CN109595209A - A kind of local derviation jet servo valve Three Degree Of Freedom debugging apparatus - Google Patents

A kind of local derviation jet servo valve Three Degree Of Freedom debugging apparatus Download PDF

Info

Publication number
CN109595209A
CN109595209A CN201811439328.8A CN201811439328A CN109595209A CN 109595209 A CN109595209 A CN 109595209A CN 201811439328 A CN201811439328 A CN 201811439328A CN 109595209 A CN109595209 A CN 109595209A
Authority
CN
China
Prior art keywords
servo valve
local derviation
longitudinal
platform
degree
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.)
Granted
Application number
CN201811439328.8A
Other languages
Chinese (zh)
Other versions
CN109595209B (en
Inventor
张俊杰
周宣
孟健
高宏
乔树林
张宇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Experimental Factory Co Ltd
Original Assignee
Beijing Experimental Factory Co Ltd
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 Beijing Experimental Factory Co Ltd filed Critical Beijing Experimental Factory Co Ltd
Priority to CN201811439328.8A priority Critical patent/CN109595209B/en
Publication of CN109595209A publication Critical patent/CN109595209A/en
Application granted granted Critical
Publication of CN109595209B publication Critical patent/CN109595209B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B19/00Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for

Abstract

The present invention proposes a kind of local derviation jet servo valve Three Degree Of Freedom debugging apparatus, including pedestal, horizontal platform, longitudinal platform, rotary components, clamping component, measurement component;Flat recess in the servo valve is a part of the pedestal of local derviation jet servo valve, the pedestal is fixed on the pedestal of local derviation jet servo valve, deflecting plates in the servo valve is a part of armature component, horizontal platform is connect by cross slide way with pedestal, and longitudinal platform is connect by longitudinal rail with horizontal platform;Rotary components are arranged on longitudinal platform, and armature component sequentially passes through rotary components, longitudinal platform, horizontal platform and four with common center from top to bottom;The position for adjusting armature component is the position for adjusting deflecting plates, realizes the adjusting of deflecting plates position in flat recess.Its is simple and compact for structure, and test is accurate practical.

