CN202097673U - Ultra-precise micro-hole abrasive flow polishing device - Google Patents

Ultra-precise micro-hole abrasive flow polishing device Download PDF

Info

Publication number
CN202097673U
CN202097673U CN2011201530064U CN201120153006U CN202097673U CN 202097673 U CN202097673 U CN 202097673U CN 2011201530064 U CN2011201530064 U CN 2011201530064U CN 201120153006 U CN201120153006 U CN 201120153006U CN 202097673 U CN202097673 U CN 202097673U
Authority
CN
China
Prior art keywords
abrasive
cylinder
anchor clamps
micro hole
hydraulic cylinder
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.)
Expired - Fee Related
Application number
CN2011201530064U
Other languages
Chinese (zh)
Inventor
刘薇娜
杨立峰
李俊烨
刘志刚
赵磊
Original Assignee
刘薇娜
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 刘薇娜 filed Critical 刘薇娜
Priority to CN2011201530064U priority Critical patent/CN202097673U/en
Application granted granted Critical
Publication of CN202097673U publication Critical patent/CN202097673U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

The utility model discloses an ultra-precise micro-hole abrasive flow polishing device, comprising two hydraulic cylinders, two grinding cylinders and a clamp, wherein the first hydraulic cylinder is connected with the second hydraulic cylinder in a driving way; the two hydraulic cylinders are connected with the two grinding cylinders in a driving way; a piston of each hydraulic cylinder drives the grinding cylinder to reciprocate; the clamp is arranged between the two grinding cylinders; the clamp is provided with a micro-hole runner; the clamp is fixedly provided with the machining part; and the two grinding cylinders are communicated with the micro-hole runner of the clamp and the micro-hole of the machining part. The ultra-precise micro-hole abrasive flow polishing device is characterized by also comprising a U-shaped pipe, a straight pipe, a bidirectional valve, a check valve and two clamps; the two clamps are connected between the first grinding cylinder and the second grinding cylinder by the U-shaped pipe; the check valve is connected in series in the middle of the U-shaped pipe; and the bidirectional valve is connected in parallel in the middle of the U-shaped pipe by the straight pipe. The ultra-precise micro-hole abrasive flow polishing device can be used for machining two workpieces simultaneously at one step and can be used for machining a plurality of workpieces simultaneously, and has a simple structure and can be manufactured and operated easily.

