CN203519256U - Rotary body centroid measurement bracket - Google Patents

Rotary body centroid measurement bracket Download PDF

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Publication number
CN203519256U
CN203519256U CN201320588050.7U CN201320588050U CN203519256U CN 203519256 U CN203519256 U CN 203519256U CN 201320588050 U CN201320588050 U CN 201320588050U CN 203519256 U CN203519256 U CN 203519256U
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CN
China
Prior art keywords
rest
edge
knife
support
rectangular frame
Prior art date
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CN201320588050.7U
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Chinese (zh)
Inventor
肖利杰
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北京航天新风机械设备有限责任公司
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Priority to CN201320588050.7U priority Critical patent/CN203519256U/en
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Publication of CN203519256U publication Critical patent/CN203519256U/en

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Abstract

The utility model provides a rotary body centroid measurement bracket which adopts an integrated blade bracket structure to achieve measurement of a centroid position of a rotary body with a variety of lengths, directions (X, Y and Z directions) and diameters. The rotary body centroid measurement bracket includes a bracket structure, a rest and a positioning rod. The bracket structure includes a blade bracket and a rest placement slot. When a centroid in the X direction is measured, the rest is placed in the rest placement slot, two blade stand bars for measuring the bracket are placed at the center of the two electronic scales respectively, the rotary body is placed with a product axis perpendicular to a short side of a rectangular frame, and the positioning rod is placed on a plane at an arc surface side of of the rest at the short side of the rectangular frame, so that a scribed line in the center of each blade stand bar is aligned with a scribed line on the surface of a positioning slide block to measure the required distance. When the centroid in the Y and Z directions is measured, the rest is placed in the rest placement slot and the rotary body is placed with the axis parallel to a short side of the bracket. The use of an inverted triangle blade stand bar supporting manner increases the stability of the bracket and meanwhile avoids direct contact of a blade with a product under test.

Description

A kind of solid of revolution barycenter is measured support

Technical field

The utility model relates to a kind of measurement support that turns round object mass center, particularly a kind of measurement support of symmetrical structure column type revolution object (being referred to as below solid of revolution) barycenter.

Background technology

At space industry, the shared ratio of the column type class solid of revolution product that is assembled by standard component, zero parts, equipment and cable etc. is higher, in order to verify the design objective of product, need to carry out barycenter measurement.Barycenter measuring method is divided into traditional measurement and high precision quality center of mass test board is measured.Because high precision quality center of mass testing apparatus is high to environmental requirement, installation and complicated operation, poor stability, the feature such as involve great expense, cost performance is low; Classic method adopts simple edge of a knife mechanical support structure to measure, and practicality is high.Edge of a knife supporting construction is divided into " X-direction edge of a knife supporting construction " and " Y/Z is to edge of a knife supporting construction " two kinds of supports of measuring Y, Z-direction barycenter of measuring X-direction barycenter.Its measuring principle is as follows:

First use X-direction edge of a knife support to carry out the measurement of X-direction barycenter, scheme of installation is shown in accompanying drawing 1.Be specially, the strong point 1 and the strong point 2 edge of a knife supports are placed on respectively on two electronic scaless, solid of revolution is vertically positioned over edge of a knife top, measure the strong point 1 and the strong point 2 to vertical range X1 and the X2 of solid of revolution front portion, and reading m1 and the m2 of the strong point 1 and the strong point 2 place's electronic scaless, by principle of moment balance, can try to achieve solid of revolution X-direction centroid position Xc=(m1X1+m2X2)/(m1+m2).

Then use Y/Z to carry out Y/Z to the measurement of barycenter to edge of a knife support, scheme of installation is shown in accompanying drawing 2.Be specially, the strong point 1 and the strong point 2 edge of a knife supports are placed on respectively on two electronic scaless, YZ is placed on the edge of a knife of the strong point 1 and the strong point 2 to edge of a knife supporting structure, solid of revolution is vertically placed on the arc-shaped bracket of edge of a knife supporting structure, regulates and keeps support balance.Measure the strong point 1 and the strong point 2 to vertical range Z1 from Y/Z to edge of a knife supporting structure arc-shaped bracket center and Z2, and reading m1 and the m2 of the strong point 1 and the strong point 2 place's electronic scaless, by principle of moment balance, can try to achieve solid of revolution Z-direction centroid position Zc=(m2Z2-m1Z1)/(m1+m2).By solid of revolution, along X-direction 90-degree rotation, the measuring process that repeats Z-direction barycenter can obtain Y-direction centroid position Yc=(m2Y2-m1Y1)/(m1+m2).

The feature of this support is: simple in structure, implementation Process is convenient, and installation environment requires low, and dismounting is quick and convenient, and cost is low.But have the following disadvantages: 1. measuring accuracy is on the low side, X-direction barycenter measuring error is conventionally at 3~8mm, Y/Z to barycenter measuring error conventionally at 2~5mm.2. morpheme error is larger when mounted for solid of revolution; 3. artificial more difficult other positions of support of measuring are exactly to the distance of edge of a knife position; 4. the installation of edge of a knife support needs leveling, and process is more loaded down with trivial details, and rotary structure is unstable, easily has the risk of falling; 5. in order to improve measuring accuracy as far as possible, the edge of a knife of supporting construction is often sharper, but easily solid of revolution is caused to cutting damage; 6. X-direction barycenter needs to change Y/Z to the support of barycenter measurement knife edge structure after measuring, and has increased and has measured the installation switching time of support and the complicacy of operation; 7. in order to improve measuring accuracy, require supporting construction to have higher installation accuracy, need the repeated multiple times tune that carry out support, measure repeatedly the numerical result equalization of making even, correspondingly improved installation difficulty, reduced work efficiency.

Utility model content

The utility model provides a kind of measurement support of simple and easy, Quick Measurement revolution object mass center, adopts integrated edge of a knife supporting structure, realizes the measurement of the solid of revolution centroid position of different lengths, multiple direction (X, Y, Z-direction), multiple diameter; Concrete support scheme is as follows:

Solid of revolution barycenter is measured a support, comprises supporting structure, rest and backstay.The integrated machine-shaping of supporting structure, comprises edge of a knife support and rest standing groove.Edge of a knife support comprises rectangular frame and edge of a knife leg, edge of a knife leg is symmetrical in the lower end, both sides, long limit of rectangular frame, length equates with rectangular frame width, leg xsect is equilateral del, prevent the cutting damage bringing due to the direct contact product of the edge of a knife, edge of a knife leg and its horizontalization face are that line supports; There is groove the position of edge of a knife leg xsect del center line, and this groove is edge of a knife leg Support Level position; Rest standing groove is rectangular channel, is symmetrically distributed in the upper end surrounding of rectangular frame, for installing and location rest; Four rest standing groove length and width are high equal, distance between two rest standing groove centers of rectangular frame minor face equals two distances between edge of a knife leg center, and the rest that is placed on the long limit of rectangular frame is free to switch with the rest that is placed on rectangular frame minor face.Two horizontal two vertical rests design, and have reached the object of measuring X, Y, tri-direction barycenter of Z.

Rest is the rectangular structure that upside has arc surface, the length and width height of rest is measure-alike with the rest mounting groove of supporting structure, so that rest and rest mounting groove match, the arc surface of rest mates with solid of revolution to be measured, to reach the object of measuring multiple diameter solid of revolution product.Rest is respectively used to support to measure solid of revolution X-direction centroid position and Y/Z to centroid position, and rest adopts the design of different-diameter circular arc placed side, has realized the function that a kind of supporting structure is measured multiple diameter solid of revolution centroid position; The rest that is placed on the long limit of rectangular frame is identical with the rest overall dimensions that are placed on rectangular frame minor face, can exchange installation.That is to say, for same solid of revolution, after the measurement of X-direction barycenter completes, only rest need be moved to minor face rest standing groove and just can carry out Y/Z to the measurement of barycenter from long limit rest standing groove.

Backstay is comprised of base slide block and center-pole, and center-pole is fixedly connected with base slide block, and the right side of center-pole is on the extended line of a side center line of base slide block.

While measuring directions X barycenter, rest is placed in rest standing groove, two edge of a knife legs measuring support are placed on respectively to the center of two electronic scaless, solid of revolution product axis is placed perpendicular to rectangular frame minor face, and guarantee that centroid position is between edge of a knife leg Support Level, to prevent measuring toppling of support and product because centroid motion causes.Backstay is placed in the plane of rectangular frame minor face rest arc surface one side, utilize the upper surface of rest and the both direction that positioning base slide block is carried out in short side, along rotator shaft to adjusting backstay position, make edge of a knife leg center groove and positioning sliding block surface groove align measure solid of revolution one end and arrive the distance between edge of a knife leg Support Level.

While measuring Y, Z-direction barycenter, rest is placed in rest standing groove, rotator shaft line parallel is placed in support minor face.

Structure before comparing, this supporting structure is simpler, more convenient operation, purposes is wider, and precision is higher.A support only need to be changed the measurement that the supportive structure adapting just can complete X, Y, tri-direction barycenter of Z; The mode of multiple directions integral measuring has been saved the time that support changes the outfit and debugs when different directions is measured; Rest adopts the design of different-diameter circular arc placed side, can carry out the measurement of the solid of revolution barycenter of multiple diameter, different lengths; In measuring process, the significant dimensions that solid of revolution supporting and location, the support edge of a knife affect measuring accuracy to the edge of a knife, the support edge of a knife to solid of revolution axis etc. is guaranteed by machining completely, without carrying out hand dipping, and has reduced the error stack bringing thus; The mode that del edge of a knife leg supports, has increased the stability of support, avoids the edge of a knife directly to contact with test product simultaneously; .

Accompanying drawing explanation

Accompanying drawing 1 is traditional barycenter mensuration X-direction barycenter instrumentation plan;

Accompanying drawing 2 is that traditional barycenter mensuration Y/Z is to barycenter instrumentation plan;

Accompanying drawing 3 is measured support schematic diagram for barycenter and is seen;

Accompanying drawing 4 is measured support for barycenter and is measured X-direction barycenter scheme of installation;

Accompanying drawing 5 is measured support for barycenter and is measured Y/Z to barycenter scheme of installation;

1---solid of revolution, 2---X-direction centroid position, 3---edge of a knife leg, 4---Y/Z is to supporting construction, 5---the strong point 1,6---strong point 2,7---backstays, 8---be placed on the rest on rectangular frame length limit, 9---being placed on the rest of rectangular frame minor face, 10---rectangular frame.

Embodiment

Solid of revolution barycenter is measured a support, comprises supporting structure, rest and backstay.

First measure X-direction centroid position.Put two electronic scaless, make its distance be substantially equal to the spacing of supporting structure edge of a knife leg, with level meter, check the levelness that electronic scales is installed, leveling zero clearing; Determine solid of revolution diameter, select 2 of the rests corresponding with its diameter, be placed in the rectangular frame minor face rest standing groove of supporting structure; The edge of a knife leg of measuring support is placed in respectively on two electronic scaless, can on electronic scales face, places in advance a block plate to avoid scale surface cut, edge of a knife leg remains on Cheng Mian center as far as possible; Electronic scales zero clearing; Solid of revolution is placed on two minor face rests of rectangular frame, and guarantees that its barycenter is between two edges of a knife; Treat that solid of revolution, support, electronic scales are steady, reading m1 and the m2 of recorded electronic scale 1 and electronic scales 2; Backstay is placed on the rectangular frame minor face rest of solid of revolution side, utilize the upper surface of rest and the both direction that positioning base slide block is carried out in short side, along rotator shaft to adjusting backstay position, make aliging of edge of a knife leg center groove and positioning sliding block surface groove, now the projected position of backstay right side on solid of revolution axis overlaps with the projected position of edge of a knife leg Support Level on solid of revolution axis; With vernier caliper measurement solid of revolution front end, to the distance on backstay right side, be X1; X2=X1+L, wherein L is two edge of a knife leg spacing, X2 is that solid of revolution front end is to the distance between another edge of a knife leg Support Level; Utilize principle of moment balance can try to achieve the centroid position of X-direction.By one-shot measurement, obtain X1 and X2, this has just been avoided the error stack of repeatedly measuring.

Then measure Y, Z-direction centroid position.Select in addition 2 of the rests corresponding with solid of revolution diameter (also can reuse 2 rests measuring X-direction barycenter), be placed in the long limit rest standing groove of supporting structure interior and implement completely; After electronic scales zero clearing, solid of revolution is placed on two long limit rests of support, and guarantees that its barycenter is between two edges of a knife; Treat that solid of revolution, support, electronic scales are steady, reading m1 and the m2 of recorded electronic scale 1 and electronic scales 2; Wherein, Y1/Z1=Y2/Z2=L/2; Utilize principle of moment balance can try to achieve Y/Z to centroid position.By the positioning supports of rest, avoided directly Y1/Z1, Y2/Z2 being carried out to hand dipping, greatly improved measuring accuracy.

Claims (4)

1. solid of revolution barycenter is measured a support, it is characterized in that, comprises supporting structure, rest and backstay; The integrated machine-shaping of supporting structure, comprises edge of a knife support and rest standing groove; Edge of a knife support comprises rectangular frame and edge of a knife leg, and edge of a knife leg is symmetrical in the lower end, both sides, long limit of rectangular frame, and length equates with rectangular frame width, and leg xsect is equilateral del, and edge of a knife leg and its horizontalization face are line support; Rest standing groove is rectangular channel, is symmetrically distributed in the upper end surrounding of rectangular frame; Four rest standing groove length and width are high equal, and the distance between two rest standing groove centers of rectangular frame minor face equals two distances between edge of a knife leg center.
2. solid of revolution barycenter as claimed in claim 1 is measured support, it is characterized in that, rest is the rectangular structure that upside has arc surface, and the length and width height of rest is measure-alike with the rest mounting groove of supporting structure, and the arc surface of rest mates with solid of revolution to be measured; The rest that is placed on the long limit of rectangular frame is identical with the rest overall dimensions that are placed on rectangular frame minor face.
3. solid of revolution barycenter as claimed in claim 2 is measured support, it is characterized in that, backstay is by base slide block and require center-pole to form, and center-pole is fixedly connected with base slide block, and the right side of center-pole is on the extended line of a side center line of base slide block.
4. solid of revolution barycenter as claimed in claim 3 is measured support, it is characterized in that, there is groove the position of edge of a knife leg xsect del center line.
CN201320588050.7U 2013-09-23 2013-09-23 Rotary body centroid measurement bracket CN203519256U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104406476A (en) * 2014-10-16 2015-03-11 南京工艺装备制造有限公司 Aligning roller used for precision ball screw detection
CN104697712A (en) * 2015-04-01 2015-06-10 长春理工大学 Inspection method for mass center of revolving workpiece
CN105092155A (en) * 2015-05-13 2015-11-25 长春理工大学 Calibration method for center of mass of revolving body
WO2016049803A1 (en) * 2014-09-29 2016-04-07 深圳市大疆创新科技有限公司 Centre of mass measuring instrument and measuring method thereof
CN108801188A (en) * 2018-06-26 2018-11-13 上海航天电子通讯设备研究所 The measurement tooling and measurement method of telemetering module centroid position on bullet

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016049803A1 (en) * 2014-09-29 2016-04-07 深圳市大疆创新科技有限公司 Centre of mass measuring instrument and measuring method thereof
CN105518428A (en) * 2014-09-29 2016-04-20 深圳市大疆创新科技有限公司 Centre of mass measuring instrument and measuring method thereof
CN105518428B (en) * 2014-09-29 2017-09-29 深圳市大疆灵眸科技有限公司 Centroid measurement instrument and its measuring method
CN104406476A (en) * 2014-10-16 2015-03-11 南京工艺装备制造有限公司 Aligning roller used for precision ball screw detection
CN104697712A (en) * 2015-04-01 2015-06-10 长春理工大学 Inspection method for mass center of revolving workpiece
CN104697712B (en) * 2015-04-01 2017-12-01 长春理工大学 A kind of revolving body workpieces barycenter method of inspection
CN105092155A (en) * 2015-05-13 2015-11-25 长春理工大学 Calibration method for center of mass of revolving body
CN108801188A (en) * 2018-06-26 2018-11-13 上海航天电子通讯设备研究所 The measurement tooling and measurement method of telemetering module centroid position on bullet

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