CN106903536A - One kind is used for tubing work piece holder clamping means - Google Patents
One kind is used for tubing work piece holder clamping means Download PDFInfo
- Publication number
- CN106903536A CN106903536A CN201710206456.7A CN201710206456A CN106903536A CN 106903536 A CN106903536 A CN 106903536A CN 201710206456 A CN201710206456 A CN 201710206456A CN 106903536 A CN106903536 A CN 106903536A
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- CN
- China
- Prior art keywords
- workpiece
- pressure
- hydraulic
- connecting shaft
- hydraulic pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/12—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for securing to a spindle in general
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- 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
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
- B23Q17/002—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring the holding action of work or tool holders
- B23Q17/005—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring the holding action of work or tool holders by measuring a force, a pressure or a deformation
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jigs For Machine Tools (AREA)
Abstract
It is used for tubing work piece holder clamping means the invention discloses one kind, fixture includes connecting shaft, hydraulic oil device, the expanding mechanism of hydraulic pressure, displacement detector, pressure-detecting device and host computer, wherein, one end of the connecting shaft is connected with machine tool chief axis, the other end of connecting shaft is uniformly arranged the expanding mechanism of multiple hydraulic pressure along the circumference of connecting shaft at grade, and multiple expanding mechanisms of hydraulic pressure are supported on the madial wall of workpiece and clamp workpiece support.The present invention is clamped by the expanding mechanism of several hydraulic pressure to workpiece, and workpiece is detected by double check mechanism, it is ensured that the accurate clamping to workpiece.
Description
Technical field
It is used for tubing work piece holder clamping means the present invention relates to one kind.
Background technology
Jig can be divided into following a few classes by specialization classification：
1st, universal fixturing.Universal fixturing refers to normalised, can be used to process the fixture of different workpieces within the specific limits.
For example, scroll chuck and four-jaw chuck, flat-nose pliers, dividing head and rotary table on milling machine etc. on lathe.This kind of folder
Tool is general to be produced by professional factory, and user is supplied to frequently as machine tool accessories.Wide adaptability is characterized in, low production efficiency is main
Will be suitable for single-piece, the production of small lot.
2nd, special fixture.Special fixture refers to certain procedure and the fixture that specially designs for aiming at a certain workpiece.Its feature
It is compact conformation, operation is rapid, convenient, laborsaving, it is ensured that machining accuracy and production efficiency higher, but manufactures and designs the cycle
More long, manufacturing expense is also higher.When change of product, fixture will be scrapped due to that cannot reuse.Product is only applicable to fix
And in the larger production of batch.
3rd, general flexible jig and modular fixture.Being characterized in the subelement of fixture can change, and partial devices can be with
Adjustment, to adapt to the processing of different parts.For similar part processed in batches used by fixture, referred to as modular fixture.It is general
Flexible jig is compared with modular fixture, and processing object is not bery clear and definite, and the scope of application is wider.
4th, built-up jig.Built-up jig refer to by the processing request of part, by a set of prior standard component for having manufactured and
The fixture that part assembles.Manufactured by specialized factory, be characterized in flexible and changeable, versatility is strong, the manufacturing cycle is short, element energy
Reusability, is particularly well-suited to the trial-production and jobbing work of new product.
5th, pallet.Pallet is a kind of fixture used on transfer matic.The fixture should play clamping workpiece
Effect, be integrally formed with workpiece move on to next station from a station along transfer matic again, carry out different operations plus
Work.
Because itself work characteristics of all kinds of lathes and structure type are different, the structure to clamp is also correspondingly carried
Different requirements are gone out.Different by the lathe for being used, fixture can be divided into again：Turning attachment, fraise jig, drill jig, boring
Bed fixture, fixture for grinding machine, gear machine fixture and other jigs etc..
It is different according to the clamping power source that fixture is used, can be divided into：Manual, air-actuated jaw, hydraulically operated fixture, gas-liquid
Fixture, electric fixture, magnetic fixture, vacuum fixture etc..
Jig has the effect that：
1st, machining accuracy is ensured.Installed using fixture, the mutual alignment between workpiece and lathe, cutter can be accurately determined,
The positional precision of workpiece is ensured, is not influenceed by workman's technical merit that its machining accuracy is high and stable by fixture.
2nd, productivity ratio, reduces cost are improved.Fixture clamping workpiece is used, workpiece just can be made promptly to position and press from both sides without centering
Tightly, unproductive time is significantly reduced；The rigidity of workpiece is improve with fixture clamping workpiece, therefore cutting data can be increased；Can
To use more than one piece, multi-station clamp clamping workpiece, and efficient clamp system is used, these factors are conducive to improving work production
Rate.In addition, after using fixture, product quality stabilization, percent defective declines, the workman that industrial grade can be arranged relatively low, it will be apparent that
Reduce production cost.