Description

Ultraprecise micro hole abrasive Flow burnishing device
Technical field
The utility model belongs to the Ultraprecision Machining field, relates to a kind of ultraprecise micro hole abrasive Flow burnishing device, is specially adapted to the micro hole ultraprecise processing of part, can obtain the micro hole nano-precision surface of part.
Background technology
In recent years; Both at home and abroad the abrasive Flow Machining technology is applied to solve the complex contour such as the trickle rifling ultraprecise processing of gun barrel endoporus, the processing of auto parts and components ultraprecise, civilian medicine equipment of micropore, the processing of microflute ultraprecise, the weaponry of the products such as shaping dies of micro flow channel checkout equipment, biochip and LGP and has the inner surface refine of micro hole water passage surface and high forming accuracy; Obtain the test specimen surface of surface of good refine effect and level and smooth no burr, highlighted the importance of abrasive Flow Machining technology.But existing ultraprecise micro hole abrasive Flow burnishing device complex structure is difficult for making, and operation is difficult, costs an arm and a leg.
Summary of the invention
The utility model discloses a kind of ultraprecise micro hole abrasive Flow burnishing device, to solve the micro hole abrasive Flow burnishing device complex structure that needs part in the prior art, is difficult for making, and operation is difficult, and problem such as cost an arm and a leg.
The utility model ultraprecise micro hole abrasive Flow burnishing device comprises workbench, Hydraulic Station, first hydraulic cylinder, the first abrasive material cylinder, second hydraulic cylinder and the second abrasive material cylinder, anchor clamps; Two hydraulic cylinders and two abrasive material cylinders are fixed on the workbench through bearing; Hydraulic Station is connected with second Driven by Hydraulic Cylinder with first hydraulic cylinder; First hydraulic cylinder drives with the first abrasive material cylinder and is connected; Second hydraulic cylinder drives with the second abrasive material cylinder and is connected, and the piston of first hydraulic cylinder drives the first abrasive material cylinder reciprocating motion of the pistons, and the piston of second hydraulic cylinder drives the second abrasive material cylinder reciprocating motion of the pistons; Anchor clamps are installed and are connected between the first abrasive material cylinder, the second abrasive material cylinder, the clamps processing parts, and the first abrasive material cylinder, the second abrasive material cylinder are connected with the micro hole of anchor clamps micro hole runner and processing parts; It is characterized in that also comprising U-shaped pipe, straight pipe, to two on valve, check valve, anchor clamps; Two anchor clamps are installed by the U-shaped pipe and are connected between the first abrasive material cylinder, the second abrasive material cylinder; Two-way valve is installed in series and is connected in the middle of the U-shaped pipe; Check valve is in parallel installed with between the U-shaped pipe by straight pipe.
First processing parts that the utlity model has micro hole is connected with the anchor clamps installation; The first abrasive material cylinder is connected with the micro hole of anchor clamps micro hole runner and processing parts; Anchor clamps comprise also goes up anchor clamps and lower clamp, and last anchor clamps are connected with the U-shaped pipe through screw thread, and lower clamp is fixed on the abrasive material cylinder, and the processing parts of micro hole is packed into and gone up in the anchor clamps, and anchor clamps connect with the abrasive material cylinder mutually, and last lower clamp and abrasive material cylinder are fixed together through bolt; The abrasive Flow of the first abrasive material cylinder directly gets into the U-shaped pipe after through the micro hole of processing parts and flows in the second abrasive material cylinder.Add man-hour carrying out abrasive flows; Piston through hydraulic cylinder drives the motion of abrasive material cylinder piston; Piston promotes the abrasive Flow part surface to be machined of flowing through and realizes workpiece lumen and micro hole runner are processed under pressure; Realize the cross bore deburring and reduce the micro hole surface roughness, thereby obtain desirable ultraprecise processing effect.For the abrasive Flow polishing of micro hole, abrasive Flow liquid is one-way flow, does not possess reverse flow; Abrasive Flow in the second abrasive material cylinder flows back in the first abrasive material cylinder again, realizes through check valve 1, thereby has realized continuous polishing.
Seal groove is left in the both sides of lower clamp, and sealing ring is housed in the seal groove, can prevent that abrasive material from leaking;
