CN114227289A - Machining clamp and machining method for wedge gate valve - Google Patents
Machining clamp and machining method for wedge gate valve Download PDFInfo
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- CN114227289A CN114227289A CN202111340974.0A CN202111340974A CN114227289A CN 114227289 A CN114227289 A CN 114227289A CN 202111340974 A CN202111340974 A CN 202111340974A CN 114227289 A CN114227289 A CN 114227289A
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- 238000012545 processing Methods 0.000 claims abstract description 167
- 230000007246 mechanism Effects 0.000 claims abstract description 99
- 238000003825 pressing Methods 0.000 claims abstract description 66
- 238000007514 turning Methods 0.000 claims description 29
- 238000007789 sealing Methods 0.000 claims description 17
- 238000005553 drilling Methods 0.000 claims description 16
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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
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- 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
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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
- B23Q2703/00—Work clamping
- B23Q2703/02—Work clamping means
- B23Q2703/10—Devices for clamping workpieces of a particular form or made from a particular material
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Abstract
The invention relates to a processing clamp and a processing method of a wedge gate valve.A back plate is vertically fixed on a bottom plate, a positioning slide block is arranged on the back plate, a clamping plate is rotationally connected with the positioning slide block and locked by a rotational locking mechanism, the clamping plate and the back plate are locked by the processing locking mechanism, and the positioning slide block slides on the back plate and is locked by a limiting mechanism; the second surface of the clamping plate is connected with the positioning slide block, the first surface of the clamping plate is provided with a pressing plate connecting rod, a first connecting part and two aligned V-shaped positioning blocks, and the elastic self-positioning assembly is connected to the clamping plate through the first connecting part; the pressure plate connecting rod passes through the pressure plate through hole on the pressure plate and is locked by the pressure plate nut. Compared with the prior art, the novel machining clamp is designed, only one-time clamping is needed, and 1 procedure is adopted to complete machining of all machined surfaces of the valve body, so that the production efficiency is improved; the installation times of the workpieces are reduced, the position precision between the machined surfaces is guaranteed, and the later-stage assembly and adjustment link is avoided.
Description
Technical Field
The invention relates to the technical field of wedge gate valve machining, in particular to a wedge gate valve machining clamp and a wedge gate valve machining method.
Background
The wedge gate valve is widely used as an opening and closing device for connecting or cutting off the medium in oil products and steam pipelines in petrochemical industry, thermal power plants and the like. The valve body of the wedge gate valve is shown in fig. 1, the machined surface of the part is shown in fig. 2, a represents a flange a surface, B represents a flange B surface, C represents a center flange C surface, Da represents a bolt hole of the flange a surface, Db represents a bolt hole of the flange B surface, dc represents a bolt hole of the center flange C surface, Da represents a flange a-end passage hole, and Db represents a flange B-end passage hole. The inside of the valve body is provided with 2V-shaped sealing seat holes, namely an A-end inner inclined plane valve seat hole and a B-end inner inclined plane valve seat hole, the symmetry requirement of the bottom surfaces (E, D) of the two sealing seat holes is high, and the parallelism requirement of the bottom surfaces of the two sealing seat holes passing through the horizontal section of the valve body is also high.
Present wedge gate valve processing technology is comparatively complicated, and conventional processing anchor clamps are as shown in fig. 3, including location inclined plate 001 and valve body locating pin 002, fix the valve body on location inclined plate 001 through valve body locating pin 002, behind the processing anchor clamps centre gripping valve body, the processing procedure that the cooperation was gone on is specifically as follows:
a first step: turning the surface A, controlling the distance to the center of the valve body, turning the outer circle, and turning the inner hole to control the size accurately, wherein the control size is required to be used for positioning in a subsequent process;
a second step: turning a surface B, controlling the total length, turning an outer circle, and turning an inner hole to control the size accurately, wherein the surface B needs to be used for positioning in a subsequent process;
a third step: turning a C surface, and controlling the A-B flange center to be vertical to the A end flange and the B end flange of the grade;
a fourth step: drilling a flange connecting bolt hole on the surface A, controlling the center distance of the holes and the size of the holes to be accurate and needing to be used for positioning in the next procedure;
a fifth step: drilling a flange connecting bolt hole on the surface B, controlling the center distance of the holes and the size of the holes to be accurate and needing to be used for positioning in the next procedure;
a sixth step: drilling a C-face flange connecting bolt hole;
a seventh step: positioning by using an inner hole of a flange at the B end and a flange connecting bolt hole, reversely turning a sealing seat hole on the inner side surface of the A end, and controlling the symmetry and the parallelism;
an eighth step: the flange inner hole at the A end and the flange connecting bolt hole are used for positioning, the inner side surface of the B end is reversely turned to seal the seat hole, and the symmetry, the parallelism and the distance between the inner side surfaces are controlled.
From the analysis of 8 general processing procedures of the valve body of the wedge gate valve, two V-shaped sealing seat hole processing procedures are realized by twice replacement of the positioning surface and replacement of two positioning pin holes, the positioning is influenced by the total length of the valve body, the tolerance of the positioning hole and the tolerance of the positioning bolt hole, the accumulated errors bring difficulties to the requirement of the symmetry degree of the bottom surfaces (E, D) of the two sealing seat holes and the guarantee of the parallelism of the bottom surfaces of the two sealing holes through the horizontal section of the valve body, a factory usually reduces the tolerance of the diameter of a valve channel hole, reduces the tolerance of the diameter of the bolt hole, reduces the position errors of the bolt holes at two sides and reduces the distance tolerance of two flange surfaces to reduce the positioning errors as much as possible and meet the design requirement as much as possible, but the processing precision of the previous procedure is improved and the processing cost is increased, meanwhile, the prior procedures are more, the machining precision is difficult to guarantee and measure, the precision of parts is difficult to guarantee completely, the quality stability is poor, and the gate valve is often produced by single-matched parts during assembly.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a processing clamp and a processing method of a wedge gate valve, a new processing clamp is designed by adopting a process concentration means, only one-time clamping is needed, all processing surfaces of a valve body are processed by 1 procedure, and the production efficiency is improved; the working procedures are reduced, so that the number of equipment, the number of operators and the floor area are reduced, and manpower and material resources are saved; the installation times of the workpieces are reduced, the position precision between the machined surfaces is guaranteed, and the later-stage assembly and adjustment link is avoided.
