wedge gate valve body according to the claims 1 and 2, characterized in that a rotating balance block (11) is added on the fixture to reduce the eccentricity during turning, and an anti-drop assembly (12) is added to prevent the ball table (2) from dropping off accidentally during workpiece assembly and disassembly.
8. The machining process and the spherical positioning fixture for the wedge gate valve body according to the claims 1 and 2, characterized in that corresponding to different sizes of the valve body of the series wedge gate valve, a cushion block (2-1) and a workpiece positioning pin (2-2) with corresponding sizes are provided, so as to be suitable for the integrated machining of the left and right side valve seat holes and the flange of the valve body of the series wedge gate valve in a segmented manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910309638.6A CN111823042A (en) | 2019-04-17 | 2019-04-17 | Machining process of wedge gate valve body and spherical positioning fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910309638.6A CN111823042A (en) | 2019-04-17 | 2019-04-17 | Machining process of wedge gate valve body and spherical positioning fixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111823042A true CN111823042A (en) | 2020-10-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910309638.6A Pending CN111823042A (en) | 2019-04-17 | 2019-04-17 | Machining process of wedge gate valve body and spherical positioning fixture |
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| Country | Link |
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| CN (1) | CN111823042A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114227289A (en) * | 2021-11-12 | 2022-03-25 | 上海工程技术大学 | Machining clamp and machining method for wedge gate valve |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2065110U (en) * | 1990-03-24 | 1990-11-07 | 宋林修 | Clamping means for processing valve body and brake |
| JPH0919845A (en) * | 1995-07-07 | 1997-01-21 | Tokyo Gas Co Ltd | Chip collecting method |
| CN104493560A (en) * | 2014-12-19 | 2015-04-08 | 苏州福润机械有限公司 | Work fixture used for machining gate valve bodies |
| CN204449915U (en) * | 2015-02-04 | 2015-07-08 | 超达阀门集团股份有限公司 | A kind of frock clamp for processing gate valve sealing surface |
| CN206925578U (en) * | 2017-06-23 | 2018-01-26 | 江苏圣业阀门有限公司 | Middle flange turning attachment on a kind of gate valve |
| CN108145483A (en) * | 2017-12-22 | 2018-06-12 | 赛克思液压科技股份有限公司 | A kind of valve processing clamp |
-
2019
- 2019-04-17 CN CN201910309638.6A patent/CN111823042A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2065110U (en) * | 1990-03-24 | 1990-11-07 | 宋林修 | Clamping means for processing valve body and brake |
| JPH0919845A (en) * | 1995-07-07 | 1997-01-21 | Tokyo Gas Co Ltd | Chip collecting method |
| CN104493560A (en) * | 2014-12-19 | 2015-04-08 | 苏州福润机械有限公司 | Work fixture used for machining gate valve bodies |
| CN204449915U (en) * | 2015-02-04 | 2015-07-08 | 超达阀门集团股份有限公司 | A kind of frock clamp for processing gate valve sealing surface |
| CN206925578U (en) * | 2017-06-23 | 2018-01-26 | 江苏圣业阀门有限公司 | Middle flange turning attachment on a kind of gate valve |
| CN108145483A (en) * | 2017-12-22 | 2018-06-12 | 赛克思液压科技股份有限公司 | A kind of valve processing clamp |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114227289A (en) * | 2021-11-12 | 2022-03-25 | 上海工程技术大学 | Machining clamp and machining method for wedge gate valve |
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Application publication date: 20201027 |