CN110732927B - Three-way valve manufacturing, processing and treating machine - Google Patents
Three-way valve manufacturing, processing and treating machine Download PDFInfo
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- CN110732927B CN110732927B CN201911034625.9A CN201911034625A CN110732927B CN 110732927 B CN110732927 B CN 110732927B CN 201911034625 A CN201911034625 A CN 201911034625A CN 110732927 B CN110732927 B CN 110732927B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/02—Frames; Beds; Carriages
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
- B24B41/067—Work supports, e.g. adjustable steadies radially supporting workpieces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B47/00—Drives or gearings; Equipment therefor
- B24B47/02—Drives or gearings; Equipment therefor for performing a reciprocating movement of carriages or work- tables
- B24B47/04—Drives or gearings; Equipment therefor for performing a reciprocating movement of carriages or work- tables by mechanical gearing only
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
The invention relates to a three-way valve manufacturing and processing machine which comprises a supporting device, a fixing device and a pressing device, wherein the cross section of the supporting device is of a reversed-square-shaped structure, the fixing device is arranged on the inner end face of the lower side of the supporting device, and the pressing device is arranged on the inner end face of the upper side of the supporting device. The three-way valve surface polishing device can solve the problems that after the existing three-way valve is machined, the surface roughness is high, particularly, surface burrs and unevenness at joints are inconvenient to install and use later, the requirements on high-standard valve parts cannot be met, the surface of the three-way valve needs to be polished, and the like, and the problems that the existing valve polishing treatment usually adopts a manual polishing mode, the surface polishing is uneven, the labor intensity is high, the efficiency is low, and the like can be solved.
Description
Technical Field
The invention relates to the field of valve machining equipment, in particular to a three-way valve manufacturing, machining and processing machine.
Background
The three-way valve is a control part in a fluid conveying system and has the functions of stopping, adjusting, guiding, preventing counter flow, stabilizing pressure, shunting or overflowing and the like.
The three-way valve body has three ports, one is to enter two and go out, (left is to enter, right and go out) and ordinary valve difference have one export in the top, when the inner valve core is in different positions, the export is different, if the valve core is in the upper portion, communicate from side to side, if the valve core is in the lower portion, the right export is blocked, the left and upper ports are communicated.
At present, the following problems are caused in the processing process of the existing three-way valve: 1. the existing three-way valve has high surface roughness after being processed, particularly surface burrs and unevenness at an interface, is inconvenient to mount and use later, cannot meet the requirements on high-standard valve parts, and needs to polish the surface of the three-way valve; 2. the existing valve polishing treatment usually adopts a manual polishing mode, the surface polishing is uneven, the labor intensity is high, and the efficiency is low.
Disclosure of Invention
Technical problem to be solved
The three-way valve surface polishing device can solve the problems that after the existing three-way valve is machined, the surface roughness is high, particularly, surface burrs and unevenness at joints are inconvenient to install and use later, the requirements on high-standard valve parts cannot be met, the surface of the three-way valve needs to be polished, and the like, and the problems that the existing valve polishing treatment usually adopts a manual polishing mode, the surface polishing is uneven, the labor intensity is high, the efficiency is low, and the like can be solved.
(II) technical scheme
In order to achieve the purpose, the invention adopts the following technical scheme that the three-way valve manufacturing and processing machine comprises a supporting device, a fixing device and a pressing device, wherein the cross section of the supporting device is of a Chinese character 'hui' shape structure, the fixing device is arranged on the inner end surface of the lower side of the supporting device, and the pressing device is arranged on the inner end surface of the upper side of the supporting device.
The supporting device comprises a supporting plate, a bottom plate, a top plate, a base plate, a polishing plate and a telescopic mechanism, wherein the supporting plate is symmetrically arranged on the upper end surface of the bottom plate, the top plate is arranged on the upper end surface of the supporting plate, the base plate is arranged on the upper end surface of the bottom plate, the base plate is of a disc-shaped structure, empty grooves are formed in the base plate, the bottom plate and the polishing plate, abrasive paper is arranged on the upper end surface of the polishing plate, the telescopic mechanism is symmetrically arranged in the empty grooves of the base plate, and the polishing plate is arranged on; when the three-way valve is longitudinally rotated and polished, the upper outlet pipe of the three-way valve penetrates through empty grooves in the base plate, the bottom plate and the polishing plate, the telescopic mechanism conducts telescopic motion along with the rotation of the three-way valve, the three-way valve is always attached tightly, and abrasive paper on the polishing plate and the telescopic mechanism conducts polishing treatment on the three-way valve.
The fixing device comprises a chute frame, a slide bar, an electric slide block, an outer plate, a limiting spring, an electric rotary table and a rubber press block, wherein the chute frame is symmetrically arranged on the upper end surface of the base plate, the section of the chute frame is in a circular ring shape, the slide bar is arranged on the chute frame, the electric slide block is arranged on the slide bar and is connected with the chute frame in a sliding fit manner, the outer end surface of the electric slide block is provided with the outer plate, the limiting plate is symmetrically arranged on the outer plate in a sliding fit manner, the electric rotary table is arranged on the outer end surface of the limiting plate and is connected with the outer plate through the limiting spring, the rubber press block is arranged on the outer end surface of the electric rotary; the three-way valve is manually clamped between the rubber pressing blocks, the electric turntable is used for carrying out longitudinal rotation polishing treatment, and the electric slider is used for carrying out circular motion along the sliding rod, so that the three-way valve is transversely rotated and polished.
The pressing device comprises a transverse plate, an air cylinder, supporting blocks, a pressing frame, a sliding plate, a spring supporting rod and clamping mechanisms, wherein the air cylinder is symmetrically installed on the lower end face of the top plate, the transverse plate is installed on the movable end of the air cylinder, the supporting blocks are symmetrically installed on the lower end face of the transverse plate, ear seats are arranged on the outer side faces of the supporting blocks, the sliding plate is installed on the ear seats, the spring supporting rod is installed in the middle of the lower end face of the transverse plate, the pressing frames are installed on the movable ends of the spring supporting rod and the lower end face of the sliding plate, the cross section of each pressing frame is of a circular structure, the longitudinal section of; after the vertical rotation is polished, the air cylinder is started, the pressing frame is driven through the transverse plate, the pressing frame is attached to the three-way valve, meanwhile, the inner side face of an upper outlet of the three-way valve is attached tightly through the clamping mechanism, and the electric sliding block is opened again to perform horizontal rotation polishing.
As a preferred technical scheme of the invention: the telescopic mechanism comprises telescopic spring rods, telescopic blocks and arc-shaped plates, the telescopic spring rods are symmetrically arranged in the hollow groove of the base plate, the telescopic blocks are arranged at the movable ends of the telescopic spring rods, the cross sections of the telescopic blocks are of L-shaped structures, the telescopic blocks are connected with the polishing plate in a sliding groove matching mode, the arc-shaped plates are arranged on the outer end faces of the telescopic blocks, and abrasive paper is arranged on the upper end faces of the telescopic blocks and the arc-shaped plates; when the three-way valve is longitudinally rotated and polished, the upper outlet pipe of the three-way valve rotates to the arc plate, and the telescopic spring rod is pressed along the arc surface of the arc plate so as to enable the telescopic spring rod to perform reciprocating telescopic motion.
As a preferred technical scheme of the invention: the clamping mechanism comprises spring rods, support blocks, a roller shaft and clamping plates, the spring rods are symmetrically arranged in the middle of the pressing frame, the support blocks are arranged on the movable ends of the spring rods and are connected with the pressing frame in a sliding groove matching mode, the roller shaft is arranged on the support blocks through a pin shaft, the clamping plates are arranged on the roller shaft, and abrasive paper is arranged on the outer end faces of the clamping plates; when the hold-down frame moves downwards, the clamping plate rotates along the roller shaft, and the spring rod is utilized to enable the clamping plate to be attached to the inner side face of the upper outlet of the three-way valve tightly.
As a preferred technical scheme of the invention: the cross section of the arc-shaped plates is of a crescent structure, and the distance between the outermost ends of the two arc-shaped plates is larger than the outer diameter of the pipeline for processing the three-way valve.
As a preferred technical scheme of the invention: the cross sections of the empty grooves formed in the base plate, the bottom plate and the grinding plate are of semicircular structures.
As a preferred technical scheme of the invention: the lower end section of the clamping plate is of a semicircular structure.
(III) advantageous effects
1. The three-way valve manufacturing and processing machine provided by the invention can polish the outer surface of the three-way valve, polish burrs on the surface and unevenness at the interface, reduce the surface roughness, meet the requirements of high-standard valve parts, facilitate subsequent installation and use, and simultaneously reduce the labor intensity of workers and greatly improve the processing efficiency by adopting a full-automatic mechanical processing mode.
2. According to the three-way valve manufacturing and processing machine provided by the invention, the electric turntable is matched with the grinding plate and the telescopic mechanism, so that the three-way valve is longitudinally and rotationally ground, and the electric slide block is matched with the pressing frame and the clamping mechanism, so that the three-way valve is transversely and rotationally ground, and the purposes of grinding burrs on the surface and unevenness at the interface and reducing the surface roughness are achieved.