Description

A kind of local derviation jet servo valve Three Degree Of Freedom debugging apparatus
Technical field
The present invention relates to a kind of local derviation jet servo valve Three Degree Of Freedom debugging apparatus, belong to valve field.
Background technique
Local derviation jet servo valve is not easy stifled match, and contamination resistance is strong, is widely used in aerospace field.Wherein, it deflects Plate and jet stream piece are the cores of local derviation jet servo valve, and working principle is referring to Fig. 1: when work, jet chamber 1 is passed through high pressure oil Liquid, oil liquid are injected into left receptive cavity 2 and right receptive cavity 3 through the V slot in deflecting plates 4 in flat recess 5, and left receptive cavity 2 and the right side connect Power stage movement is pushed by the pressure of chamber 3.The cooperation of deflecting plates 4 and flat recess 5 directly determines that properties of product export.It is theoretical On, deflecting plates 4 should be in the middle of 5 transverse direction of flat recess, longitudinal direction and angle, and still, deflecting plates 4 is in transverse direction, longitudinal direction, angle On position be unable to measure, lateral, longitudinal direction and rotation angle change influence to properties of product of the deflecting plates 4 in flat recess 5 Also not it is found that this, which causes part servo valve that need to adjust deflection Board position repeatedly, could meet performance, the size quantity of adjustment can not Measurement.
Summary of the invention
(1) technical problems to be solved
For above-mentioned deficiency in the prior art, the present invention proposes a kind of local derviation jet servo valve Three Degree Of Freedom debugging dress It sets, position of the deflecting plates in flat recess can be accurately measured, the position includes lateral position, lengthwise position and rotation Angle.The debugging apparatus is simple and compact for structure, and test is accurate practical.
(2) technical solution
A kind of local derviation jet servo valve Three Degree Of Freedom debugging apparatus, including pedestal, horizontal platform, longitudinal platform, rotation group Part, clamping component, measurement component;Flat recess in the servo valve is a part of the pedestal of local derviation jet servo valve, described Pedestal is fixed on the pedestal of local derviation jet servo valve, and the deflecting plates in the servo valve is a part of armature component, laterally Platform is connect by cross slide way with pedestal, and longitudinal platform is connect by longitudinal rail with horizontal platform;Rotary components setting exists On longitudinal platform, armature component sequentially pass through from top to bottom rotary components, longitudinal platform, horizontal platform and four have it is common Center;The position for adjusting armature component is the position for adjusting deflecting plates, realizes the adjusting of deflecting plates position in flat recess.
Wherein, the rotary components include left semicircle, right semi-circle, fixed block, and left semicircle and right semi-circle pass through two fixations Block remains a full circle;Circular groove is respectively provided on left semicircle, right semi-circle, the position setting opposite with the circular groove of longitudinal platform is anti- Topple screw, and the circular groove and overturn-preventing screw adaptation are to realize rotation and anti-dumping of the rotary components relative to longitudinal platform It covers.
Wherein, the left semicircle, be oppositely arranged pin hole on right semi-circle, the both ends of the fixed block are also provided with pin hole, pin It follows closely the pin hole being each passed through on the pin hole and left semicircle or right semi-circle of fixed block and left semicircle and right semi-circle is remained into a full circle.
Wherein, the clamping component is set to another side of the rotary components relative to longitudinal platform, the clamping component packet The two of orthogonal setting are included to clamping device, the clamping device includes that screw, screw penetrate block and sliding block, and screw penetrates Block is fixed on rotary components, and tip of screw is fixedly connected with sliding block, and screw spiral penetrates screw and penetrates block to push sliding block to armature Component is clamped, and moves armature component together with rotary components.