The purpose of the invention can be realized by the following technical scheme:
a machining clamp of a wedge gate valve comprises a bottom plate, a clamping plate, a back plate, an elastic self-positioning assembly, a pressing plate, a positioning sliding block, a limiting mechanism, a rotating locking mechanism and a machining locking mechanism;
the back plate is vertically fixed on the bottom plate, a processing fixing hole is formed in the bottom plate, the positioning sliding block is installed on the back plate, the clamping plate is rotatably connected with the positioning sliding block and locked by the rotating locking mechanism, the clamping plate and the back plate are locked by the processing locking mechanism, the direction from the clamping plate to the positioning sliding block is taken as a z axis, the direction from the bottom plate to the back plate is taken as a y axis, an x axis is determined based on the z axis and the y axis, and the positioning sliding block slides on the back plate along the x axis and is locked by the limiting mechanism;
the second surface of the clamping plate is connected with the positioning sliding block, the first surface of the clamping plate is provided with a pressing plate connecting rod, a first connecting part and two aligned V-shaped positioning blocks, the first connecting part and the two V-shaped positioning blocks are distributed in a triangular shape, the two V-shaped positioning blocks are respectively matched with a valve body on the A surface of a flange A of the wedge gate valve and a valve body on the B surface of the flange B of the wedge gate valve, and the elastic self-positioning assembly is connected to the clamping plate through the first connecting part and matched with the valve body on the C surface of the flange C of the wedge gate valve and a guide rib in the valve body; the pressing plate is provided with a pressing plate through hole, the pressing plate through hole is matched with a pressing plate connecting rod, the pressing plate connecting rod is provided with threads, and the pressing plate connecting rod penetrates through the pressing plate through hole and is locked by a pressing plate nut.
Preferably, the pressing plate connecting rods are studs, the number of the pressing plate connecting rods is 2, the first surface of the clamping plate is provided with 2 pressing plate connecting holes, one ends of the studs are screwed into the clamping plate through the pressing plate connecting holes, and the other ends of the studs penetrate through pressing plate through holes and are locked by pressing plate nuts, so that the valve body to be machined is pressed on the machining clamp through the pressing plate.
Preferably, elasticity is from locating component includes L type basal portion, leaf spring and kicking block, the perpendicular portion and the cardboard of L type basal portion are parallel, and the horizontal portion and the cardboard of L type basal portion are perpendicular, are equipped with on the horizontal portion with first connecting portion matched with second connecting portion, be equipped with in the perpendicular portion with wedge gate valve's direction muscle matched with clearance, and clearance bilateral symmetry is equipped with logical groove, and the quantity of leaf spring is 2, installs at two logical inslots through adjusting screw, the quantity of kicking block is 2 at least, installs on the logical groove of clearance both sides and stretches into the clearance, and adjusting screw is used for adjusting the elasticity of leaf spring, and the kicking block is close to or keeps away from the center in clearance under the elastic force effect of leaf spring. The jacking block clamps the guide rib of the valve body under the action of the elastic force of the plate spring, so that the center line of the guide rib is consistent with the vertical part of the L-shaped base part, and the center plane of the valve body is self-positioned; the elastic force of the plate spring can be enhanced or weakened by screwing in or out the adjusting screw, and the centering precision of the valve body can be conveniently adjusted and positioned by adjusting the size of the elastic force; the ejector block pushes the guide ribs on the valve body to approach to the positioning center, so that the contact area is reduced, and the positioning precision is improved.
Preferably, the back plate is provided with a limiting opening, the limiting opening is matched with the positioning sliding block, and the positioning sliding block is placed in the limiting opening and slides in the limiting opening along the x-axis direction.
Preferably, stop gear includes stopper and two stop screws, still be equipped with stop screw hole on the backplate, two stop screws are along the positive negative direction screw in backplate of limit screw hole difference from the x axle, the butt on the location slider in spacing trompil, the stopper cooperatees with stop screw, is used for adjusting the depth of stop screw along the x axle screw in backplate, the stopper includes thin stopper and thick stopper.
Preferably, the number of the limiting blocks is one, and the two ends of the limiting blocks are different in thickness and are matched with the limiting screws.
Preferably, the second surface of the clamping plate is provided with a clamping plate positioning shaft, the center of the clamping plate positioning shaft is provided with a threaded hole, the rotating locking mechanism comprises a connecting nut and a connecting stud, a rotary through hole is formed in the positioning sliding block, the size of the clamping plate positioning shaft is matched with the rotary through hole, one end of the connecting stud is screwed into the clamping plate positioning shaft, the other end of the connecting stud penetrates through the rotary through hole and is locked by the connecting nut, and a connecting washer is further arranged between the connecting nut and the positioning sliding block.
Preferably, the processing locking mechanism comprises a first positioning shaft sleeve, a second positioning shaft sleeve and a positioning pin, a first processing positioning hole is formed in the clamping plate, a second processing positioning hole is formed in the back plate, the first positioning shaft sleeve is arranged in the first processing positioning hole, the second positioning shaft sleeve is arranged in the second processing positioning hole, and the positioning pin is inserted into the first positioning shaft sleeve and the second positioning shaft sleeve.
Preferably, the first processing locating hole includes flange face processing locating hole and interior inclined plane disk seat hole processing locating hole, the second processing locating hole includes flange C face processing locating hole, B end interior inclined hole processing locating hole, flange B face processing locating hole, A end interior inclined hole processing locating hole and flange A face processing locating hole, and when the cardboard rotated first position, second position and third position, flange face processing locating hole aligns with flange C face processing locating hole, flange B face processing locating hole and flange A face processing locating hole respectively, and when the cardboard rotated to fourth position and fifth position, interior inclined plane disk seat hole processing locating hole aligns with B end interior inclined hole processing locating hole and A end interior inclined hole processing locating hole respectively.
Preferably, the balance weight fixing device further comprises a balance weight, wherein a balance weight connecting hole is formed in the bottom plate, and the balance weight is installed on the bottom plate through the balance weight connecting hole by the balance weight connecting piece.
Preferably, the balance weight connecting piece is a balance screw.
