CN103697797A - Inspection device for precision measurement for depth of blind hole in micro dimension - Google Patents

Inspection device for precision measurement for depth of blind hole in micro dimension Download PDF

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Publication number
CN103697797A
CN103697797A CN201310751782.8A CN201310751782A CN103697797A CN 103697797 A CN103697797 A CN 103697797A CN 201310751782 A CN201310751782 A CN 201310751782A CN 103697797 A CN103697797 A CN 103697797A
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China
Prior art keywords
thread bush
protective sleeve
test pin
dial gauge
locating piece
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Application number
CN201310751782.8A
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Chinese (zh)
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CN103697797B (en
Inventor
周正存
杜洁
严勇健
杨洪
顾苏怡
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Suzhou Vocational University
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Suzhou Vocational University
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Abstract

The invention discloses an inspection device for precision measurement for the depth of a blind hole in a micro dimension. The inspection device comprises a dial indicator, a locating block, a protective jacket, a detecting pin and a measuring contact, wherein a sleeve and a measuring rod are arranged below the dial indicator, a dial indicator mounting hole is formed in the center of the locating block, the side face of the locating block is provided with a threaded hole communicated with the dial indicator mounting hole, a dial indicator fastening bolt is arranged in the threaded hole, the protective jacket is fixedly arranged below the locating block, the axis of the protective jacket and the axis of the dial indicator mounting hole in the locating block are positioned on the same straight line, the inner wall of the lower end of the protective jacket is provided with internal threads, a thread sleeve is fixedly arranged in the protective jacket, the sleeve and the measuring rod below the dial indicator penetrate through the dial indicator mounting hole and extend into the protective jacket, the detecting pin is arranged in the protective jacket, and the measuring contact is fixedly arranged at the bottom end of the detecting pin. Through the above manner, the inspection device is simple in structure and low in manufacturing cost, and is suitable for depth measurement of holes with different hole diameters, and the measuring precision of the hole depth reaches 10<-3>mm.