Wherein, the clamping device is arranged on left semicircle or right semi-circle.
Wherein, left semicircle, be respectively provided with circular groove on right semi-circle, be arranged on longitudinal platform several for the installation of overturn-preventing screw Screw hole.
Wherein, the measurement component includes amesdial and wheel measuring table, and the side of pedestal is arranged in the bracket of amesdial, Amesdial is fixed on the bracket of amesdial, and the measurement end of amesdial is pushed against the side of longitudinal platform.
Wherein, the side of longitudinal platform is arranged in the bracket of the wheel measuring table, and wheel measuring table is fixed on rotation and surveys On the bracket of scale, the contact of wheel measuring table be pushed against on the stretching block of left semicircle one.
Wherein, the wheel measuring table measures size variable quantity, utilizes radius size and triangle relation, θ=arcsin △ X/C, calculation amount;Wherein, θ is angle variable quantity, and △ x is size changing amount, and C is radius of turn.
A kind of application method of local derviation jet servo valve Three Degree Of Freedom debugging apparatus, comprising the following steps:
S1, the pedestal that the pedestal of local derviation jet servo valve Three Degree Of Freedom debugging apparatus is installed on to local derviation jet servo valve On;
Armature component and rotary components are fixed as one by S2, clamping component, and rotating iron component records angle measuring gauge Maximum value and minimum value, value is angle zero point among it;
S3, longitudinal push-and-pull armature component, record the greatest measure and minimum value of longitudinal movement, value is longitudinal among it Zero point;
S4, armature component is moved left and right, the hydraulic pressure of left receptive cavity and right receptive cavity is equal in local derviation jet servo valve When, this position is lateral zero point;
S5, after lateral zero point, longitudinal zero point, angle zero point determine, adjust separately the variation of transverse direction, longitudinal direction, angle, survey Measure the performance of local derviation jet servo valve.
(3) beneficial effect
The present invention proposes a kind of local derviation jet servo valve Three Degree Of Freedom debugging apparatus, can accurately measure deflecting plates and exist Position in flat recess, the position include lateral position, lengthwise position and rotation angle.The debugging apparatus structure is simply tight It gathers, test is accurate practical.
Detailed description of the invention
Fig. 1 local derviation jet servo valve schematic diagram of internal structure.
A kind of cross sectional view of local derviation jet servo valve Three Degree Of Freedom debugging apparatus Fig. 2 of the invention.
A kind of sectional side elevation of local derviation jet servo valve Three Degree Of Freedom debugging apparatus Fig. 3 of the invention.
A kind of top view of local derviation jet servo valve Three Degree Of Freedom debugging apparatus Fig. 4 of the invention.
A kind of angle measurement schematic diagram of local derviation jet servo valve Three Degree Of Freedom debugging apparatus Fig. 5 of the invention.
A kind of rotary components front and back sides schematic diagram of local derviation jet servo valve Three Degree Of Freedom debugging apparatus Fig. 6 of the invention.
In figure, 1- jet chamber, the left receptive cavity of 2-, the right receptive cavity of 3-, 4- deflecting plates, 5- flat recess, 6- pedestal, 7- is lateral to be put down Platform, the longitudinal direction 8- platform, 9- cross slide way, 10- longitudinal rail, 11- amesdial, 12- armature component, 13- left semicircle, 14- right half Circle, 15- sliding block, 16- fixed block, 17- screw, 18- wheel measuring table, 19- circular groove.
Specific embodiment