A wedge gate valve processing method, which uses processing equipment and the processing clamp of the wedge gate valve, comprises the following steps:
s1, clamping the valve body on the machining clamp: the positioning of 6 degrees of freedom of the valve body is completed through the elastic self-positioning assembly and the two V-shaped positioning blocks, and the valve body is tightly pressed in the processing clamp through the pressing plate;
s2, processing the C surface of the flange: removing the elastic self-positioning assembly, adjusting the position of the positioning slider on the back plate, locking the positioning slider through a limiting mechanism, rotating the clamping plate to enable the C surface of the flange of the valve body to face the machining equipment, locking the clamping plate and the back plate by using a machining locking mechanism, locking the clamping plate and the positioning slider by using a rotating locking mechanism, and performing turning machining on the C surface of the flange and drilling machining on a flange hole dc;
s3, processing the B surface of the flange: loosening the rotating locking mechanism and the machining locking mechanism, rotating the clamping plate by 90 degrees anticlockwise to enable the flange B surface of the valve body to face the machining equipment, locking the clamping plate and the back plate by using the machining locking mechanism, locking the clamping plate and the positioning sliding block by rotating the locking mechanism, and performing turning machining on the flange B surface and drilling and machining on a flange hole db;
s4, processing the flange A surface: loosening the rotary locking mechanism and the machining locking mechanism, rotating the clamping plate by 180 degrees to enable the flange A surface of the valve body to face the machining equipment, locking the clamping plate and the back plate by using the machining locking mechanism, locking the clamping plate and the positioning sliding block by rotating the locking mechanism, and performing turning machining on the flange A surface and drilling machining on a flange hole da;
s5, machining end A sealing seat holes: loosening the rotary locking mechanism, the machining locking mechanism and the limiting mechanism, adjusting the position of the positioning slide block on the back plate, locking the positioning slide block through the limiting mechanism, rotating the clamping plate clockwise by 5 degrees, locking the clamping plate and the back plate by using the machining locking mechanism, locking the clamping plate and the positioning slide block through the rotary locking mechanism, and turning the inner inclined plane valve seat hole at the A end of the flange;
s6, B-end sealing seat hole machining: loosening the rotary locking mechanism, the machining locking mechanism and the limiting mechanism, adjusting the position of the positioning slide block on the back plate, locking the positioning slide block through the limiting mechanism, rotating the clamping plate by 190 degrees anticlockwise, locking the clamping plate and the back plate by using the machining locking mechanism, locking the clamping plate and the positioning slide block through the rotary locking mechanism, and turning a valve seat hole of an inner inclined plane at the B end of the flange;
and S7, detaching the machined valve body from the machining clamp.
Compared with the prior art, the invention has the following beneficial effects:
(1) by adopting a process centralization means, a new processing clamp is designed, only one-time clamping is needed, and 1 procedure is adopted to complete the processing of all the processing surfaces of the valve body, so that the production efficiency is improved; the working procedures are reduced, so that the number of equipment, the number of operators and the floor area are reduced, and manpower and material resources are saved; the installation times of the workpieces are reduced, the position precision between the machined surfaces is guaranteed, and the later-stage assembly and adjustment link is avoided.
(2) The limiting blocks with different thicknesses at two ends are designed, the depth of the limiting screws screwed into the back plate can be adjusted, so that the positions of the positioning sliding blocks on the back plate are changed, the positions of the valve body can be changed when different machining surfaces of the valve body are machined, the structure is simple, and the number of parts is reduced due to the design of thickness integration.
(3) The position of the first processing hole on the cardboard matches with the position of the second processing hole on the backplate, along with the cardboard rotates to different positions, the first processing hole that corresponds aligns with the second processing hole, and the coincidence of processing hole has also verified the rotating position of valve body and shift position's exactness, cooperatees with the location slider, and the position design of processing hole and the design of the thickness in spacing hole have realized the dual verification of location slider position exactness.
Drawings
FIG. 1 is a schematic structural diagram of a valve body to be processed;
FIG. 2 is a schematic view of a part processing surface of a valve body to be processed;
FIG. 3 is a schematic view of a prior art machining fixture;
FIG. 4 is an exploded view of the machining fixture of the present invention;
FIG. 5 is a schematic structural view of a base plate;
FIG. 6 is a schematic structural view of the card;
FIG. 7 is a schematic view of the platen;
FIG. 8 is a schematic structural diagram of a back plate;
FIG. 9 is a schematic structural view of a positioning slider;
FIG. 10 is a fragmentary schematic view of the resilient self-positioning assembly;
FIG. 11 is a schematic structural view of a stopper;
FIG. 12 is a schematic structural view of a resilient self-positioning assembly;
FIG. 13 is a schematic view of the valve body clamped to the machining fixture;
reference numerals: 001. positioning slope plates 002, valve body positioning pins 003 and guide ribs;
1. a bottom plate, 1-1, a processing fixing hole, 1-2, a balance block connecting hole, 2, a clamping plate, 2-1, a pressing plate connecting hole, 2-2, a flange face processing positioning hole, 2-3, an inner inclined plane valve seat hole processing positioning hole, 3, a back plate, 3-1, a limiting opening hole, 3-2, a limiting screw hole, 3-3, a flange C face processing positioning hole, 3-4, a B end inner inclined hole processing positioning hole, 3-5, a flange B face processing positioning hole, 3-6, an A end inner inclined hole processing positioning hole, 3-7, a flange A face processing positioning hole, 4, a pressing plate, 4-1, a pressing plate through hole, 5, a positioning slide block, 5-1, a rotary through hole, 6, a pressing plate connecting rod, 7, a first connecting part, 8, a V-shaped positioning block, 9, a pressing plate nut, 10, an L-shaped base part, 10-1, a through groove, 10-2, a second connecting part, 11, a plate spring, 12, a top block, 13, an adjusting screw, 14, a limiting block, 15, a limiting screw, 16, a connecting nut, 17, a connecting stud, 18, a connecting washer, 19, a clamping plate positioning shaft, 20, a first positioning shaft sleeve, 21, a second positioning shaft sleeve, 22, a positioning pin, 23, a balance block, 24 and a balance screw.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. In order to make the illustration clearer, parts are exaggerated in some places where appropriate, and in order to show the structure of parts more clearly, some components that are not related to the shown parts are omitted in the drawings.
In the description of the embodiments of the present application, it is to be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, refer to the orientation or positional relationship as shown in the drawings, or as conventionally placed in use of the product of the application, or as conventionally understood by those skilled in the art, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be considered as limiting the present application.
Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Example 1:
a machining clamp of a wedge gate valve is shown in figure 4 and comprises a bottom plate 1, a clamping plate 2, a back plate 3, an elastic self-positioning assembly, a pressing plate 4, a positioning sliding block 5, a pressing plate connecting rod 6, a first connecting part 7, a V-shaped positioning block 8, a pressing plate nut 9, a limiting mechanism, a rotating locking mechanism, a machining locking mechanism and a balancing block 23;
Specifically, as shown in fig. 5, a processing fixing hole 1-1 and a balance weight connecting hole 1-2 are provided on the bottom plate 1, a rotation center is determined by processing the fixing hole 1-1 when the processing fixture is mounted on a machine tool, a balance weight connecting member is used for mounting a balance weight 23 on the bottom plate 1 through the balance weight connecting hole 1-2, and in this embodiment, the balance weight connecting member is a balance screw 24. When the machine tool rotates around the processing fixing hole 1-1, the back plate 3 and other parts deviate from the rotation center to generate centrifugal force, the centrifugal force can be mutually offset by arranging the balance block 23, the processing clamp is protected, and the processing precision of the valve body can be improved.