The abrasive material inflow side that the utility model lower clamp is connected with the micro hole of micro hole machining part is a bellmouth, and when abrasive material cylinder piston extruding abrasive material, abrasive material can flow into the micro hole inner cavity of component rapidly accurately, guarantees carrying out smoothly of processing like this.
The course of work is following:
When carrying out abrasive Flow polishing processing micro hole, at first close the check valve on the straight pipe, and open the two-way valve on the U-shaped pipe, start Hydraulic Station then.The power that Hydraulic Station provides travels forward the push rod of first hydraulic cylinder, thereby push rod drives the piston advances forward of the first abrasive material cylinder, and the abrasive Flow first processing parts aperture runner that anchor clamps are connected with anchor clamps of under the effect of piston, flowing through carries out ultraprecise processing.The push rod of the piston of the second abrasive material cylinder and second hydraulic cylinder moves under the effect of squeeze pressure backward.After hydraulic cylinder reached range, Hydraulic Station stopped to provide power.At this moment; Should close the two-way valve on the U-shaped pipe, open the check valve on the straight pipe, the push rod that utilizes Hydraulic Station to control second hydraulic cylinder moves forward; The piston advances forward that drives the second abrasive material cylinder makes abrasive flows get back in the first abrasive material cylinder through straight pipe; The push rod of first hydraulic cylinder is got back to initial position, has so just accomplished the time processing circulation, then can carry out abrasive Flow Machining circulation next time according to process requirements.Generally, desire the surface accuracy that reaches required, need fabrication cycles repeatedly could realize.
The utility model advantage: once can process a workpiece; Also replaceable anchor clamps are processed a plurality of workpiece simultaneously.Simple in structure, make easily, easily operation.In polishing during than large diameter hole or big clearance surface, abrasive Flow liquid can two-way flow, realizes two parts of continuous polishing simultaneously, also can be through jig design special construction a plurality of parts of continuous polishing simultaneously.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is the utility model anchor clamps and mounting structure sketch map;
Among the figure: 1 check valve, 2 two-way valves, 3 first hydraulic cylinders, 4 first abrasive material cylinders, 5 anchor clamps, 6 processing parts, 7 second abrasive material cylinders, 8 second hydraulic cylinders, the last anchor clamps of 5a, 5b lower clamp, 5c bolt, 5d nut, 5e O type circle, 5f O type circle, 5g O type circle.
The specific embodiment
The embodiment of the utility model such as Fig. 1, shown in Figure 2: the utility model comprises workbench, bearing, Hydraulic Station, check valve 1, two-way valve 2, first hydraulic cylinder 3, the first abrasive material cylinder 4, anchor clamps 5, the second abrasive material cylinder 7, second hydraulic cylinder 8, U-shaped pipe, straight pipe; First hydraulic cylinder 3, the first abrasive material cylinder 4, the second abrasive material cylinder 7, second hydraulic cylinder 8 are fixed on the workbench through bearing; Hydraulic Station drives with second hydraulic cylinder 8 with first hydraulic cylinder 3 and is connected; First hydraulic cylinder 3 drives with the first abrasive material cylinder 4 and is connected; Second hydraulic cylinder 8 drives with the second abrasive material cylinder 7 and is connected, and the piston of first hydraulic cylinder 3 drives the first abrasive material cylinder, 4 reciprocating motions of the pistons, and the piston of second hydraulic cylinder 8 drives the second abrasive material cylinder, 7 reciprocating motions of the pistons; 5 two of anchor clamps, anchor clamps 5 are installed and are connected between the first abrasive material cylinder 4, the second abrasive material cylinder 7, and anchor clamps 5 have the micro hole runner; Anchor clamps 5 install and fix processing parts 6 atomizers, and the first abrasive material cylinder 4, the second abrasive material cylinder 7 are connected with the micro hole of anchor clamps 5 micro hole runners and processing parts 6 atomizers; Two anchor clamps 5 are installed by the U-shaped pipe and are connected between the first abrasive material cylinder 4, the second abrasive material cylinder 7; Two-way valve 2 is installed in series and is connected in the middle of the U-shaped pipe; Check valve 1 is in parallel installed with between the U-shaped pipe by straight pipe.