Referring to figure 2-3, the present invention proposes a kind of local derviation jet servo valve Three Degree Of Freedom debugging apparatus comprising pedestal 6, cross To platform 7, longitudinal platform 8, rotary components, clamping component, measurement component;Flat recess 5 in the servo valve is local derviation jet stream A part of the pedestal (not shown) of servo valve, the pedestal 6 are fixed on the pedestal of local derviation jet servo valve, the servo valve In deflecting plates 4 be armature component 12 a part, horizontal platform 7 connect by cross slide way 9 with pedestal 6, and longitudinal platform 8 leads to Longitudinal rail 10 is crossed to connect with horizontal platform 7;Rotary components are arranged on longitudinal platform 8, and armature component 12 is from top to bottom successively There is common center across rotary components, longitudinal platform 8, horizontal platform 7 and four;It adjusts the position for adjusting armature component 12 The adjusting of the position in flat recess 5 of deflecting plates 4 is realized in the position of whole deflecting plates 4.
Referring to fig. 4,6, the rotary components include left semicircle 13, right semi-circle 14, fixed block 16, left semicircle 13 and right semi-circle 14 remain a full circle by two fixed blocks 16;Be respectively provided with circular groove 19 on left semicircle 13, right semi-circle 14, longitudinal platform 8 with Overturn-preventing screw is arranged in the opposite position of the circular groove 19, and the circular groove 19 and overturn-preventing screw adaptation are to realize rotation group Rotation and overturn-preventing of the part relative to longitudinal platform 8.
Pin hole is oppositely arranged on the left semicircle 13, right semi-circle 14, the both ends of the fixed block 16 are also provided with pin hole, pin The pin hole being each passed through on the pin hole and left semicircle 13 or right semi-circle 14 of fixed block 16 is followed closely to keep left semicircle 13 and right semi-circle 14 For a full circle.
Referring to fig. 4,6, the clamping component is set to another side of the rotary components relative to longitudinal platform 8, the clamping Component includes orthogonal setting two to clamping device, and the clamping device includes that screw 17, screw penetrate block and sliding block 15, screw penetrates block and is fixed on rotary components, and 17 end of screw is fixedly connected with sliding block 15, and 17 spiral of screw penetrates screw and penetrates block To push sliding block 15 to be clamped armature component 12, move armature component 12 together with rotary components.
The clamping device is arranged on left semicircle 13 or right semi-circle 14.
It is respectively provided with circular groove 19 on left semicircle 13, right semi-circle 14, is arranged on longitudinal platform 8 several for the installation of overturn-preventing screw Screw hole.
Referring to fig. 2, the measurement component includes amesdial 11 and wheel measuring table 18, and the bracket of amesdial 11 is arranged in base The side of seat 6, amesdial 11 are fixed on the bracket of amesdial 11, and the measurement end of amesdial 11 is pushed against the side of longitudinal platform 8 Face.
Referring to Fig. 5, the side of longitudinal platform 8 is arranged in the bracket of the wheel measuring table 18, and wheel measuring table 18 is fixed On the bracket of wheel measuring table 18, the contact of wheel measuring table 18 is pushed against on the stretching block integrated with left semicircle 13.
The wheel measuring table 18 measures size variable quantity, using radius size and triangle relation, θ=arcsin △ x/C, Calculation amount;Wherein, θ is angle variable quantity, and △ x is size changing amount, and C is radius of turn.
A kind of application method of local derviation jet servo valve Three Degree Of Freedom debugging apparatus of the invention comprising following steps:
S1, the pedestal that the pedestal 6 of local derviation jet servo valve Three Degree Of Freedom debugging apparatus is installed on to local derviation jet servo valve On;
Armature component 12 is fixed as one by S2, clamping component with rotary components, rotating iron component 12, records angle measurement The maximum value and minimum value of table 18, value is angle zero point among it;
S3, longitudinal push-and-pull armature component 12, record the greatest measure and minimum value of longitudinal movement, value is vertical among it To zero point;
S4, armature component 12 is moved left and right, the hydraulic pressure of left receptive cavity 2 and right receptive cavity 3 in local derviation jet servo valve When equal, this position is lateral zero point;
S5, after lateral zero point, longitudinal zero point, angle zero point determine, adjust separately the variation of transverse direction, longitudinal direction, angle, survey Measure the performance of local derviation jet servo valve.