The second surface of the clamping plate 2 is connected with a positioning slide block 5, as shown in fig. 6, a first surface of the clamping plate 2 is provided with a clamping plate connecting rod 6, a first connecting part 7 and two aligned V-shaped positioning blocks 8, the first connecting part 7 and the two V-shaped positioning blocks 8 are distributed in a triangular shape, a valve body to be processed is shown in fig. 1, the two V-shaped positioning blocks 8 are respectively matched with a valve body on the A surface of a flange A of the wedge gate valve and a valve body on the B surface of the flange B of the wedge gate valve, and an elastic self-positioning assembly is connected to the clamping plate 2 through the first connecting part 7 and matched with the valve body on the C surface of the flange C of the wedge gate valve and a guide rib 003 in the valve body; the pressing plate 4 is provided with a pressing plate through hole 4-1, the pressing plate through hole 4-1 is matched with a pressing plate connecting rod 6, the pressing plate connecting rod 6 is provided with threads, and the pressing plate connecting rod 6 penetrates through the pressing plate through hole 4-1 and is locked by a pressing plate nut 9.
The V-shaped positioning block 8 is provided with a V-shaped groove, and the shape of the V-shaped groove is matched with the shape of the valve body, so that the valve body can be clamped. The structure of the pressing plate 4 is shown in fig. 7, and two pressing plate through holes 4-1 are arranged on the pressing plate 4. In the embodiment, the pressing plate connecting rods 6 are stud bolts, the number of the pressing plate connecting rods is 2, the first surface of the clamping plate 2 is provided with 2 pressing plate connecting holes 2-1, one ends of the pressing plate connecting rods 6 are screwed into the clamping plate 2 through the pressing plate connecting holes 2-1, the other ends of the pressing plate connecting rods penetrate through pressing plate through holes 4-1 in the pressing plate 4 and are locked by pressing plate nuts 9, the pressing plate connecting rods 6 of the stud bolts are easy to detach and install, and the use is more convenient. After the valve body is positioned by the first connecting portion 7 and the two V-shaped positioning blocks 8, the valve body is fixedly pressed on the clamping plate 2 through the pressing plate 4 and the pressing plate connecting rod 6, as shown in fig. 13, the valve body is pressed on the machining fixture and rotates together with the clamping plate 2, the size of the valve body is properly enlarged in the drawing for more clear display, fig. 13 is only used for showing a connecting example of the valve body and the machining fixture, and does not represent that the size, the interval and the like of each component of the valve body and the machining fixture are shown in fig. 13.
As shown in fig. 4 and 13, the bottom plate 1 is located below, the back plate 3, the balance weight 23 and the like are installed above the bottom plate 1, the valve body to be processed is pressed on the clamping plate 2 by the pressing plate 4, when the clamping plate 2 rotates to the left and right positions of the first connecting portion 7 on the upper and the two V-shaped connecting blocks, one pressing plate connecting hole 2-1 is located above one V-shaped connecting block 8, the other pressing plate connecting hole 2-1 is located below the other V-shaped connecting block 8, the middle flange C surface of the pressed valve body faces upward, the flange a surface of the valve body is on the left side, and the flange B surface of the valve body is on the right side. When the clamping plate 2 rotates to the position that the first connecting part 7 is arranged at the lower part and the two V-shaped connecting blocks are arranged at the upper part and the lower part, one clamping plate connecting hole 2-1 is arranged at the left side of one V-shaped connecting block 8, the other clamping plate connecting hole 2-1 is arranged at the right side of the other V-shaped connecting block 8, the flange A surface and the flange B surface of the compressed valve body are arranged at the upper part and the lower part, and the middle flange C surface is arranged at one side.
As shown in fig. 4 and 10, the elastic self-positioning assembly comprises an L-shaped base 10, a plate spring 11 and a top block 12, wherein a vertical portion of the L-shaped base 10 is parallel to the clamping plate 2, a horizontal portion of the L-shaped base 10 is perpendicular to the clamping plate 2, a second connecting portion 10-2 matched with the first connecting portion 7 is arranged on the horizontal portion, a gap matched with the guide rib 003 of the wedge gate valve is arranged on the vertical portion, through grooves 10-1 are symmetrically arranged on two sides of the gap, the two plate springs 11 are respectively installed in the through grooves 10-1 through adjusting screws 13, the number of the top block 12 is at least 2, the top blocks 12 are installed in the through grooves 10-1 on two sides of the gap and extend into the gap, the adjusting screws 13 are used for adjusting the elastic force of the plate spring 11, and the top blocks 12 are close to or far away from the center of the gap under the elastic force of the plate springs 11.
As shown in fig. 12, a gap is left in the center of the vertical portion of the L-shaped base 10, the gap is matched with the guide rib 003, the guide rib 003 is inserted into the gap, two through grooves 10-1 are respectively arranged on two sides of the gap of the L-shaped base 10, the plate spring 11 is installed in the through groove 10-1 through the adjusting screw 13, the top block 12 is installed in the through groove 10-1 and exposed in the gap, so that the elastic force of the plate spring 11 can push the top block 12 to move towards the central line of the gap. Symmetry installation leaf spring 11 in L type basal portion 10, kicking block 12 and adjusting screw 13, make the valve body can carry out the location of X axle direction automatically, can seek the symmetry central plane of finding the valve body automatically, connect the elasticity promptly and from locating the subassembly after, elasticity is from the perpendicular portion of L type basal portion 10 of locating the subassembly parallel with cardboard 2, be located cardboard 2 center, through 4 kicking blocks 12 under the effect of the 11 elastic force of leaf spring direction muscle 003, make the central line of direction muscle 003 unanimous with the perpendicular portion of L type basal portion 10, realize the self-align of valve body central plane.
The elasticity of the plate spring 11 can be enhanced by screwing in the 4 adjusting screws 13 behind the plate spring 11, the elasticity of the plate spring 11 can be weakened by screwing out the 4 adjusting screws 13 behind the plate spring 11, and the centering precision of the valve body of the wedge gate valve can be conveniently adjusted and positioned by adjusting the elasticity; the ejector block 12 pushes the guide rib 003 on the valve body to approach to the positioning center, so that the positioning precision is improved.
In this embodiment, the first connecting portion 7 is actually a convex end portion of the card board 2, the second connecting portion 10-2 is a concave end portion, and the elastic self-positioning component and the card board 2 can be detachably connected through a screw connection or the like.
As shown in fig. 4 and 8, a limiting opening 3-1 is formed in the back plate 3, the limiting opening 3-1 is matched with the positioning slider 5, and the positioning slider 5 is placed in the limiting opening 3-1 and slides in the limiting opening 3-1 along the x-axis direction. In this embodiment, the limiting opening 3-1 is a square hole penetrating through the back plate 3, the positioning sliding block 5 is a square block, and the positioning sliding block 5 is placed in the limiting opening 3-1.