Description

A kind of cubing of micron dimension precision measure blind hole depth
 
Technical field
The present invention relates to cubing manufacturing technology field, particularly relate to a kind of cubing of micron dimension precision measure blind hole depth.
Background technology
When blind hole depth franchise is in micron dimension, and its degree of depth is relatively during certain reference field, and this depth survey is the difficult point in current precision measurement always.
Summary of the invention
The technical matters that the present invention mainly solves is to provide a kind of cubing of micron dimension precision measure blind hole depth, and the measuring accuracy of hole depth reaches 10 -3mm, i.e. micron level; Cubing can adapt to different pore size, the measurement of the part that the degree of depth changes in certain limit; Cubing is simple in structure, low cost of manufacture, and durable.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: the cubing that a kind of micron dimension precision measure blind hole depth is provided, comprise: dial gauge, locating piece, protective sleeve, test pin, thread bush and measurement contact, dial gauge below is sleeve and sounding rod; Described locating piece central authorities have dial gauge mounting hole, and locating piece side is provided with the threaded hole communicating with dial gauge mounting hole, is provided with fastening dial gauge screw in threaded hole; Described protective sleeve is fixed on described locating piece below, and on the axle center of protective sleeve and locating piece, the axle center of dial gauge mounting hole is on same straight line, and the inwall of protective sleeve lower end is provided with internal thread, and described thread bush is fixed in protective sleeve; Sleeve and the sounding rod of described dial gauge below pass dial gauge mounting hole and stretch in protective sleeve, and dial gauge is fixed by fastening dial gauge screw and locating piece; Described test pin is located in protective sleeve, and between test pin and thread bush top, cover has spring, and test pin top contacts with the sounding rod of dial gauge, and described measurement contact is fixed on test pin bottom.
Preferably, described protective sleeve upper end is welded with joint flange, and protective sleeve is fixed on described locating piece below by joint flange, and described thread bush is fixed on the internal thread of protective sleeve.
Preferably, described test pin top is provided with fixed block, and fixed block contacts with the sounding rod of dial gauge, and described test pin is located in described protective sleeve, and test pin is through described thread bush and exceed thread bush lower end, test pin and thread bush clearance fit; Spring on described test pin is limited between the fixed block and thread bush top of test pin, and the rigidity of test pin upper spring is greater than the spring rate on dial gauge sounding rod.
Preferably, the cylindrical of described thread bush is screw thread, and thread bush endoporus lower end diameter is less than endoporus upper end diameter, the large clearance fit of endoporus epimere of described test pin and thread bush; The cylindrical of thread bush lower end is symmetrily processed with plane; On described protective sleeve, the position of corresponding thread bush is provided with holding screw.
Preferably, described locating piece adopts Cr12 alloy tool steel making, quenches and add lonneal processing after processing; Described protective sleeve adopts stainless-steel tube manufacture; Described test pin Cr12 steel making, quenches and adds lonneal processing; Described thread bush adopts stainless steel manufacture; Described measurement contact is diamantine.
Preferably, on described locating piece, the diameter of dial gauge mounting hole is 8mm; Described protective sleeve internal diameter 10mm, wall thickness 2mm, protective sleeve Length Ratio is measured the few 20mm of hole depth of part, the internal thread M12 of protective sleeve, length 30mm; Described test pin diameter 6mm, test pin is through the endoporus of thread bush and over thread bush lower end 15mm; Described thread bush Excircle machining becomes M12 screw thread, and thread bush length is 35mm, and endoporus lower end diameter is 6mm, and endoporus upper end diameter is 7mm.
The invention has the beneficial effects as follows: the present invention is simple in structure that low cost of manufacture is applicable to the measurement of the certain limit hole depth of different pore size.
Accompanying drawing explanation
Fig. 1 is the structural representation of the cubing of a kind of micron dimension precision measure of the present invention blind hole depth;
In accompanying drawing, the mark of each parts is as follows: 1, dial gauge; 2, fastening dial gauge screw; 3, locating piece; 4, protective sleeve; 5, test pin; 6, holding screw; 7, thread bush; 8, measure contact; 9, detected part.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in detail, thereby so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that, protection scope of the present invention is made to more explicit defining.
Refer to Fig. 1, the embodiment of the present invention comprises:
A cubing for micron dimension precision measure blind hole depth, comprising: dial gauge 1, locating piece 3, protective sleeve 4, test pin 5, thread bush 7 and measurement contact 8, dial gauge 1 below is sleeve and sounding rod, can easily the measuring accuracy in hole be brought up to 10 -3mm; Protective sleeve 4 can protect test pin 5 and dial gauge 1 to avoid collision deformation; Described locating piece 3 adopts Cr12 alloy tool steel making, quenches and add lonneal processing after processing, by adopting the locating piece 3 of different length, can measure the degree of depth of different detected part 9 diametric hole; Described locating piece 3 central authorities have dial gauge mounting hole, and the diameter of dial gauge mounting hole is 8mm, and locating piece 3 sides are provided with the threaded hole communicating with dial gauge mounting hole, are provided with fastening dial gauge screw 2 in threaded