3. According to the three-way valve manufacturing, processing and processing machine provided by the invention, the supporting device, the fixing device and the pressing device are matched with each other, so that the purpose of fully automatically polishing the three-way valve is achieved, the labor intensity of workers is reduced, and the processing efficiency is greatly improved.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view of the present invention;
FIG. 3 is a first enlarged view of a portion of FIG. 1 in accordance with the present invention;
FIG. 4 is a second enlarged view of the portion of FIG. 1 of the present invention;
fig. 5 is a schematic view of the construction of the telescoping block and arcuate plate of the present invention.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.
As shown in fig. 1 to 5, the three-way valve manufacturing and processing machine comprises a supporting device 1, a fixing device 2 and a pressing device 3, wherein the cross section of the supporting device 1 is of a structure shaped like a Chinese character 'hui', the fixing device 2 is installed on the inner end face of the lower side of the supporting device 1, and the pressing device 3 is installed on the inner end face of the upper side of the supporting device 1.
The supporting device 1 comprises a supporting plate 11, a bottom plate 12, a top plate 13, a base plate 14, a polishing plate 15 and a telescopic mechanism 16, wherein the supporting plate 11 is symmetrically arranged on the upper end surface of the bottom plate 12, the top plate 13 is arranged on the upper end surface of the supporting plate 11, the base plate 14 is arranged on the upper end surface of the bottom plate 12, the base plate 14 is of a disc-shaped structure, empty grooves are formed in the base plate 14, the bottom plate 12 and the polishing plate 15, sand paper is arranged on the upper end surface of the polishing plate 15, the telescopic mechanism 16 is symmetrically arranged in the empty groove of the base plate 14, and the polishing plate 15 is arranged on the; when the three-way valve is longitudinally rotated and polished, an upper outlet pipe of the three-way valve penetrates through empty grooves in the base plate 14, the bottom plate 12 and the polishing plate 15, the telescopic mechanism 16 conducts telescopic motion along with the rotation of the three-way valve and is always attached to the three-way valve, and abrasive paper on the polishing plate 15 and the telescopic mechanism 16 conducts polishing treatment on the three-way valve.
The fixing device 2 comprises a chute frame 21, a slide bar 22, an electric slide block 23, an outer plate 24, a limiting plate 25, a limiting spring 26, an electric rotary table 27 and a rubber pressing block 28, the chute frame 21 is symmetrically installed on the upper end face of the backing plate 14, the section of the chute frame 21 is in a circular ring shape, the slide bar 22 is installed on the chute frame 21, the electric slide block 23 is installed on the slide bar 22, the electric slide block 23 is connected with the chute frame 21 in a sliding fit manner, the outer end face of the electric slide block 23 is provided with the outer plate 24, the limiting plate 25 is symmetrically installed on the outer plate 24 in a sliding fit manner, the electric rotary table 27 is installed on the outer end face of the limiting plate 25, the electric rotary table 27 is connected with the outer plate 24 through the limiting spring 26, the rubber pressing block 28 is installed on the outer end; the three-way valve is manually clamped between the rubber pressing blocks 28, and is longitudinally rotated and polished by the electric turntable 27, and then is transversely rotated and polished by the electric slider 23 along the slide rod 22.
The pressing device 3 comprises a transverse plate 31, an air cylinder 32, a supporting block 33, a pressing frame 34, a sliding plate 35, a spring 36, a spring supporting rod 37 and a clamping mechanism 38, the air cylinder 32 is symmetrically installed on the lower end face of the top plate 13, the transverse plate 31 is installed on the movable end of the air cylinder 32, the supporting block 33 is symmetrically installed on the lower end face of the transverse plate 31, an ear seat is arranged on the outer side face of the supporting block 33, the sliding plate 35 is installed on the ear seat, the spring supporting rod 37 is installed in the middle of the lower end face of the transverse plate 31, the pressing frame 34 is installed on the movable end of the spring supporting rod 37 and the lower end face of the sliding plate 35, the cross section of the pressing frame 34 is of a circular structure, the longitudinal section of the pressing; after the vertical rotation polishing treatment, the cylinder 32 is started, the transverse plate 31 drives the pressing frame 34, so that the pressing frame 34 is attached to the three-way valve, meanwhile, the clamping mechanism 38 is used for attaching the inner side surface of the upper outlet of the three-way valve, and then the electric slide block 23 is opened for horizontal rotation polishing treatment.
The telescopic mechanism 16 comprises telescopic spring rods 161, telescopic blocks 162 and arc-shaped plates 163, the telescopic spring rods 161 are symmetrically arranged in the hollow groove of the base plate 14, the telescopic blocks 162 are arranged at the movable ends of the telescopic spring rods 161, the cross sections of the telescopic blocks 162 are of L-shaped structures, the telescopic blocks 162 are connected with the polishing plate 15 in a sliding groove matching mode, the arc-shaped plates 163 are arranged on the outer end faces of the telescopic blocks 162, and sand paper is arranged on the upper end faces of the telescopic blocks 162 and the arc-shaped plates 163; when the three-way valve is longitudinally rotated and polished, the upper outlet pipe of the three-way valve moves along the arc surface of the arc plate 163 when rotating to the arc plate 163, and the telescopic spring rod 161 is pressed, so that the telescopic spring rod 161 can move back and forth.
The clamping mechanism 38 comprises spring rods 381, support blocks 382, roll shafts 383 and clamping plates 384, the spring rods 381 are symmetrically installed in the middle of the pressing frame 34, the support blocks 382 are installed on the movable ends of the spring rods 381, the support blocks 382 are connected with the pressing frame 34 in a sliding groove matching mode, the roll shafts 383 are installed on the support blocks 382 through pin shafts, the clamping plates 384 are installed on the roll shafts 383, and sand paper is installed on the outer end faces of the clamping plates 384; when the pressing frame 34 moves downwards, the clamping plate 384 rotates along the roller 383, and meanwhile the clamping plate 384 is tightly attached to the inner side face of the upper outlet of the three-way valve through the spring rod 381.
In addition, the invention also provides a specific use method of the three-way valve manufacturing and processing machine, which comprises the following steps:
s1, fixing the three-way valve, wherein the three-way valve to be processed is manually clamped between the rubber pressure blocks 28, so that the purpose of fixing the three-way valve is achieved;
s2, performing longitudinal grinding treatment, namely, longitudinally rotating the three-way valve by using the electric turntable 27, wherein an upper outlet pipe of the three-way valve penetrates through empty grooves on the base plate 14, the bottom plate 12 and the grinding plate 15, the telescopic mechanism 16 performs telescopic motion along with the rotation of the three-way valve and is always tightly attached to the three-way valve, and the grinding plate 15 and the sand paper on the telescopic mechanism 16 perform grinding treatment on the three-way valve;
s3, transverse polishing, namely, starting the air cylinder 32, driving the pressing frame 34 through the transverse plate 31 to enable the pressing frame 34 to be attached to the three-way valve, meanwhile, utilizing the clamping mechanism 38 to be attached to the inner side surface of the upper outlet of the three-way valve, utilizing the electric slide block 23 to do circular motion along the slide rod 22 to enable the three-way valve to transversely rotate, and polishing the three-way valve through the sand paper on the pressing frame 34 and the clamping plate 384;
and S4, after the grinding is finished, manually taking out the three-way valve.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a processing machinery is made to three-way valve, includes strutting arrangement (1), fixing device (2) and closing device (3), its characterized in that: the section of the supporting device (1) is of a Chinese character 'hui' structure, a fixing device (2) is installed on the inner end face of the lower side of the supporting device (1), and a pressing device (3) is installed on the inner end face of the upper side of the supporting device (1); wherein:
the supporting device (1) comprises a supporting plate (11), a bottom plate (12), a top plate (13), a base plate (14), a polishing plate (15) and a telescopic mechanism (16), wherein the supporting plate (11) is symmetrically arranged on the upper end surface of the bottom plate (12), the top plate (13) is arranged on the upper end surface of the supporting plate (11), the base plate (14) is arranged on the upper end surface of the bottom plate (12), the base plate (14) is of a disc-shaped structure, empty grooves are formed in the base plate (14), the bottom plate (12) and the polishing plate (15), sand paper is arranged on the upper end surface of the polishing plate (15), the telescopic mechanism (16) is symmetrically arranged in the empty groove of the base plate (14), and the polishing plate (15) is arranged on the outer end surface of;
the fixing device (2) comprises a chute frame (21), a slide rod (22), an electric slider (23), an outer plate (24), a limiting plate (25), a limiting spring (26), an electric turntable (27) and a rubber pressing block (28), wherein the chute frame (21) is symmetrically installed on the upper end surface of the backing plate (14), the section of the chute frame (21) is of a circular ring structure, the slide rod (22) is installed on the chute frame (21), the electric slider (23) is installed on the slide rod (22), the electric slider (23) is connected with the chute frame (21) in a sliding fit manner, the outer plate (24) is installed on the outer end surface of the electric slider (23), the limiting plate (25) is symmetrically installed on the outer plate (24) in a sliding fit manner, the electric turntable (27) is installed on the outer end surface of the limiting plate (25), the electric turntable (27) is connected with the outer plate (24) through the limiting spring (, a rubber pressing block (28) is arranged on the outer end face of the electric turntable (27), and the section of the rubber pressing block (28) is of a trapezoidal structure;
the pressing device (3) comprises a transverse plate (31), an air cylinder (32), a supporting block (33), a pressing frame (34), a sliding plate (35), a spring (36), a spring supporting rod (37) and a clamping mechanism (38), roof (13) under the terminal surface on the symmetry install cylinder (32), install diaphragm (31) on cylinder (32) movable end, supporting shoe (33) are installed to the symmetry on the terminal surface under diaphragm (31), be provided with the ear seat on supporting shoe (33) lateral surface, install sliding plate (35) on the ear seat, terminal surface mid-mounting has spring branch (37) under diaphragm (31), install on spring branch (37) movable end and sliding plate (35) under the terminal surface and compress tightly frame (34), compress tightly the transversal circular structure of personally submitting of frame (34), compress tightly frame (34) longitudinal section is protruding type structure, install abrasive paper under compress tightly frame (34) on the terminal surface, it installs chucking mechanism (38) to compress tightly frame (34) middle part symmetry.
2. A three-way valve manufacturing and processing machine according to claim 1, wherein: telescopic machanism (16) including telescopic spring pole (161), flexible piece (162) and arc (163), the dead slot of backing plate (14) in the symmetry install telescopic spring pole (161), install flexible piece (162) on telescopic spring pole (161) movable end, flexible piece (162) cross-section is L type structure, flexible piece (162) are connected with board (15) of polishing through spout complex mode, install arc (163) on flexible piece (162) the outer terminal surface, install abrasive paper on flexible piece (162) and arc (163) up end.
3. A three-way valve manufacturing and processing machine according to claim 1, wherein: chucking mechanism (38) including spring bar (381), piece (382), roller (383) and cardboard (384), hold down frame (34) middle part symmetry install spring bar (381), install on spring bar (381) movable end piece (382), piece (382) are connected with hold down frame (34) through sliding tray complex mode, install roller (383) through the round pin axle on piece (382), install cardboard (384) on roller (383), install abrasive paper on cardboard (384) the outer terminal surface.
4. A three-way valve manufacturing and processing machine according to claim 2, wherein: the cross section of the arc-shaped plates (163) is of a crescent structure, and the distance between the outermost ends of the two arc-shaped plates is larger than the outer diameter of the pipeline for processing the three-way valve.
5. A three-way valve manufacturing and processing machine according to claim 1, wherein: the cross sections of the empty grooves formed in the backing plate (14), the bottom plate (12) and the polishing plate (15) are of semicircular structures.
6. A three-way valve manufacturing and processing machine according to claim 3, wherein: the lower end section of the clamping plate (384) is of a semicircular structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911034625.9A CN110732927B (en) | 2019-10-29 | 2019-10-29 | Three-way valve manufacturing, processing and treating machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911034625.9A CN110732927B (en) | 2019-10-29 | 2019-10-29 | Three-way valve manufacturing, processing and treating machine |
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| Publication Number | Publication Date |
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| CN110732927A CN110732927A (en) | 2020-01-31 |
| CN110732927B true CN110732927B (en) | 2020-09-25 |
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| CN201911034625.9A Active CN110732927B (en) | 2019-10-29 | 2019-10-29 | Three-way valve manufacturing, processing and treating machine |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111468893A (en) * | 2020-04-07 | 2020-07-31 | 郭亚亚 | Method for integrally molding and pouring metal shell of pipeline communicated valve |
| CN113334180B (en) * | 2021-08-02 | 2021-10-26 | 江苏沂人智能制造科技有限公司 | Copper pipe joint surface finish machining machinery |
| CN116276435B (en) * | 2023-03-28 | 2023-09-19 | 浙江锋源仪表有限公司 | Multi-angle polishing equipment for valve production |
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| US10708569B2 (en) * | 2016-09-29 | 2020-07-07 | Eric Wilson | Turbine-Powered Pool Scrubber |
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| JPH11320408A (en) * | 1998-05-14 | 1999-11-24 | Topcon Corp | Method and device for removing polishing foams from automatic lens edger |
| CN201823937U (en) * | 2010-09-25 | 2011-05-11 | 安徽新源石油化工技术开发有限公司 | Three-way beveling machine |
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| CN110732927A (en) | 2020-01-31 |
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