The limiting mechanism is matched with the limiting opening 3-1 and the positioning sliding block 5 and comprises a limiting block 14 and two limiting screws 15, the back plate 3 is further provided with a limiting screw hole 3-2, the two limiting screws 15 are screwed into the back plate 3 along the limiting screw hole 3-2 respectively from the positive direction and the negative direction of the x axis and abut against the positioning sliding block 5 in the limiting opening 3-1, the limiting block 14 is matched with the limiting screws 15 and used for adjusting the screwing depth of the limiting screws 15 into the back plate 3 along the x axis, and the limiting block 14 comprises a thin limiting block and a thick limiting block. In other embodiments, other limiting mechanisms can be flexibly used according to requirements.
As shown in FIG. 9, two ends of the positioning slider 5 are both provided with grooves 5-2, and the limit screw 15 is matched with the grooves 5-2.
As shown in fig. 11, the number of the limiting blocks 14 is one in this embodiment, the thicknesses of the two ends of the limiting blocks 14 are different and are matched with the limiting screws 15, and the thicknesses of the two ends can be determined according to the processing requirement, so that the positioning sliding block 5 is ensured to move to a proper position. When in processing, the end parts with different thicknesses of the limiting blocks 14 are used for adjusting the screwing depth of the limiting screws 15 into the back plate 3, so that the number of parts is reduced. In other embodiments, the limiting blocks 14 with different thicknesses can be provided, and the limiting blocks 14 with proper thicknesses can be selected according to requirements.
The clamping plate 2, the positioning sliding block 5 and the back plate 3 are connected as shown in the figures 4, 6, 8 and 9, a clamping plate positioning shaft 19 is arranged on the second surface of the clamping plate 2, a threaded hole is formed in the center of the clamping plate positioning shaft 19, the rotating locking mechanism comprises a connecting nut 16 and a connecting stud 17, a rotary through hole 5-1 is formed in the positioning sliding block 5, the size of the clamping plate positioning shaft 19 is matched with that of the rotary through hole 5-1, one end of the connecting stud 17 is screwed into the clamping plate positioning shaft 19, the other end of the connecting stud 17 penetrates through the rotary through hole 5-1 and is locked by the connecting nut 16, and a connecting washer 18 is further arranged between the connecting nut 16 and the positioning sliding block 5. In this embodiment, the rotation through hole 5-1 is a circular hole formed in the center of the positioning slider 5, and the chucking plate 2 rotates around the rotation through hole 5-1. Due to the small size of the connecting nut 16, the connecting washer 18 is provided, and after the locking mechanism is rotated to lock the clamping plate 2 and the positioning slide block 5, the clamping plate 2, the positioning slide block 5 and the back plate 3 are connected together in a pressing mode.
As shown in fig. 4, 6 and 8, the processing locking mechanism includes a first positioning shaft sleeve 20, a second positioning shaft sleeve 21 and a positioning pin 22, a first processing positioning hole is formed on the clamping plate 2, a second processing positioning hole is formed on the back plate 3, the first positioning shaft sleeve 20 is disposed in the first processing positioning hole, the second positioning shaft sleeve 21 is disposed in the second processing positioning hole, and the positioning pin 22 is inserted into the first positioning shaft sleeve 20 and the second positioning shaft sleeve 21.
The first processing positioning hole comprises a flange face processing positioning hole 2-2 and an inner inclined plane valve seat hole processing positioning hole 2-3, the second processing positioning hole comprises a flange C face processing positioning hole 3-3, a B end inner inclined hole processing positioning hole 3-4, a flange B face processing positioning hole 3-5, an A end inner inclined hole processing positioning hole 3-6 and a flange A face processing positioning hole 3-7, when the clamping plate 2 rotates to a first position, a second position and a third position, the flange face processing positioning hole 2-2 is respectively aligned with the flange face C processing positioning hole 3-3, the flange face B processing positioning hole 3-5 and the flange face A processing positioning hole 3-7, when the clamping plate 2 rotates to the fourth position and the fifth position, the processing positioning holes 2-3 of the inner inclined plane valve seat holes are respectively aligned with the processing positioning holes 3-4 of the inner inclined holes at the end B and the processing positioning holes 3-6 of the inner inclined holes at the end A.
According to the invention, through the position design of the processing hole, the positioning pin 22 can be prevented from being inserted at wrong positions when different processing surfaces are processed, the flange surface processing positioning hole 2-2 can only coincide with the flange C surface processing positioning hole 3-3, the flange B surface processing positioning hole 3-5 and the flange A surface processing positioning hole 3-7, and the inner inclined plane valve seat hole processing positioning hole 2-3 can only coincide with the B end inner inclined hole processing positioning hole 3-4 and the A end inner inclined hole processing positioning hole 3-6.
Further, in order to prevent positioning errors, the clamping plate 2 can be designed to rotate to the first position, the second position, the third position, the fourth position and the fifth position through reasonable positions, and only 1 first machining positioning hole is aligned with 1 second machining positioning hole. The correctness of the rotating position and the moving position of the valve body is verified by the superposition of the processing holes, the valve body is matched with the positioning slide block 5, and the position design of the processing holes and the thickness design of the limiting holes 14 realize the double verification of the position correctness of the positioning slide block 5.