hole; Described protective sleeve 4 upper ends are welded with joint flange, protective sleeve 4 is fixed on described locating piece 3 belows by joint flange, and on the axle center of protective sleeve 4 and locating piece 3, the axle center of dial gauge mounting hole is on same straight line, the inwall of protective sleeve 4 lower ends is provided with internal thread, described thread bush 7 is fixed on the internal thread of protective sleeve 4, protective sleeve 4 adopts stainless-steel tube manufacture, protective sleeve 4 internal diameter 10mm, wall thickness 2mm, the few 20mm of hole depth of the detected part 9 of protective sleeve 4 Length Ratios, the internal thread M12 of protective sleeve 4, length 30mm; The sleeve of described dial gauge 1 below and sounding rod pass dial gauge mounting hole and stretch in protective sleeve 4, and dial gauge 1 is fixing with locating piece 3 by fastening dial gauge screw 2; Described test pin 5 is located in protective sleeve 4, and between test pin 5 and thread bush 7 tops, cover has spring, test pin 5 Cr12 steel making, quenching adds lonneal and processes, test pin 5 diameter 6mm, test pin 5, through the endoporus of thread bush 7 and over thread bush 7 lower end 15mm, adapts to the measurement in different depth hole by adjusting the length of test pin 5, the hole depth that testing tool is measured can change within the specific limits, and the structure of protective sleeve 4 and size constancy; Described thread bush 7 adopts stainless steel manufacture, thread bush 7 Excircle machinings become M12 screw thread, thread bush 7 length are 35mm, endoporus lower end diameter is 6mm, and endoporus upper end diameter is 7mm, and test pin 5 tops contact with the sounding rod of dial gauge 1, and there is certain contact force, described measurement contact 8 is fixed on test pin 5 bottoms, measures contact 8 and is diamantine, durable.
Described test pin 5 tops are provided with fixed block, and fixed block contacts with the sounding rod of dial gauge 1, and described test pin 5 is through described thread bush 7 and exceed thread bush 7 lower ends, test pin 5 and thread bush 7 clearance fit; Spring on described test pin 5 is limited between the fixed block and thread bush 7 tops of test pin 5, and the rigidity of test pin 5 upper springs is greater than the spring rate on dial gauge 1 sounding rod, while making the stressed a little generation displacement of sounding rod of dial gauge 1, dial gauge 1 first responds; The cylindrical of described thread bush 7 is screw thread, and thread bush 7 endoporus lower end diameter are less than endoporus upper end diameter, and the large clearance fit of endoporus epimere of described test pin 5 and thread bush 7, reduces the friction force that test pin moves up and down; The cylindrical of thread bush 7 lower ends is symmetrily processed with plane, facilitates thread bush 7 to screw in protective sleeve 4; On described protective sleeve 4, the position of corresponding thread bush 7 is provided with holding screw 6, for the position of retaining thread cover 7.
In conjunction with the structure shown in Fig. 1, the course of work of the cubing of the measured hole degree of depth is described:
One, protection being installed is set on locating piece
1. by thread bush 7 precession protective sleeves 4, and with holding screw 6, lock;
2. spring is penetrated to test pin 5 from the small end of test pin 5, and test pin 5 is inserted into the hole of thread bush 7 from the upper end hole of protective sleeve 4, make test pin 5 lower ends at least expose 10mm;
3. measurement contact 10 is connected on test pin 5.
4. protective sleeve 4 use trip bolts are fixed on locating piece 3.
Two, dial gauge be installed and demarcated and detect length
1. the sleeve of dial gauge 1 is inserted in the hole of locating piece 3, and slowly press down dial gauge 1, make 1 time contact of dial gauge to the upper end of test pin 5, and allow the large pointer of dial gauge 1 rotate about 1mm, then with the fixing dial gauge 1 of fastening dial gauge screw 2;
2. with gauge block, demarcate starting altitude, the length between the measurement contact 8 on test pin 2 is played on 3 times edges of calibrating and positioning piece, and the length of demarcation is slightly larger than the degree of depth in the hole of detected part 9, and makes dial gauge 1 pointer be transferred to zero-bit.If length is less than normal, need to readjust the screw-in depth of thread bush 7, the installation site of dial gauge is moved down.
Three, measure the degree of depth of part
Write down the height of demarcation, then by cubing, detect the degree of depth in hole, make depth datum (top, the hole) lapping-in in lower edge with the hole of detected part 9 of locating piece 3, observe the variation of dial gauge 1 pointer, its variable quantity is the difference in height of hole depth and demarcation, by calculating the depth value that can obtain hole, traverse measurement contact can be measured the degree of depth of bottom surface, hole diverse location within the specific limits.
Beneficial effect of the present invention has: by changing the test pin 5 of different length and the locating piece 3 of different length, cubing can adapt to the measurement of the degree of depth in the hole of different pore size; Protective sleeve 4 is simple in structure, and one end of spring is supported by thread bush end face, and one end is supported by the fixed block lower end on test pin, need step be set in the inner side of protective sleeve 4, makes protective sleeve 4 handling eases; The protection of the protected cover 4 of the sleeve of dial gauge 1 and sounding rod, is difficult for damaged in testing process; Protective sleeve 4 stainless-steel tube manufacture, not only corrosion-resistant, and low cost of manufacture; Cubing one-piece construction is simple, low cost of manufacture; Measuring accuracy reaches 10 -3mm, i.e. micron order; Change dial gauge into clock gauge, measuring accuracy can be improved to an order of magnitude, reach 10 -1μ m.
The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes instructions of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.