As shown in Figure 2: anchor clamps 5 comprise also goes up anchor clamps 5a and lower clamp 5b, and processing parts 6 atomizers are installed with anchor clamps 5 and are connected; Processing parts 6 atomizers are installed and are connected in the anchor clamps 5; Lower clamp 5b has the afterbody installing hole of processing parts 6 atomizers; Last anchor clamps 5a is connected with the U-shaped pipe through screw thread; Lower clamp 5b is fixed on the first abrasive material cylinder, 4 ends, the second abrasive material cylinder, 7 ends; Pack into and go up in the anchor clamps 5a in the top of processing parts 6 atomizers, the processing parts 6 atomizer afterbody installing hole degree of depth of lower clamp 5b equate with the tail height of processing parts 6 atomizers; Last anchor clamps 5a and lower clamp 5b are fixed together through bolt 5c, nut 5d with the first abrasive material cylinder 4, the second abrasive material cylinder 7 respectively together.Seal groove is left in the both sides of last anchor clamps 5a, lower clamp 5b, and sealing ring O type circle 5e, O type circle 5f, O type circle 5g are housed in the seal groove, can prevent that abrasive material from leaking; Influence is ground in order to avoid these positions receive in the position that hermetically-sealed construction sealing processing parts need not grind on the anchor clamps 5.Lower clamp 5b is a bellmouth with the abrasive material inflow side that the micro hole of processing parts 6 atomizers is connected, and the miner diameter end of bellmouth equates with processing parts 6 atomizer afterbody bore dias; When abrasive material cylinder piston extruding abrasive material, abrasive material can flow into the micro hole of part rapidly accurately, guarantees carrying out smoothly of processing like this.
Micropore abrasive Flow polishing process is following:
Add man-hour carrying out abrasive Flow micropore polishing; At first close the check valve 1 on the straight pipe; And the two-way valve 2 on the unlatching U-shaped pipe; The push rod of first hydraulic cylinder 3 travels forward, thereby push rod drives the piston advances forward of the first abrasive material cylinder 4, and abrasive Flow anchor clamps micro hole 6 runners of under the effect of piston, flowing through carry out ultraprecise processing to the micro hole of first processing parts, 6 atomizers.The push rod of the piston of the second abrasive material cylinder 7 and second hydraulic cylinder 8 moves under the effect of squeeze pressure backward.After hydraulic cylinder reaches range; Close the two-way valve 2 on the U-shaped pipe, the push rod of opening check valve 1, the second hydraulic cylinder 8 on the straight pipe moves forward; The piston advances forward that drives the second abrasive material cylinder 7 makes abrasive flows get back in the first abrasive material cylinder 4 through straight pipe; The push rod of first hydraulic cylinder 3 is got back to initial position, has so just accomplished the time processing circulation, then can carry out abrasive Flow Machining circulation next time according to process requirements.Generally, desire the surface accuracy that reaches required, need fabrication cycles repeatedly could realize.Embodiment through utility model can realize deburring and reduce the micro hole surface roughness, thereby obtain desirable ultraprecise processing effect.
Macropore abrasive Flow polishing process is following:
When polishing than large diameter hole or big clearance surface; Close check valve 1; First processing parts and second processing parts are installed in respectively in anchor clamps 5 and the anchor clamps 9 simultaneously; The push rod of first hydraulic cylinder 3 travels forward, thereby push rod drives the piston advances forward of the first abrasive material cylinder 4, and the abrasive flows in the first abrasive material cylinder 4 directly gets into the second abrasive material cylinder 7 through part in first processing parts---U-shaped pipe---anchor clamps 9 in the anchor clamps 5; The push rod of the piston of the second abrasive material cylinder 7 and second hydraulic cylinder 8 moves under the effect of squeeze pressure backward.After hydraulic cylinder reaches range; The push rod that drives second hydraulic cylinder 8 moves forward, and the piston advances forward that drives abrasive material cylinder 7 makes abrasive flows pass through anchor clamps 9 interior second processing parts---U-shaped pipe---anchor clamps, 5 interior parts and gets back in the first abrasive material cylinder 4, and the push rod of first hydraulic cylinder 3 is got back to initial position; So just accomplished the time processing circulation; Back and forth said process is realized two parts of continuous polishing simultaneously, also can be through a plurality of parts of jig design special construction while continuous polishing.
Another function that the utility model burnishing device also possesses; When polishing than large diameter hole or big clearance surface; Abrasive Flow liquid can two-way flow, at this moment closes check valve 1, the first processing parts and second processing parts and is installed in simultaneously respectively in first anchor clamps and second anchor clamps; Abrasive flows in the first abrasive material cylinder directly gets into the second abrasive material cylinder through part in part---U-shaped pipe---second anchor clamps in first anchor clamps; Back and forth said process is realized two parts of continuous polishing simultaneously, also can be through a plurality of parts of jig design special construction while continuous polishing.

Claims (3)

1. a ultraprecise micro hole abrasive Flow burnishing device comprises first hydraulic cylinder, the first abrasive material cylinder, second hydraulic cylinder and the second abrasive material cylinder, anchor clamps; First hydraulic cylinder drives with the first abrasive material cylinder and is connected, and second hydraulic cylinder drives with the second abrasive material cylinder and is connected, and the piston of first hydraulic cylinder drives the first abrasive material cylinder reciprocating motion of the pistons, and the piston of second hydraulic cylinder drives the second abrasive material cylinder reciprocating motion of the pistons; Anchor clamps are installed and are connected between the first abrasive material cylinder, the second abrasive material cylinder, and anchor clamps have the micro hole runner; Anchor clamps install and fix processing parts, and the first abrasive material cylinder, the second abrasive material cylinder are connected with the micro hole of anchor clamps micro hole runner and processing parts; It is characterized in that: also comprise two of U-shaped pipes, straight pipe, two-way valve, check valve, anchor clamps; Two anchor clamps are installed by the U-shaped pipe and are connected between the first abrasive material cylinder, the second abrasive material cylinder; Check valve is installed in series and is connected in the middle of the U-shaped pipe; Two-way valve is in parallel installed with between the U-shaped pipe by straight pipe.
2, ultraprecise micro hole abrasive Flow burnishing device according to claim 1; It is characterized in that: the part with micro hole is installed in the anchor clamps; Anchor clamps connect with the abrasive material cylinder mutually, and the abrasive Flow of the first abrasive material cylinder directly gets into the U-shaped pipe after through the micro hole of processing parts and flows in the second abrasive material cylinder.
3, ultraprecise micro hole abrasive Flow burnishing device according to claim 1 and 2, it is characterized in that: anchor clamps comprise anchor clamps, lower clamp; Last anchor clamps are connected with the U-shaped pipe through screw thread, and lower clamp is fixed on the abrasive material cylinder; Seal groove is left in the both sides of lower clamp, and sealing ring is housed in the seal groove, prevents that abrasive material from leaking.
CN2011201530064U 2011-05-15 2011-05-15 Ultra-precise micro-hole abrasive flow polishing device Expired - Fee Related CN202097673U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011201530064U CN202097673U (en) 2011-05-15 2011-05-15 Ultra-precise micro-hole abrasive flow polishing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011201530064U CN202097673U (en) 2011-05-15 2011-05-15 Ultra-precise micro-hole abrasive flow polishing device

Publications (1)

Publication Number Publication Date
CN202097673U true CN202097673U (en) 2012-01-04

Family

ID=45383706

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011201530064U Expired - Fee Related CN202097673U (en) 2011-05-15 2011-05-15 Ultra-precise micro-hole abrasive flow polishing device

Country Status (1)

Country Link
CN (1) CN202097673U (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102601686A (en) * 2012-04-10 2012-07-25 大连理工大学 Rotary abrasive flow polishing device for integral impeller type parts
CN103846798A (en) * 2014-03-28 2014-06-11 长春理工大学 Variable caliber pipe abrasive flow ultra-precise polishing measurement and control system
CN103921217A (en) * 2014-05-04 2014-07-16 长春理工大学 On-line temperature correction compensation method for abrasive grain stream processing
CN104440584A (en) * 2014-11-04 2015-03-25 广东工业大学 Abrasive flow micropore polishing device and polishing process thereof
CN104551985A (en) * 2014-12-12 2015-04-29 长春理工大学 General clamp for abrasive flow polishing of complicated hole surface
CN104833387A (en) * 2015-05-07 2015-08-12 长春理工大学 Oil nozzle abrasive flow machining single factor test analysis method
CN104888918A (en) * 2015-06-16 2015-09-09 吴江澳明纺织品有限公司 Grinding device for textiles
CN105538048A (en) * 2015-12-15 2016-05-04 广东工业大学 Self-pressurized high-speed abrasive flow type hole inner surface polishing method
CN106976008A (en) * 2017-05-10 2017-07-25 国营第六六厂 A kind of big L/D ratio intersects the burr removal device and method of deep oilhole
CN107571139A (en) * 2017-09-07 2018-01-12 江苏大学 A kind of dual-workpiece alternate type abrasive Flow polishing machine
CN108115543A (en) * 2017-12-19 2018-06-05 大连理工大学 The computational methods of cross bore workpiece inner wall abrasive Flow uniform polish mold and its mold core
CN109397112A (en) * 2018-10-29 2019-03-01 大连理工大学 A kind of extruding abrasive flows machining medium list Two-way Cycle feedway and its working method
CN110216527A (en) * 2019-06-14 2019-09-10 哈工大机器人(合肥)国际创新研究院 For inner cavity, there are the polishing methods of the metal parts of bend flow channel

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102601686B (en) * 2012-04-10 2013-11-20 大连理工大学 Rotary abrasive flow polishing device for integral impeller type parts
CN102601686A (en) * 2012-04-10 2012-07-25 大连理工大学 Rotary abrasive flow polishing device for integral impeller type parts
CN103846798B (en) * 2014-03-28 2016-06-08 长春理工大学 The Ultraprecise polished TT&C system of a kind of calibre-changeable pipe abrasive Flow
CN103846798A (en) * 2014-03-28 2014-06-11 长春理工大学 Variable caliber pipe abrasive flow ultra-precise polishing measurement and control system
CN103921217A (en) * 2014-05-04 2014-07-16 长春理工大学 On-line temperature correction compensation method for abrasive grain stream processing
CN104440584A (en) * 2014-11-04 2015-03-25 广东工业大学 Abrasive flow micropore polishing device and polishing process thereof
CN104551985A (en) * 2014-12-12 2015-04-29 长春理工大学 General clamp for abrasive flow polishing of complicated hole surface
CN104833387A (en) * 2015-05-07 2015-08-12 长春理工大学 Oil nozzle abrasive flow machining single factor test analysis method
CN104888918A (en) * 2015-06-16 2015-09-09 吴江澳明纺织品有限公司 Grinding device for textiles
CN105538048A (en) * 2015-12-15 2016-05-04 广东工业大学 Self-pressurized high-speed abrasive flow type hole inner surface polishing method
CN106976008A (en) * 2017-05-10 2017-07-25 国营第六六厂 A kind of big L/D ratio intersects the burr removal device and method of deep oilhole
CN107571139A (en) * 2017-09-07 2018-01-12 江苏大学 A kind of dual-workpiece alternate type abrasive Flow polishing machine
CN107571139B (en) * 2017-09-07 2020-02-21 江苏大学 Dual-workpiece alternating abrasive flow polishing machine
CN108115543A (en) * 2017-12-19 2018-06-05 大连理工大学 The computational methods of cross bore workpiece inner wall abrasive Flow uniform polish mold and its mold core
CN108115543B (en) * 2017-12-19 2019-05-21 大连理工大学 The calculation method of cross bore workpiece inner wall abrasive Flow uniform polish mold and its mold core
CN109397112A (en) * 2018-10-29 2019-03-01 大连理工大学 A kind of extruding abrasive flows machining medium list Two-way Cycle feedway and its working method
CN110216527A (en) * 2019-06-14 2019-09-10 哈工大机器人(合肥)国际创新研究院 For inner cavity, there are the polishing methods of the metal parts of bend flow channel

Similar Documents

Publication Publication Date Title
CN202097673U (en) Ultra-precise micro-hole abrasive flow polishing device
CN104526531B (en) Efficient constant-pressure-difference intermittent rotation extrusion abrasive flow polishing method
CN104260008A (en) Unpowered rotary holding device
CN105822614A (en) Electro-hydrostatic actuator
CN102755858B (en) The electrically driven (operated) diamond press of a kind of band
CN201747684U (en) Rapidly hydraulic driving system
CN204486935U (en) Hydraulic expansion frock
Li et al. The development of nozzle micro-hole abrasive flow machining equipment
CN107571139B (en) Dual-workpiece alternating abrasive flow polishing machine
CN105181475B (en) A kind of impulse test system of servo electric jar supercharging
CN203621515U (en) Full-automatic hydraulic tail base
CN109397112B (en) Extrusion abrasive flow processing medium single-double circulation supply device and working method thereof
CN203918488U (en) A kind of hydraulically operated fixture for the processing of thin wall cylindrical part
CN202491787U (en) Gas and liquid combination device of automatic aerator for wheels of saloon car
CN203956249U (en) Double tapered internal expanding gear-hobbing clamp
CN106238533A (en) Stainless steel tube Hydraulic Expansion mode tool and equipment
US10969058B2 (en) Continuous supply precision minimum quantity lubrication pump supporting different lubrication conditions
CN203162134U (en) Hydraulic oil cylinder piston rod
CN203542096U (en) Turning lathe clamp for machining hinge shaft inner hole
CN203509618U (en) Clamp with rotation function
CN2882902Y (en) Two-way driving gear realized by two acting cylinders through closed abrasive materials
CN104653544A (en) Irregular section type magnetic rodless hydraulic cylinder/ pneumatic cylinder
CN207736138U (en) A kind of vertical Reciprocatory abrasive Flow polishing machine mechanical structure
CN2703608Y (en) Co-axial clamp of piston type cylinder
CN203549198U (en) Large-diameter telescopic joint pressure testing device for valve pipe lower reaches

Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120104

Termination date: 20130515

C17 Cessation of patent right