A machining method of a wedge type gate valve uses machining equipment and a machining clamp of the wedge type gate valve to conduct machining, and comprises the following steps:
s1, clamping the valve body on the machining clamp: the positioning of 6 degrees of freedom of the valve body is completed through the elastic self-positioning assembly and the two V-shaped positioning blocks 8, and the valve body is tightly pressed in the processing clamp through the pressing plate 4;
specifically, the valve body on the flange A surface and the valve body on the flange B surface are clamped through the V-shaped positioning block 8, and the valve body is axially positioned in the y-axis and z-axis directions and is positioned in the y-axis and z-axis rotation directions; inserting an elastic self-positioning assembly into the valve body on the C surface of the flange along the guide rib 003, and pushing the valve body through a plate spring 11 of the elastic self-positioning assembly to complete axial positioning and rotation direction positioning of the valve body in the x-axis direction; after the valve body is positioned in 6 degrees of freedom, the valve body is pressed in a processing clamp through a pressure plate 4, a pressure plate connecting rod 6 and a pressure plate nut 9;
in the subsequent processing step, a numerical control turning center is sampled to serve as processing equipment, turning and drilling can be achieved, and the processing equipment is located right above a processing clamp;
s2, processing the C surface of the flange: removing the elastic self-positioning assembly, adjusting the position of the positioning slide block 5 on the back plate 3, locking the positioning slide block 5 through a limiting mechanism, rotating the clamping plate 2 to enable the flange C surface of the valve body to face the machining equipment, locking the clamping plate 2 and the back plate 3 by using a machining locking mechanism, locking the clamping plate 2 and the positioning slide block 5 by using the rotating locking mechanism, and turning the flange C surface and drilling the flange hole dc;
specifically, the elastic self-positioning assembly is removed, a thin limiting block 14 is inserted into the left side of the back plate 3, the limiting screw 15 on the left side is locked, the positioning slide block 5 is pushed to the middle of the limiting opening 3-1, and then the limiting screw 15 on the right side is locked, so that the position of the rotary through hole 5-1 is ensured to be in the middle of the back plate 3; the clamping plate 2 is rotated, namely the clamping plate 2 is rotated to a first position, so that the C surface of a middle opening flange of the valve body is vertically upward, the A surface of the flange of the valve body is on the left side, the B surface of the flange of the valve body is on the right side, the flange surface processing positioning hole 2-2 is superposed with the flange C surface processing positioning hole 3-3, a first positioning shaft sleeve 20 is arranged in the flange surface processing positioning hole 2-2, a second positioning shaft sleeve 21 is arranged in the flange C surface processing positioning hole 3-3, and a positioning pin 22 is inserted into the first positioning shaft sleeve 20 at the flange surface processing positioning hole 2-2 position and the second positioning shaft sleeve 21 at the flange C surface processing positioning hole 3-3 position to complete the positioning of the valve body; finally, the clamping plate 2 and the positioning sliding block 5 are locked through the connecting nut 16, and turning processing of the C surface of the middle-opening flange and drilling processing of a hole dc of the middle-opening flange are carried out;
s3, processing the B surface of the flange: loosening the rotary locking mechanism and the machining locking mechanism, rotating the clamping plate 2 anticlockwise by 90 degrees to enable the flange B surface of the valve body to face the machining equipment, locking the clamping plate 2 and the back plate 3 by using the machining locking mechanism, locking the clamping plate 2 and the positioning slide block 5 by rotating the locking mechanism, and turning the flange B surface and drilling the flange hole db;
specifically, the connecting nut 16 is unscrewed, the clamping plate 2 is loosened, the positioning pin 22 is pulled out, the clamping plate 2 is rotated to drive the valve body to rotate 90 degrees anticlockwise, namely, the clamping plate 2 rotates to a second position, so that the flange B surface of the valve body is vertically upward, at the moment, the flange surface processing positioning hole 2-2 is superposed with the flange B surface processing positioning hole 3-5, a first positioning shaft sleeve 20 is arranged in the flange surface processing positioning hole 2-2, a second positioning shaft sleeve 21 is arranged in the flange B surface processing positioning hole 3-5, and the positioning pin 22 is inserted into the first positioning shaft sleeve 20 at the flange surface processing positioning hole 2-2 position and the second positioning shaft sleeve 21 at the flange B surface processing positioning hole 3-5 position to complete the positioning of the valve body; finally, the clamping plate 2 and the positioning sliding block 5 are locked through the connecting nut 16, and the turning processing of the B surface of the flange and the drilling processing of a flange hole db are carried out;
s4, processing the flange A surface: loosening the rotary locking mechanism and the machining locking mechanism, rotating the clamping plate 2 by 180 degrees to enable the flange A surface of the valve body to face the machining equipment, locking the clamping plate 2 and the back plate 3 by using the machining locking mechanism, locking the clamping plate 2 and the positioning slide block 5 by rotating the locking mechanism, and turning the flange A surface and drilling the flange hole da;
specifically, the connecting nut 16 is unscrewed, the clamping plate 2 is loosened, the positioning pin 22 is pulled out, the clamping plate 2 is rotated to drive the valve body to rotate 180 degrees, namely, the clamping plate 2 rotates to a third position, so that the flange A surface of the valve body is vertically upward, at the moment, the flange surface processing positioning hole 2-2 is superposed with the flange A surface processing positioning hole 3-7, a first positioning shaft sleeve 20 is arranged in the flange surface processing positioning hole 2-2, a second positioning shaft sleeve 21 is arranged in the flange A surface processing positioning hole 3-7, and the positioning pin 22 is inserted into the first positioning shaft sleeve 20 at the flange surface processing positioning hole 2-2 position and the second positioning shaft sleeve 21 at the flange A surface processing positioning hole 3-7 position to complete the positioning of the valve body; finally, the clamping plate 2 and the positioning sliding block 5 are locked through the connecting nut 16, and the turning processing of the surface A of the flange and the drilling processing of the flange hole da are carried out;
s5, machining end A sealing seat holes: loosening the rotary locking mechanism, the machining locking mechanism and the limiting mechanism, adjusting the position of the positioning slide block 5 on the back plate 3, locking the positioning slide block 5 through the limiting mechanism, rotating the clamping plate 2 clockwise by 5 degrees, locking the clamping plate 2 and the back plate 3 by using the machining locking mechanism, locking the clamping plate 2 and the positioning slide block 5 through the rotary locking mechanism, and turning the inner inclined plane valve seat hole at the A end of the flange;
specifically, the connecting nut 16 is unscrewed, the clamping plate 2 is loosened, and the positioning pin 22 is pulled out; the thin limiting block 14 is taken out, the thick limiting block 14 is inserted into the right side of the back plate 3, the right limiting screw 15 is prevented from interfering the positioning slide block 5 to move rightwards, the positioning slide block 5 is pushed to the right side of the limiting opening 3-1 through the left limiting screw 15, the limiting screws 15 on the left side and the right side are locked, and the positioning slide block 5 moves rightwards; the clamping plate 2 is rotated to drive the valve body to rotate clockwise by 5 degrees, namely the clamping plate 2 rotates to a fourth position, so that the surface A of a flange of the valve body is inclined upwards, at the moment, the processing positioning hole 2-3 of the inner inclined plane valve seat hole is superposed with the processing positioning hole 3-6 of the inner inclined hole of the end A, a first positioning shaft sleeve 20 is arranged in the processing positioning hole 2-3 of the inner inclined plane valve seat hole, a second positioning shaft sleeve 21 is arranged in the processing positioning hole 3-6 of the inner inclined hole of the end A, a positioning pin 22 is inserted into the first positioning shaft sleeve 20 at the position of the processing positioning hole 2-3 of the inner inclined plane valve seat hole and the second positioning shaft sleeve 21 at the position of the processing positioning hole 3-6 of the inner inclined hole of the end A, and the positioning of the valve body is completed; finally, the clamping plate 2 and the positioning slide block 5 are locked through a connecting nut 16, and the turning processing of the valve seat hole of the inner inclined plane at the end A of the flange is carried out;
s6, B-end sealing seat hole machining: loosening the rotary locking mechanism, the machining locking mechanism and the limiting mechanism, adjusting the position of the positioning slide block 5 on the back plate 3, locking the positioning slide block 5 through the limiting mechanism, rotating the clamping plate 2 anticlockwise by 190 degrees, locking the clamping plate 2 and the back plate 3 by using the machining locking mechanism, locking the clamping plate 2 and the positioning slide block 5 through the rotary locking mechanism, and turning the inner inclined plane valve seat hole at the B end of the flange;
specifically, the connecting nut 16 is unscrewed, the clamping plate 2 is loosened, and the positioning pin 22 is pulled out; a thick limiting block 14 is inserted into the left side of the back plate 3 to prevent the limiting screw 15 on the left side from interfering the positioning slide block 5 to move leftwards, the positioning slide block 5 is pushed to the left side of the limiting opening 3-1 through the limiting screw 15 on the right side, the limiting screws 15 on the left side and the right side are locked, and the left movement of the positioning slide block 5 is realized; the clamping plate 2 is rotated to drive the valve body to rotate anticlockwise by 190 degrees, namely the clamping plate 2 rotates to a fifth position, so that the flange B surface of the valve body is inclined upwards, at the moment, the inner inclined plane valve seat hole machining positioning hole 2-3 is superposed with the inner inclined hole machining positioning hole 3-4 at the B end, a first positioning shaft sleeve 20 is arranged in the inner inclined plane valve seat hole machining positioning hole 2-3, a second positioning shaft sleeve 21 is arranged in the inner inclined hole machining positioning hole 3-4 at the B end, and a positioning pin 22 is inserted into the first positioning shaft sleeve 20 at the position of the inner inclined plane valve seat hole machining positioning hole 2-3 and the second positioning shaft sleeve 21 at the position of the inner inclined hole machining positioning hole 3-4 at the B end to complete the positioning of the valve body; finally, the clamping plate 2 and the positioning slide block 5 are locked through a connecting nut 16, and the turning processing of the valve seat hole of the inner inclined plane at the B end of the flange is carried out;
and S7, detaching the processed valve body from the processing clamp.