3rd, the processing range of lathe is expanded.Can change the purposes of former lathe using special fixture and expand the use of lathe
Scope, realizes one-machine-multi-function.For example, after installing boring template fixture on lathe or radial drilling machine, it is possible to which box body hole system is carried out
Boring is processed；Also lathe can be changed into broaching machine by special fixture to use, to give full play to the effect of universal machine tools.
4th, the labour intensity of workman is mitigated.With fixture clamping workpiece easily and fast, when using the clamping dress such as pneumatic, hydraulic pressure
When putting, the labour intensity of workman can be mitigated.
Fixture on current lathe is varied, but no matter is forever consistent, positioning accurate using how fixture standard
Degree requires that high, clamping is convenient, can fully demonstrate labor productivity, saves labor operations intensity of work personnel etc..
The U of Chinese utility model patent specification CN 203792068 disclose a kind of jig of such a, including
Clamp body and angle bar, the angle bar are provided with the fishbolt for clamping the clamp body, and the fishbolt is cased with double spiral shells
Mother, one end of the fishbolt is machined with spheroid with holes, and the other end of the fishbolt is cased with wear block, the folder
Particularly set fluted, the wear block is resisted against in the groove.The utility model by setting groove on clamp body,
Wear block is set with fishbolt front end, and is provided with double nut, substantially increase the structural stability of fixture, work more may be used
Lean on, can also be by screwing fishbolt in the ball that metallic rod is penetrated spheroid, it is more laborsaving, convenient to operate, and reduces work
The workload of people.But this fixture needs manpower to step up, and dynamics crosses conference and damages clamped article.
The U of Chinese utility model patent specification CN 203254205 are disclosed and so know clearly a kind of jig.This practicality
New drip irrigation device is：A kind of jig, mainly including taper shank, angle bar and clamp body, described taper shank and lathe
Spindle hole matches, and the bottom of the taper shank is provided with screw mandrel, and the top of taper shank is provided with taper shank axis in 90 ° of angle bar, the angle bar
Screwed hole is provided with vertical wall, described clamp body is fixed by the binding nut matched with angle bar upper screwed hole, the clamp body
Inner side be provided with groove.The utility model design is simple and easy for installation, is mainly used in the process of cylindrical workpiece.
But this fixture needs manpower to step up, and dynamics crosses conference and damages clamped article.
The content of the invention
It is applied to tubing work piece holder clamping means it is an object of the invention to provide one kind, it is expanding by several hydraulic pressure
Mechanism is clamped to workpiece, and workpiece is detected by double check mechanism, it is ensured that the accurate clamping to workpiece.
The purpose of the present invention is achieved through the following technical solutions：
One kind is used for tubing work piece holder clamping means, and fixture includes connecting shaft, hydraulic oil device, the expanding mechanism of hydraulic pressure, displacement
Detection means, pressure-detecting device and slave computer, wherein, one end of the connecting shaft is connected with machine tool chief axis, connecting shaft
The other end is uniformly arranged the expanding mechanism of multiple hydraulic pressure, multiple expanding mechanism supports of hydraulic pressure along the circumference of connecting shaft at grade
Workpiece support is clamped on the madial wall of workpiece；In connecting shaft along connecting shaft it is axially arranged have main oil gallery and several
The oil duct unit for setting is connected with the main oil gallery, an expanding mechanism of hydraulic pressure, each hydraulic pressure are equipped with each oil duct unit
Expanding mechanism includes piston, connecting rod and elastic electromagnetic plate, wherein, piston is arranged in oil duct unit, and piston passes through the company
Bar is connected with the elastic electromagnetic plate being arranged at outside connecting shaft；Institute's displacement sensing device is used for real-time detection elasticity electromagnetic plate
With the displacement between workpiece madial wall；The pressure-detecting device be used for real-time detection elasticity electromagnetic plate and workpiece madial wall it
Between support force；The slave computer and the hydraulic oil device, displacement detector, pressure-detecting device and elastic electromagnetic plate
Control connection；
Comprise the following steps：
The first step, slave computer send instructions to hydraulic oil device, and be injected into hydraulic oil in main oil gallery by hydraulic oil device, some liquid
Companding footpath mechanism is supported clamping to workpiece simultaneously；
Second step, when complete clamp after, pressure-detecting device detects the support between the expanding mechanism of each hydraulic pressure and workpiece inner wall
Pressure, slave computer is transferred to by pressure signal, and support force is shown on slave computer, facilitates operator to read, if certain hydraulic pressure expands
There is empty contact phenomena in footpath mechanism or support force is not enough, then the support force value of its display can be smaller, now by slave computer
Control hydraulic oil device is finely adjusted to the pressure of hydraulic oil, it is ensured that the accurate clamping to workpiece；
3rd step, in cutting process is carried out to workpiece, displacement detector to the expanding mechanism of hydraulic pressure and workpiece inner wall it
Between displacement carry out real-time detection, when displacement detector detects the expanding mechanism of workpiece opposing hydraulic to be slid, will
Displacement signal is sent to slave computer, and slave computer starts elastic electromagnetic plate fixes absorption of workpieces.