Claims (6)

1. a cubing for micron dimension precision measure blind hole depth, is characterized in that, comprising: dial gauge, locating piece, protective sleeve, test pin, thread bush and measurement contact, and dial gauge below is sleeve and sounding rod; Described locating piece central authorities have dial gauge mounting hole, and locating piece side is provided with the threaded hole communicating with dial gauge mounting hole, is provided with fastening dial gauge screw in threaded hole; Described protective sleeve is fixed on described locating piece below, and on the axle center of protective sleeve and locating piece, the axle center of dial gauge mounting hole is on same straight line, and the inwall of protective sleeve lower end is provided with internal thread, and described thread bush is fixed in protective sleeve; Sleeve and the sounding rod of described dial gauge below pass dial gauge mounting hole and stretch in protective sleeve, and dial gauge is fixed by fastening dial gauge screw and locating piece; Described test pin is located in protective sleeve, and between test pin and thread bush top, cover has spring, and test pin top contacts with the sounding rod of dial gauge, and described measurement contact is fixed on test pin bottom.
2. the cubing of a kind of micron dimension precision measure blind hole depth according to claim 1; it is characterized in that: described protective sleeve upper end is welded with joint flange; protective sleeve is fixed on described locating piece below by joint flange, and described thread bush is fixed on the internal thread of protective sleeve.
3. the cubing of a kind of micron dimension precision measure blind hole depth according to claim 1, it is characterized in that: described test pin top is provided with fixed block, fixed block contacts with the sounding rod of dial gauge, described test pin is located in described protective sleeve, test pin is through described thread bush and exceed thread bush lower end, test pin and thread bush clearance fit; Spring on described test pin is limited between the fixed block and thread bush top of test pin, and the rigidity of test pin upper spring is greater than the spring rate on dial gauge sounding rod.
4. the cubing of a kind of micron dimension precision measure blind hole depth according to claim 3, it is characterized in that: the cylindrical of described thread bush is screw thread, thread bush endoporus lower end diameter is less than endoporus upper end diameter, the large clearance fit of endoporus epimere of described test pin and thread bush; The cylindrical of thread bush lower end is symmetrily processed with plane; On described protective sleeve, the position of corresponding thread bush is provided with holding screw.
5. the cubing of a kind of micron dimension precision measure blind hole depth according to claim 1, is characterized in that: described locating piece adopts Cr12 alloy tool steel making, quenches and add lonneal processing after processing; Described protective sleeve adopts stainless-steel tube manufacture; Described test pin Cr12 steel making, quenches and adds lonneal processing; Described thread bush adopts stainless steel manufacture; Described measurement contact is diamantine.
6. the cubing of a kind of micron dimension precision measure blind hole depth according to claim 1, is characterized in that: on described locating piece, the diameter of dial gauge mounting hole is 8mm; Described protective sleeve internal diameter 10mm, wall thickness 2mm, protective sleeve Length Ratio is measured the few 20mm of hole depth of part, the internal thread M12 of protective sleeve, length 30mm; Described test pin diameter 6mm, test pin is through the endoporus of thread bush and over thread bush lower end 15mm; Described thread bush Excircle machining becomes M12 screw thread, and thread bush length is 35mm, and endoporus lower end diameter is 6mm, and endoporus upper end diameter is 7mm.
CN201310751782.8A 2013-12-31 2013-12-31 A kind of cubing of precision measurement for depth of blind hole in micro dimension Active CN103697797B (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105135990A (en) * 2015-05-22 2015-12-09 中国商用飞机有限责任公司 Special-purpose measuring tool used for measuring airplane horizontal tail part abrasion scratch depth
CN105352411A (en) * 2015-10-20 2016-02-24 芜湖恒隆汽车转向系统有限公司 Measurement method for depth measurement device for sealed groove
CN106468532A (en) * 2016-10-11 2017-03-01 浙江超威创元实业有限公司 A kind of aluminum plastic film scour hole depth measuring apparatus and its measuring method
CN107942932A (en) * 2017-11-23 2018-04-20 中国航发沈阳黎明航空发动机有限责任公司 A kind of quick change probe-type gauge head and measuring method that table is played for lathe
CN107966090A (en) * 2017-11-23 2018-04-27 中国航发沈阳黎明航空发动机有限责任公司 A kind of probe-type measurement device able to quickly change for detecting narrow slot and thin blind hole depth
CN109931852A (en) * 2019-02-28 2019-06-25 武汉船用机械有限责任公司 Blind hole depth supplemental measurement tool and blind hole depth measuring device
CN111992779A (en) * 2020-08-25 2020-11-27 杭州彩兔贸易有限公司 Aerospace aviation mould precision detection equipment that punches