In the valve body machining process, the valve seat holes with the 5-degree inner inclined surfaces on the flange A surface and the flange B surface need to be machined in the steps S5 and S6, the rotation center during machining of the inner inclined surfaces is different from the rotation centers of the flange A surface, the flange B surface and the flange C surface, and the position of the rotation through hole 5-1 in the positioning slide block 5 needs to be adjusted by changing the limiting block 14.
The conventional process for machining the valve body of the wedge gate valve is completed through 8 working procedures, particularly the working procedure for machining two V-shaped sealing seat holes D and E is realized through twice replacement of positioning surfaces and replacement of two positioning pin holes, the positioning is influenced by the total length of the valve body, the tolerance of the positioning holes and the tolerance of positioning bolt holes, the requirement of the symmetry degree of the bottom surfaces (E, D) of the two sealing seat holes and the requirement of the parallelism degree of the bottom surfaces of the two sealing holes through the horizontal section of the valve body are difficult to ensure, the design requirements can be met as far as possible by strictly controlling the diameters of valve passage holes, the diameters of bolt holes and the position errors of bolt holes at two sides in a factory, but the machining precision of the previous working procedure is improved, the machining cost is increased, and meanwhile, the machining precision is ensured and difficult to measure due to more previous working procedures, the precision of parts is difficult to be completely ensured, the quality stability is poor, and the production of the gate valve is realized by single assembly at last when the gate valve is assembled.
Aiming at the defects of multiple working procedures, dispersed process, low production efficiency, poor quality stability and high production cost in the prior art, the invention adopts a process centralized means, only needs one-time clamping by adopting a new processing clamp, adopts 1 working procedure to complete the processing of all processing surfaces, and improves the production efficiency; the working procedures are reduced, so that the number of equipment, the number of operators and the floor area are reduced, and manpower and material resources are saved; the installation times of the workpieces are reduced, the position precision between the machined surfaces is guaranteed, and the later-stage assembly and adjustment link is avoided.
The invention adopts 1 procedure to finish the processing of all processing surfaces, the valve body to be processed is clamped in a processing clamp, the dimensional precision and the position precision of the V-shaped sealing seat holes (E, D) of the two inner side surfaces and the verticality precision of the middle-opening flange surface (C) are strictly ensured only according to the design function requirement, the total length of the rest of the two flange surfaces can adopt free tolerance, bolt holes (Da, Da), flange outer circles (A end and B end) and channel holes (Da, Db) can be obtained by directly casting even by adopting castings without mechanical processing, the weight of the castings is reduced, few or no cutting is realized, the quality of parts is improved to a great extent, and the processing cost of the parts is also reduced.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. A machining clamp of a wedge gate valve is characterized by comprising a bottom plate, a clamping plate, a back plate, an elastic self-positioning assembly, a pressing plate, a positioning sliding block, a limiting mechanism, a rotating locking mechanism and a machining locking mechanism;
the back plate is vertically fixed on the bottom plate, a processing fixing hole is formed in the bottom plate, the positioning sliding block is installed on the back plate, the clamping plate is rotatably connected with the positioning sliding block and locked by the rotating locking mechanism, the clamping plate and the back plate are locked by the processing locking mechanism, the direction from the clamping plate to the positioning sliding block is taken as a z axis, the direction from the bottom plate to the back plate is taken as a y axis, an x axis is determined based on the z axis and the y axis, and the positioning sliding block slides on the back plate along the x axis and is locked by the limiting mechanism;
the second surface of the clamping plate is connected with the positioning sliding block, the first surface of the clamping plate is provided with a pressing plate connecting rod, a first connecting part and two aligned V-shaped positioning blocks, the first connecting part and the two V-shaped positioning blocks are distributed in a triangular shape, the two V-shaped positioning blocks are respectively matched with a valve body on the A surface of a flange A of the wedge gate valve and a valve body on the B surface of the flange B of the wedge gate valve, and the elastic self-positioning assembly is connected to the clamping plate through the first connecting part and matched with the valve body on the C surface of the flange C of the wedge gate valve and a guide rib in the valve body; the pressing plate is provided with a pressing plate through hole, the pressing plate through hole is matched with a pressing plate connecting rod, the pressing plate connecting rod is provided with threads, and the pressing plate connecting rod penetrates through the pressing plate through hole and is locked by a pressing plate nut.
2. The machining clamp of the wedge gate valve according to claim 1, wherein the elastic self-positioning assembly comprises an L-shaped base, a plate spring and a top block, wherein a vertical portion of the L-shaped base is parallel to the clamping plate, a transverse portion of the L-shaped base is perpendicular to the clamping plate, a second connecting portion matched with the first connecting portion is arranged on the transverse portion, a gap matched with a guide rib of the wedge gate valve is formed in the vertical portion, through grooves are symmetrically formed in two sides of the gap, the number of the plate springs is 2, the plate springs are installed in the two through grooves through adjusting screws, the number of the top block is at least 2, the top blocks are installed on the through grooves in two sides of the gap and extend into the gap, the adjusting screws are used for adjusting the elastic force of the plate springs, and the top blocks are close to or far away from the center of the gap under the elastic force of the plate springs.