The expanding mechanism of hydraulic pressure includes 3 ~ 6.
The material of the elastic electromagnetic plate is potassium steel.
Institute's displacement sensing device is grating displacement sensor.
The pressure-detecting device is the pressure sensor being arranged in elastic electromagnetic plate.
The pressure-detecting device is the pressure sensor being arranged in the hydraulic circuit of hydraulic oil device.
Technical solution of the present invention has following beneficial effect：
1st, the expanding mechanism of hydraulic pressure in this clamping means can meet the clamping of different tube diameters workpiece；
2nd, the expanding mechanism of multiple hydraulic pressure in clamping device of the present invention is arranged circumferentially in same level around workpiece, multiple
The expanding mechanism of hydraulic pressure moves simultaneously, makes multiple depression bars to workpiece while being clamped, and overcomes single institution and is easily sent out with workpiece
Raw virtual connection touch or skidding problem；
3rd, the present invention is used for tubing work piece holder clamping means by setting clamping force of the pressure sensor to the expanding mechanism of hydraulic pressure
Detected and the displacement by displacement detector to workpiece is carried out real-time detection double insurance, it is to avoid virtual connection occurred and touches
Or the phenomenon of insufficient clamping force, it is ensured that the accurate clamping to workpiece.
Brief description of the drawings
Fig. 1 is the top view of clamping device；
Fig. 2 is the sectional view of the expanding mechanism of single hydraulic pressure；
Fig. 3 is slave computer control circuit theory diagrams.
Wherein, 1 is main oil gallery；2 is oil duct unit；3 is piston；4 is connecting rod；5 is elastic electromagnetic plate；6 is connecting shaft；7
It is workpiece.
Specific embodiment
Technical scheme is described in more detail with reference to specific embodiment and Figure of description.
As shown in figure 1, a kind of be used for tubing work piece holder clamping means, fixture includes connecting shaft, hydraulic oil device, hydraulic pressure
Expanding mechanism, displacement detector, pressure-detecting device and host computer, wherein, one end of the connecting shaft and machine tool chief axis
Connection, the other end of connecting shaft is uniformly arranged the expanding mechanism of multiple hydraulic pressure, multiple liquid along the circumference of connecting shaft at grade
Companding footpath mechanism supports clamp workpiece support on the madial wall of workpiece；There is main oil along the axially arranged of connecting shaft in connecting shaft
Road and several connected with the main oil gallery set oil duct unit, a hydraulic pressure is equipped with each oil duct unit expanding
Mechanism, the expanding mechanism of each hydraulic pressure includes piston, connecting rod and elastic electromagnetic plate, wherein, piston is arranged in oil duct unit, living
Plug is connected by the connecting rod with the elastic electromagnetic plate being arranged at outside connecting shaft；Institute's displacement sensing device is used for inspection in real time
The displacement surveyed between elastic electromagnetic plate and workpiece madial wall；The pressure-detecting device be used for real-time detection elasticity electromagnetic plate with
Support force between workpiece madial wall；The slave computer and the hydraulic oil device, displacement detector, pressure-detecting device with
And elastic electromagnetic plate control connection；Including following steps：
The first step, slave computer send instructions to hydraulic oil device, and be injected into hydraulic oil in main oil gallery by hydraulic oil device, some liquid
Companding footpath mechanism is supported clamping to workpiece simultaneously；
Second step, when complete clamp after, pressure-detecting device detects the support between the expanding mechanism of each hydraulic pressure and workpiece inner wall
Pressure, slave computer is transferred to by pressure signal, and support force is shown on slave computer, facilitates operator to read, if certain hydraulic pressure expands
There is empty contact phenomena in footpath mechanism or support force is not enough, then the support force value of its display can be smaller, now by slave computer
Control hydraulic oil device is finely adjusted to the pressure of hydraulic oil, it is ensured that the accurate clamping to tubing workpiece；
3rd step, in cutting process is carried out to workpiece, displacement detector to the expanding mechanism of hydraulic pressure and workpiece inner wall it
Between displacement carry out real-time detection, when displacement detector detects the expanding mechanism of workpiece opposing hydraulic to be slid, will
Displacement signal is sent to slave computer, and slave computer starts elastic electromagnetic plate fixes absorption of workpieces.
As a kind of further preferred scheme for tubing work piece holder clamping means technical scheme of the invention, the liquid
Companding footpath mechanism includes 3 ~ 6.
As a kind of further preferred scheme for tubing work piece holder clamping means technical scheme of the invention, the bullet
The material selection high resiliency manganese steel piece of property electromagnetic plate.
As a kind of further preferred scheme for tubing work piece holder clamping means technical scheme of the invention, institute's rheme
Shifting detection means is grating displacement sensor.
As a kind of further preferred scheme for tubing work piece holder clamping means technical scheme of the invention, the pressure
Force checking device is the pressure sensor being arranged in elastic electromagnetic plate.
As a kind of further preferred scheme for tubing work piece holder clamping means technical scheme of the invention, the pressure
Force checking device is the pressure sensor being arranged in the hydraulic circuit of hydraulic oil device.
Claims (6)
1. a kind of to be used for tubing work piece holder clamping means, fixture includes connecting shaft, hydraulic oil device, the expanding mechanism of hydraulic pressure, position
Detection means, pressure-detecting device and slave computer are moved, wherein, one end of the connecting shaft is connected with machine tool chief axis, connecting shaft
The other end be uniformly arranged the expanding mechanism of multiple hydraulic pressure, multiple expanding mechanism's branch of hydraulic pressure along the circumference of connecting shaft at grade
Support and clamp workpiece support on the madial wall of workpiece；There is main oil gallery and some along the axially arranged of connecting shaft in connecting shaft
It is individual that the oil duct unit for setting is connected with the main oil gallery, an expanding mechanism of hydraulic pressure, each liquid are equipped with each oil duct unit
Companding footpath mechanism includes piston, connecting rod and elastic electromagnetic plate, wherein, piston is arranged in oil duct unit, and piston is by described
Connecting rod is connected with the elastic electromagnetic plate being arranged at outside connecting shaft；Institute's displacement sensing device is used for real-time detection elasticity electromagnetism
Displacement between piece and workpiece madial wall；The pressure-detecting device is used for real-time detection elasticity electromagnetic plate and workpiece madial wall
Between support force；The slave computer and the hydraulic oil device, displacement detector, pressure-detecting device and elastic electromagnetism
Piece control connection；
It is characterised in that it includes following steps：
The first step, slave computer send instructions to hydraulic oil device, and be injected into hydraulic oil in main oil gallery by hydraulic oil device, some liquid
Companding footpath mechanism is supported clamping to workpiece simultaneously；
Second step, when complete clamp after, pressure-detecting device detects the support between the expanding mechanism of each hydraulic pressure and workpiece inner wall
Pressure, slave computer is transferred to by pressure signal, and support force is shown on slave computer, facilitates operator to read, if certain hydraulic pressure expands
There is empty contact phenomena in footpath mechanism or support force is not enough, then the support force value of its display can be smaller, now by slave computer
Control hydraulic oil device is finely adjusted to the pressure of hydraulic oil, it is ensured that the accurate clamping to workpiece；
3rd step, in cutting process is carried out to workpiece, displacement detector to the expanding mechanism of hydraulic pressure and workpiece inner wall it
Between displacement carry out real-time detection, when displacement detector detects the expanding mechanism of workpiece opposing hydraulic to be slid, will
Displacement signal is sent to slave computer, and slave computer starts elastic electromagnetic plate fixes absorption of workpieces.
2. it is according to claim 1 for tubing work piece holder clamping means, it is characterised in that the expanding mechanism of hydraulic pressure
Including 3 ~ 6.
3. it is according to claim 1 for tubing work piece holder clamping means, it is characterised in that the elastic electromagnetic plate
Material is potassium steel.
4. it is according to claim 1 for tubing work piece holder clamping means, it is characterised in that institute's displacement sensing device
It is grating displacement sensor.
5. it is according to claim 1 for tubing work piece holder clamping means, it is characterised in that the pressure-detecting device
It is the pressure sensor being arranged in elastic electromagnetic plate.
6. it is according to claim 1 for tubing work piece holder clamping means, it is characterised in that the pressure-detecting device
It is the pressure sensor being arranged in the hydraulic circuit of hydraulic oil device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710206456.7A CN106903536A (en) | 2017-03-31 | 2017-03-31 | One kind is used for tubing work piece holder clamping means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710206456.7A CN106903536A (en) | 2017-03-31 | 2017-03-31 | One kind is used for tubing work piece holder clamping means |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106903536A true CN106903536A (en) | 2017-06-30 |
Family
ID=59195384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710206456.7A Pending CN106903536A (en) | 2017-03-31 | 2017-03-31 | One kind is used for tubing work piece holder clamping means |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106903536A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108161536A (en) * | 2018-03-26 | 2018-06-15 | 上海振华重工电气有限公司 | A kind of positioning tool and its alignment adjusting method of end of shipping and reselling on another market for adjustment |
| CN108621011A (en) * | 2018-06-04 | 2018-10-09 | 芜湖市晨曦新型建材科技有限公司 | A kind of water purifier burnishing device |
| CN109500271A (en) * | 2018-11-26 | 2019-03-22 | 温州职业技术学院 | Thin-wall tube resistance clamp energetically |
| CN110877254A (en) * | 2019-12-09 | 2020-03-13 | 江苏亿豪塑业股份有限公司 | Polytetrafluoroethylene pipe coupler with inner leveling function |
| CN111015309A (en) * | 2019-12-17 | 2020-04-17 | 中航国际航空发展有限公司 | Pneumatic supporting tool inside barrel part |
| CN111530865A (en) * | 2020-05-10 | 2020-08-14 | 贾小帅 | Pipeline inner wall cleaning device based on reaction force principle |
| CN112496372A (en) * | 2021-01-07 | 2021-03-16 | 史晶晶 | Double-shaft expandable mandrel |
| WO2021114252A1 (en) * | 2019-12-12 | 2021-06-17 | 朱微 | Pipeline internally-tangent-type clamp |
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| CN202752904U (en) * | 2012-08-31 | 2013-02-27 | 王明泉 | Marine cylinder sleeve turning clamp |
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| CN105065375A (en) * | 2015-09-02 | 2015-11-18 | 哈尔滨工业大学 | Electro-hydraulic servo pressure device |
| CN205166430U (en) * | 2015-12-03 | 2016-04-20 | 芜湖天金机械有限公司 | Outer star gear inner chamber concentricity thimble of universal joint |
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| DE19756215A1 (en) * | 1997-09-03 | 1999-07-01 | Hohenstein Vorrichtungsbau | Quick change mounting for machine tool components |
| CN103358144A (en) * | 2012-04-05 | 2013-10-23 | 中国石油天然气集团公司 | Internal expanding type clamping mechanism of large-caliber hot bend bevelling machine |
| CN202752904U (en) * | 2012-08-31 | 2013-02-27 | 王明泉 | Marine cylinder sleeve turning clamp |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108161536A (en) * | 2018-03-26 | 2018-06-15 | 上海振华重工电气有限公司 | A kind of positioning tool and its alignment adjusting method of end of shipping and reselling on another market for adjustment |
| CN108161536B (en) * | 2018-03-26 | 2023-11-14 | 上海振华重工电气有限公司 | Positioning tool for adjusting end part of rotary pin and positioning adjustment method thereof |
| CN108621011A (en) * | 2018-06-04 | 2018-10-09 | 芜湖市晨曦新型建材科技有限公司 | A kind of water purifier burnishing device |
| CN109500271A (en) * | 2018-11-26 | 2019-03-22 | 温州职业技术学院 | Thin-wall tube resistance clamp energetically |
| CN110877254A (en) * | 2019-12-09 | 2020-03-13 | 江苏亿豪塑业股份有限公司 | Polytetrafluoroethylene pipe coupler with inner leveling function |
| CN110877254B (en) * | 2019-12-09 | 2020-10-09 | 江苏亿豪塑业股份有限公司 | Polytetrafluoroethylene pipe coupler with inner leveling function |
| WO2021114252A1 (en) * | 2019-12-12 | 2021-06-17 | 朱微 | Pipeline internally-tangent-type clamp |
| CN111015309A (en) * | 2019-12-17 | 2020-04-17 | 中航国际航空发展有限公司 | Pneumatic supporting tool inside barrel part |
| CN111530865A (en) * | 2020-05-10 | 2020-08-14 | 贾小帅 | Pipeline inner wall cleaning device based on reaction force principle |
| CN112496372A (en) * | 2021-01-07 | 2021-03-16 | 史晶晶 | Double-shaft expandable mandrel |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20170630 |