Claims (10)

1. a kind of local derviation jet servo valve Three Degree Of Freedom debugging apparatus, which is characterized in that including pedestal, horizontal platform, Zong Xiangping Platform, rotary components, clamping component, measurement component;Flat recess in the servo valve is the one of the pedestal of local derviation jet servo valve Part, the pedestal are fixed on the pedestal of local derviation jet servo valve, and the deflecting plates in the servo valve is the one of armature component Part, horizontal platform are connect by cross slide way with pedestal, and longitudinal platform is connect by longitudinal rail with horizontal platform;Rotation group Part is arranged on longitudinal platform, and armature component sequentially passes through rotary components, longitudinal platform, horizontal platform and four tools from top to bottom There is common center;The position for adjusting armature component is the position for adjusting deflecting plates, realizes deflecting plates position in flat recess It adjusts.
2. a kind of local derviation jet servo valve Three Degree Of Freedom debugging apparatus as described in claim 1, which is characterized in that the rotation Component includes left semicircle, right semi-circle, fixed block, and left semicircle and right semi-circle remain a full circle by two fixed blocks;Left half Circular groove is respectively provided on circle, right semi-circle, overturn-preventing screw, the circular groove and institute is arranged in longitudinal platform position opposite with the circular groove Overturn-preventing screw adaptation is stated to realize rotation and overturn-preventing of the rotary components relative to longitudinal platform.
3. a kind of local derviation jet servo valve Three Degree Of Freedom debugging apparatus as claimed in claim 2, which is characterized in that described left half It is oppositely arranged pin hole on circle, right semi-circle, the both ends of the fixed block are also provided with pin hole, and pin is each passed through the pin hole of fixed block Left semicircle and right semi-circle are remained into a full circle with the pin hole on left semicircle or right semi-circle.
4. a kind of local derviation jet servo valve Three Degree Of Freedom debugging apparatus as claimed in claim 3, which is characterized in that the clamping Component is set to another side of the rotary components relative to longitudinal platform, and the clamping component includes orthogonal setting two to folder Tight device, the clamping device include that screw, screw penetrate block and sliding block, and screw penetrates block and is fixed on rotary components, screw End is fixedly connected with sliding block, and screw spiral penetrates screw and penetrates block to push sliding block to be clamped armature component, makes armature group Part moves together with rotary components.
5. a kind of local derviation jet servo valve Three Degree Of Freedom debugging apparatus as claimed in claim 4, which is characterized in that the clamping Device is arranged on left semicircle or right semi-circle.
6. a kind of local derviation jet servo valve Three Degree Of Freedom debugging apparatus as claimed in claim 5, which is characterized in that left semicircle, It is respectively provided with circular groove on right semi-circle, several screw holes for the installation of overturn-preventing screw are set on longitudinal platform.
7. a kind of local derviation jet servo valve Three Degree Of Freedom debugging apparatus as claimed in claim 6, which is characterized in that the measurement Component includes amesdial and wheel measuring table, and the side of pedestal is arranged in the bracket of amesdial, and amesdial is fixed on amesdial On bracket, the measurement end of amesdial is pushed against the side of longitudinal platform.
8. a kind of local derviation jet servo valve Three Degree Of Freedom debugging apparatus as claimed in claim 7, which is characterized in that the rotation The side of longitudinal platform is arranged in the bracket of measurement table, and wheel measuring table is fixed on the bracket of wheel measuring table, wheel measuring The contact of table be pushed against on the stretching block of left semicircle one.
9. a kind of local derviation jet servo valve Three Degree Of Freedom debugging apparatus as claimed in claim 8, which is characterized in that the rotation Measurement table measures size variable quantity, utilizes radius size and triangle relation, θ=arcsin △ x/C, calculation amount;Its In, θ is angle variable quantity, and △ x is size changing amount, and C is radius of turn.
10. a kind of application method of local derviation jet servo valve Three Degree Of Freedom debugging apparatus as claimed in claim 9, feature exist In, comprising the following steps:
S1, the pedestal of local derviation jet servo valve Three Degree Of Freedom debugging apparatus is installed on the pedestal of local derviation jet servo valve;
Armature component and rotary components are fixed as one by S2, clamping component, and rotating iron component records the maximum of angle measuring gauge Value and minimum value, value is angle zero point among it;
S3, longitudinal push-and-pull armature component, record the greatest measure and minimum value of longitudinal movement, value is longitudinal zero among it Point;
S4, armature component is moved left and right, when the hydraulic pressure of left receptive cavity and right receptive cavity is equal in local derviation jet servo valve, this Position is lateral zero point;
S5, after lateral zero point, longitudinal zero point, angle zero point determine, adjust separately the variation of transverse direction, longitudinal direction, angle, measurement is inclined Lead the performance of jet servo valve.
CN201811439328.8A 2018-11-29 2018-11-29 Three-degree-of-freedom debugging device for partial-pilot jet servo valve Active CN109595209B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811439328.8A CN109595209B (en) 2018-11-29 2018-11-29 Three-degree-of-freedom debugging device for partial-pilot jet servo valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811439328.8A CN109595209B (en) 2018-11-29 2018-11-29 Three-degree-of-freedom debugging device for partial-pilot jet servo valve