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US3093909A (en) * 1960-06-09 1963-06-18 Eisele Andrew Precision bore gauge
JPH11257906A (en) * 1998-03-16 1999-09-24 Mitsutoyo Corp Inside measuring device
CN102252581A (en) * 2010-05-18 2011-11-23 王乃武 Shaft key groove depth detection tool
CN202092574U (en) * 2011-05-26 2011-12-28 浙江吉利汽车研究院有限公司 Shaft piece key groove checking fixture
CN203100654U (en) * 2012-12-26 2013-07-31 重庆歇马机械曲轴有限公司 Testing fixture for center holes
CN203744898U (en) * 2013-12-31 2014-07-30 苏州市职业大学 Micron measurement-level gauge for precisely measuring depth of blind holes

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3093909A (en) * 1960-06-09 1963-06-18 Eisele Andrew Precision bore gauge
JPH11257906A (en) * 1998-03-16 1999-09-24 Mitsutoyo Corp Inside measuring device
CN102252581A (en) * 2010-05-18 2011-11-23 王乃武 Shaft key groove depth detection tool
CN202092574U (en) * 2011-05-26 2011-12-28 浙江吉利汽车研究院有限公司 Shaft piece key groove checking fixture
CN203100654U (en) * 2012-12-26 2013-07-31 重庆歇马机械曲轴有限公司 Testing fixture for center holes
CN203744898U (en) * 2013-12-31 2014-07-30 苏州市职业大学 Micron measurement-level gauge for precisely measuring depth of blind holes

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105135990A (en) * 2015-05-22 2015-12-09 中国商用飞机有限责任公司 Special-purpose measuring tool used for measuring airplane horizontal tail part abrasion scratch depth
CN105352411A (en) * 2015-10-20 2016-02-24 芜湖恒隆汽车转向系统有限公司 Measurement method for depth measurement device for sealed groove
CN106468532A (en) * 2016-10-11 2017-03-01 浙江超威创元实业有限公司 A kind of aluminum plastic film scour hole depth measuring apparatus and its measuring method
CN106468532B (en) * 2016-10-11 2019-02-15 浙江超威创元实业有限公司 A kind of aluminum plastic film scour hole depth measuring device and its measurement method
CN107942932A (en) * 2017-11-23 2018-04-20 中国航发沈阳黎明航空发动机有限责任公司 A kind of quick change probe-type gauge head and measuring method that table is played for lathe
CN107966090A (en) * 2017-11-23 2018-04-27 中国航发沈阳黎明航空发动机有限责任公司 A kind of probe-type measurement device able to quickly change for detecting narrow slot and thin blind hole depth
CN107942932B (en) * 2017-11-23 2020-04-03 中国航发沈阳黎明航空发动机有限责任公司 Quick-change probe type measuring head for machine tool meter printing and measuring method
CN107966090B (en) * 2017-11-23 2020-05-29 中国航发沈阳黎明航空发动机有限责任公司 Quick-replaceable probe type measuring device for detecting depths of narrow groove and fine blind hole
CN109931852A (en) * 2019-02-28 2019-06-25 武汉船用机械有限责任公司 Blind hole depth supplemental measurement tool and blind hole depth measuring device
CN111992779A (en) * 2020-08-25 2020-11-27 杭州彩兔贸易有限公司 Aerospace aviation mould precision detection equipment that punches

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