3. The machining jig for the wedge gate valve according to claim 1, wherein the back plate is provided with a limiting opening, the limiting opening is adapted to the positioning slider, and the positioning slider is placed in the limiting opening and slides in the limiting opening along the x-axis direction.
4. The machining fixture of a wedge gate valve according to claim 3, wherein the limiting mechanism comprises a limiting block and two limiting screws, the back plate is further provided with a limiting screw hole, the two limiting screws are screwed into the back plate along the limiting screw hole respectively from the positive direction and the negative direction of the x axis and abut against the positioning slide block in the limiting opening, the limiting block is matched with the limiting screws and used for adjusting the depth of the limiting screws screwed into the back plate along the x axis, and the limiting block comprises a thin limiting block and a thick limiting block.
5. The machining clamp of the wedge type gate valve according to claim 4, wherein the number of the limiting blocks is one, and the thickness of the two ends of the limiting block is different and is matched with the limiting screw.
6. The machining fixture of a wedge gate valve according to claim 3, wherein the second surface of the clamping plate is provided with a clamping plate positioning shaft, the center of the clamping plate positioning shaft is provided with a threaded hole, the rotary locking mechanism comprises a connecting nut and a connecting stud, the positioning slider is provided with a rotary through hole, the clamping plate positioning shaft is matched with the rotary through hole in size, one end of the connecting stud is screwed into the clamping plate positioning shaft, the other end of the connecting stud penetrates through the rotary through hole and is locked by the connecting nut, a connecting washer is further arranged between the connecting nut and the positioning slider, and the clamping plate rotates around the rotary through hole.
7. The machining jig for the wedge gate valve according to claim 1, wherein the machining locking mechanism includes a first positioning boss, a second positioning boss, and a positioning pin, the clamping plate is provided with a first machining positioning hole, the back plate is provided with a second machining positioning hole, the first positioning boss is disposed in the first machining positioning hole, the second positioning boss is disposed in the second machining positioning hole, and the positioning pin is inserted into the first positioning boss and the second positioning boss.
8. The machining jig for a wedge gate valve according to claim 7, wherein the first machining positioning hole includes a flange-face machining positioning hole and an inner-slope-face valve-seat-hole machining positioning hole, and the second machining positioning hole includes a flange-C-face machining positioning hole, a B-end inner-slope-hole machining positioning hole, a flange-B-face machining positioning hole, an A-end inner-slope-hole machining positioning hole, and a flange-A-face machining positioning hole,
when the clamping plate rotates to the first position, the second position and the third position, the flange face processing positioning hole is respectively aligned with the flange C face processing positioning hole, the flange B face processing positioning hole and the flange A face processing positioning hole,
when the clamping plate rotates to the fourth position and the fifth position, the processing positioning hole of the inner inclined plane valve seat hole is respectively aligned with the processing positioning hole of the inner inclined hole at the B end and the processing positioning hole of the inner inclined hole at the A end.
9. The jig for machining a wedge type gate valve according to claim 1, further comprising a balance weight, wherein the bottom plate is provided with a balance weight connection hole, and the balance weight is mounted on the bottom plate through the balance weight connection hole by a balance weight connection member.
10. A method of processing a wedge gate valve, using a processing apparatus and the processing jig for a wedge gate valve according to any one of claims 1 to 9, comprising the steps of:
s1, clamping the valve body on the machining clamp: the positioning of 6 degrees of freedom of the valve body is completed through the elastic self-positioning assembly and the two V-shaped positioning blocks, and the valve body is tightly pressed in the processing clamp through the pressing plate;
s2, processing the C surface of the flange: removing the elastic self-positioning assembly, adjusting the position of the positioning slider on the back plate, locking the positioning slider through a limiting mechanism, rotating the clamping plate to enable the C surface of the flange of the valve body to face the machining equipment, locking the clamping plate and the back plate by using a machining locking mechanism, locking the clamping plate and the positioning slider by using a rotating locking mechanism, and performing turning machining on the C surface of the flange and drilling machining on a flange hole dc;
s3, processing the B surface of the flange: loosening the rotating locking mechanism and the machining locking mechanism, rotating the clamping plate by 90 degrees anticlockwise to enable the flange B surface of the valve body to face the machining equipment, locking the clamping plate and the back plate by using the machining locking mechanism, locking the clamping plate and the positioning sliding block by rotating the locking mechanism, and performing turning machining on the flange B surface and drilling and machining on a flange hole db;
s4, processing the flange A surface: loosening the rotary locking mechanism and the machining locking mechanism, rotating the clamping plate by 180 degrees to enable the flange A surface of the valve body to face the machining equipment, locking the clamping plate and the back plate by using the machining locking mechanism, locking the clamping plate and the positioning sliding block by rotating the locking mechanism, and performing turning machining on the flange A surface and drilling machining on a flange hole da;
s5, machining end A sealing seat holes: loosening the rotary locking mechanism, the machining locking mechanism and the limiting mechanism, adjusting the position of the positioning slide block on the back plate, locking the positioning slide block through the limiting mechanism, rotating the clamping plate clockwise by 5 degrees, locking the clamping plate and the back plate by using the machining locking mechanism, locking the clamping plate and the positioning slide block through the rotary locking mechanism, and turning the inner inclined plane valve seat hole at the A end of the flange;
s6, B-end sealing seat hole machining: loosening the rotary locking mechanism, the machining locking mechanism and the limiting mechanism, adjusting the position of the positioning slide block on the back plate, locking the positioning slide block through the limiting mechanism, rotating the clamping plate by 190 degrees anticlockwise, locking the clamping plate and the back plate by using the machining locking mechanism, locking the clamping plate and the positioning slide block through the rotary locking mechanism, and turning a valve seat hole of an inner inclined plane at the B end of the flange;
and S7, detaching the machined valve body from the machining clamp.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111340974.0A CN114227289B (en) | 2021-11-12 | 2021-11-12 | Machining clamp and machining method for wedge gate valve |
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| CN202111340974.0A CN114227289B (en) | 2021-11-12 | 2021-11-12 | Machining clamp and machining method for wedge gate valve |
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| CN114227289B CN114227289B (en) | 2022-11-18 |
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Effective date of registration: 20240614 Address after: 201611 floor 1 and 2, building 38, No. 615, Lianhe Road, Chedun Town, Songjiang District, Shanghai Patentee after: SHANGHAI KAIYAN MACHINERY EQUIPMENT CO.,LTD. Country or region after: China Address before: 201620 No. 333, Longteng Road, Shanghai, Songjiang District Patentee before: SHANGHAI University OF ENGINEERING SCIENCE Country or region before: China |