Publications (2)

Publication Number Publication Date
CN109595209A true CN109595209A (en) 2019-04-09
CN109595209B CN109595209B (en) 2020-08-07

Family

ID=65960472

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811439328.8A Active CN109595209B (en) 2018-11-29 2018-11-29 Three-degree-of-freedom debugging device for partial-pilot jet servo valve

Country Status (1)

Country Link
CN (1) CN109595209B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111894922A (en) * 2019-12-20 2020-11-06 中国航发长春控制科技有限公司 Deflection plate structure of electro-hydraulic servo valve
CN114321059A (en) * 2021-11-27 2022-04-12 国营芜湖机械厂 Mechanical zero adjustment method and device for servo valve

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101311555A (en) * 2007-05-22 2008-11-26 上海诺玛液压系统有限公司 Tools for electrohydraulic servo valve for debugging prestage differential pressure and nozzle flapper gap
CN104567686A (en) * 2013-10-18 2015-04-29 北京精密机电控制设备研究所 Deflection plate displacement measuring device
CN205689512U (en) * 2015-11-06 2016-11-16 中国航空工业第六一八研究所 A kind of electricity reaction type deflecting plates jet electrohydraulic servo valve
CN106644213A (en) * 2015-10-30 2017-05-10 北京精密机电控制设备研究所 Nozzle baffle plate servo valve prestage hydraulic power test device and method
CN106931000A (en) * 2017-02-23 2017-07-07 北京交通大学 The prestage model equipment of local derviation jet servo valve
CN107965485A (en) * 2016-10-20 2018-04-27 北京精密机电控制设备研究所 A kind of accurate positioning device for the debugging of local derviation jet servo valve prestage

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101311555A (en) * 2007-05-22 2008-11-26 上海诺玛液压系统有限公司 Tools for electrohydraulic servo valve for debugging prestage differential pressure and nozzle flapper gap
CN104567686A (en) * 2013-10-18 2015-04-29 北京精密机电控制设备研究所 Deflection plate displacement measuring device
CN106644213A (en) * 2015-10-30 2017-05-10 北京精密机电控制设备研究所 Nozzle baffle plate servo valve prestage hydraulic power test device and method
CN205689512U (en) * 2015-11-06 2016-11-16 中国航空工业第六一八研究所 A kind of electricity reaction type deflecting plates jet electrohydraulic servo valve
CN107965485A (en) * 2016-10-20 2018-04-27 北京精密机电控制设备研究所 A kind of accurate positioning device for the debugging of local derviation jet servo valve prestage
CN106931000A (en) * 2017-02-23 2017-07-07 北京交通大学 The prestage model equipment of local derviation jet servo valve

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111894922A (en) * 2019-12-20 2020-11-06 中国航发长春控制科技有限公司 Deflection plate structure of electro-hydraulic servo valve
CN114321059A (en) * 2021-11-27 2022-04-12 国营芜湖机械厂 Mechanical zero adjustment method and device for servo valve
CN114321059B (en) * 2021-11-27 2023-04-14 国营芜湖机械厂 Mechanical zero adjustment method and device for servo valve

Also Published As

Publication number Publication date
CN109595209B (en) 2020-08-07

Similar Documents

Publication Publication Date Title
CN109595209A (en) A kind of local derviation jet servo valve Three Degree Of Freedom debugging apparatus
CN105066848B (en) Dove-tail form blade tenon pressure face angle measurement unit and method
CN103234488B (en) A kind of thickness and parallelism intelligent detecting device
CN109490745A (en) The Universal Die group test device of high testing efficiency
CN105973111B (en) A kind of quick positioning measuring device of egg type pneumatic shell and measuring method
CN103308022A (en) Angle-adjustable measuring jig
CN109357600A (en) A kind of taper hole taper detector
CN109520398A (en) A kind of detection device
CN108088763B (en) Multi-head plane reciprocating type friction and wear testing machine
CN106767332A (en) A kind of taper cubing
CN103486947A (en) Device for detecting dovetail guide rail parallelism
CN106225738B (en) A kind of linear guide accuracy detecting device and method
CN203163702U (en) Intelligent thickness and parallelism detecting device
CN109341478A (en) A kind of turbo blade dimension measuring device and measurement method
CN215890459U (en) Compressor driving disk and static disk gap measuring device
CN205403754U (en) A measure frock for roundness measuring equipment
CN102721347A (en) Tool and method for detecting length of welding foot of PCBA (printed circuit board assembly)
CN110685972B (en) High-precision oil-saving performance testing system for hydraulic oil cylinder
CN203489866U (en) Measuring device for measuring relative angles between center of camshaft key slot and centers of camshaft pinholes
CN208588337U (en) A kind of measuring device of disk spring internal-and external diameter variation
CN206019503U (en) A kind of hole position gauge
CN111623695A (en) Automobile synchronizer gear hub slider slot symmetry degree detection device
CN206740030U (en) A kind of valve stem end surface jitter detection apparatus
CN206803874U (en) Size detection cubing between a kind of hinge of control arm two
CN110285737A (en) A kind of diesel engine single body high-pressure oil pump ram travel measuring device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant