CN204612660U - Axle keyway symmetry error measure gauge - Google Patents
Axle keyway symmetry error measure gauge Download PDFInfo
- Publication number
- CN204612660U CN204612660U CN201420453655.XU CN201420453655U CN204612660U CN 204612660 U CN204612660 U CN 204612660U CN 201420453655 U CN201420453655 U CN 201420453655U CN 204612660 U CN204612660 U CN 204612660U
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- CN
- China
- Prior art keywords
- clamping
- keyway
- symmetry error
- positioning block
- gauge
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- Expired - Fee Related
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Abstract
A kind of axle keyway symmetry error measure gauge.Clamping and positioning block 1, clamping and positioning block 2 contact with shaft key groove two sides respectively, rotation wheel, and clamping and positioning block moves, and produce pressure to key slot side, whole gauge is fixed on measured axis, realizes clamping and positioning function.Secondary chi moves on main scale, and secondary dipstick metering pawl contacts with measured axis keyway side cylindrical, moving grid display displacement data.Unload gauge, horizontally rotate 180 °, according to same measuring method, measure secondary chi and measured axis keyway opposite side cylindrical displacement data.Calculate two displacement datas poor, namely determine axle keyway symmetry error.
Description
Technical field
The utility model (invention) relates to the measurement mechanism of a kind of hole keyway mismachining tolerance, especially in process of factory production to the measurement of workpiece spindle keyway symmetry error.
Background technology
At present, axle keyway symmetry error measure mainly contains three kinds of methods, i.e. three-dimensional coordinates measurement method, locating piece method (or claiming false key method), keyway symmetry somascope method.In addition, some other is also had to utilize appliance special for detecting or measurer to carry out other method of symmetry error measurement.
Three-dimensional coordinates measurement method: shaft key groove is measured with three coordinate measuring machine, by the gauge head of three coordinate measuring machine, the axle cylindrical of workpiece, keyway two sides are got ready respectively, determine axis and the key slot side coordinate position of axle, and then determine the method for keyway symmetry.The method of getting ready of axle cylindrical is that the gauge head of three coordinate measuring machine circumferentially picks up N number of point (point is more, and precision is higher), the then gauge head of a three coordinate measuring machine mobile segment distance N number of point of same pickup on circumferential position in the axial direction axle is a certain.The method of getting ready of keyway be three coordinate measuring machine gauge head by up and down, move left and right, each pickup M point on each side of keyway.Three coordinate measuring machine carries out computing to all pickup points, determines axle axial location, key slot center planimetric position.2 times of key slot center plane and axle axial line distance value is the symmetry error of hole keyway.The advantage of three-dimensional coordinates measurement method measures accurately; Shortcoming to have three coordinate measuring machine, and measurement setup time is long, can not realize on-line measurement.
Locating piece method: utilizing locating piece side to simulate key slot side, determining the method for keyway symmetry by measuring locating piece position.Measuring process is, workpiece and fixture entirety are positioned on flat board, take plate level as reference field, and workpiece can rotate around axle axis; Locating piece (or gauge block) is bumped in shaft key groove, and locating piece wants an exposed hole end face part to measure; Dial gauge gauge head contact locating piece one side, and on side before and after, move left and right, rotate measured workpiece simultaneously, find out the point that dial gauge pointer does not all change, now think that locating piece one side is parallel with plate level, write down dial gauge reading a
1.Then take away dial gauge, be that axle rotates 180 ° measured workpiece with axially bored line, make locating piece another side parallel with plate level according to the method described above, write down dial gauge second time reading a
2, calculate the absolute value a=|a of twice difference of reading
1-a
2|; Measure the value of the degree of depth h of keyway and the diameter d in hole; Substitute into formula f=ah/ (d-h), calculate the symmetry error f of keyway.Locating piece method is the keyway symmetry error measurement method that GB1958 specifies.The shortcoming of locating piece method is that measurement efficiency is low, and symmetry error computing formula f=ah/ (d-h), still has people to hold differing views so far.Locating piece coordinates according to interference fit then more difficult installation with keyway, then affects measuring accuracy, can not carry out on-line measurement according to clearance fit.
Axle keyway symmetry somascope method: by measured workpiece diameter, regulate the position of diameter adjustment bar, adjustment lever meter gauge head angle, by differential head slow astern segment distance, the fixing gauge head of instrument is hung over the side of measured axis keyway, and make the lopsidedness about 25 ° that tested keyway hangs to instrument, two fixing gauge heads should near the side of keyway and bottom surface, precession microdrum, micrometer rod end surface be coupling tactile, about making lever meter compress half-turn, and make microdrum aim at an integer (avoiding interpolation), and adjust dial plate and make pointer to " zero ", turning microdrum again checks once, write down the first time reading E of micrometer head, retreat a microdrum about circle, taken off by instrument and turn over 180 ° and be suspended on the opposite side of keyway and tilt 25 °, precession microdrum makes lever meter pointer again arrive zero-bit, writes down the second time reading F of micrometer head, calculate symmetry error f=ah/ (d-h) as follows, f-symmetry error in formula, h-keyway is dark, d-shaft diameter, the absolute value of a-E, F value difference.With difference size, this instrument, by measuring the difference of keyway two sides to face of cylinder ultimate range, judges that whether axle keyway symmetry is qualified.Shortcoming is because this instrument is made up of lever meter, main body, micrometer part etc., particularly lever meter gauge head is perpendicular to keyway bottom surface, rotating microdrum makes the distance of lever meter gauge head and keyway bottom surface reduce, because more link is not hinged, the distance of the distance causing microdrum to be screwed into and the movement of lever meter gauge head is determine ratio than not, although the distance of the two is all very little, the repeatability of instrument still can be caused very large.
Summary of the invention
In order to overcome the some shortcomings part in existing axle keyway symmetry error measure process, the utility model (invention) provides a kind of Novel shaft keyway symmetry error measuring means---axle keyway symmetry error measure gauge, hereinafter referred to as this gauge, utilize this gauge can detect the symmetry error of shaft key groove easily and quickly, and can on-line measurement be realized.
The technical solution of the utility model is: this gauge is the position by measuring the corresponding bus relative measurement in keyway both sides gauge, determines the symmetry error value of keyway.Gauge entirety is made up of parts such as swiveling wheel, cover plate, screw, main scale, lock-screw, secondary chi, jackscrew, fixed grid, moving grid, secondary dipstick metering pawl, base plate, clamping and positioning block bolts.Each part and interact as follows: there is larger rectangular parallelepiped side's shell main scale one end, the inside is for installing the parts such as clamping and positioning block, bolt, rectangular parallelepiped side's shell has cover plate, under have base plate, swiveling wheel is had above cover plate, rotate swiveling wheel, bolt, voussoir (slide block), clamping and positioning block produce range of motion, clamping and positioning block is contacted with shaft key groove two sides, realizes positioning function.The main scale other end adopts the main scale structure of slide calliper rule, and stud with fixed grid above, secondary chi can move above.Moving grid is equipped with secondary chi, with the fixed grid on main scale, according to the display of appearance grid principle moving grid moving distance value, i.e. measured value.
Swiveling wheel one end face has circular hole, circular hole sidewall has a top wire hole, and bolt enters in circular hole, by jackscrew swiveling wheel, be bolted to together.The intermediary of bolt and clamping and positioning block transmission campaign is voussoir, and during rotation swiveling wheel, voussoir drives clamping and positioning block to move.When rotating clockwise swiveling wheel, two clamping and positioning block reverse directions move or move in opposite directions; When rotating counterclockwise swiveling wheel, two clamping and positioning blocks move or movement on the contrary in opposite directions.
Bolt is connected with screw pair form with voussoir, and voussoir is contained on bolt, and voussoir can move along bolt axis, and voussoir coordinates with wedge surface form with clamping and positioning block.
Relative theory.Symmetry error refers to that tested central factor (central plane, center line or axis) is to the variation with desired center (benchmark) key element (central plane, center line or axis) determining position.If the ideal form of measured key element and reference element is inconsistent, as one for straight line and another is plane, then require the ideal factor of ideal factor by reference element of element to be measured, evaluation symmetry error is directly located with ideal factor, the location minimum tolerance area domain representation obtained to contain tested actual feature, the ideal factor of element to be measured passes through benchmark, each plane and the tested actual feature of composition located minimum area at least should have a point cantact, and symmetry error is that measured key element is to 2 times of the maximum variable quantity of ideal factor.Shaft key groove is element to be measured, and central factor is key slot center plane, and reference element is the center line of axle, and tested desired center key element is by reference element, and now symmetry error is zero.Otherwise key slot center plane is not by axle axis, and have the distance of h therebetween, then symmetry error is 2h.
Mean value method.The diverse location point of workpiece is measured, gets the method for mean value as final measured value of repetitive measurement value.In the axial direction, repetitive measurement axle diverse location keyway symmetry error, can obtain the repetitive measurement value of keyway symmetry error, get its mean value as axle keyway symmetry error.Mean value method can reduce measuring error, keyway symmetry error measure adopts the method very necessary, this is because the workpiece of actual processing is owing to affecting by factors such as process equipment precision, stress deformations, the shape of axle be not one desirable cylindrical, have certain scale error, i.e. deviation from cylindrical form.
The utility model (invention) beneficial effect is: this measurement mechanism can measure the symmetry error of shaft key groove quickly and easily, for the production of on-site on-line measurement, outside the methods such as three-dimensional coordinates measurement keyway symmetry, find another kind of practical approach.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model (invention) is described further.
Fig. 1 is the structural representation of the utility model (invention).
The title of piece mark numeral is as follows: 1--swiveling wheel, 2--cover plate, 3--screw, 4--main scale, 5--lock-screw, the secondary chi of 6--, 7-jackscrew, 8--fixed grid, 9--moving grid, the secondary dipstick metering pawl of 10-, 11--base plate, 12--clamping and positioning block 1,13--clamping and positioning block 2,14--bolt.
Embodiment
1. in FIG, this gauge is placed on the keyway of measured workpiece axle, secondary chi does not contact workpiece, two clamping and positioning blocks 12,13 put into keyway, clockwise or rotate counterclockwise swiveling wheel 1, the distance between two clamps increases or reduces, and the side of two clamping and positioning blocks is with the contacts side surfaces of hole keyway or be separated, when the side of two clamping and positioning blocks have pressure to contact with key slot side, swiveling wheel 1 manually turn motionless time, clamping and positioning work completes.
2. along main scale 4 length direction moving sets chi 6, secondary dipstick metering pawl 10 contacts with the cylindrical of workpiece spindle, and moving grid 9 demonstrates now shift value a1.
3. unload gauge, horizontally rotate 180 °, repeat above-mentioned 1., 2. step, measure the shift value a of secondary dipstick metering pawl 10 engagement shaft keyway opposite side cylindrical
2.
4. the absolute value of the difference of twice moving grid display shift value and f=|a
1-a
2|, be axle keyway symmetry error.If press the reset button of moving grid display in above-mentioned 2. step, then f=|a
2| be hole keyway symmetry error.
Claims (3)
1. an axle keyway symmetry error measure gauge, it comprises swiveling wheel, cover plate, main scale, secondary chi, fixed grid, moving grid, base plate, clamping and positioning block, bolt part, it is characterized in that: two clamping and positioning blocks, bolt are contained in main scale side's shell; Swiveling wheel is contained in bolt end; Cover plate, base plate are fixed by screws on the square shell of main scale; Fixed grid, moving grid are contained on main scale, secondary chi respectively; Secondary chi moves back and forth on main scale; Secondary dipstick metering pawl contacts with measured axis cylindrical.
2. axle keyway symmetry error measure gauge according to claim 1, is characterized in that: swiveling wheel and bolt are fixed together by jackscrew; When rotating clockwise swiveling wheel, two clamping and positioning block reverse directions move or move in opposite directions; When rotating counterclockwise swiveling wheel, two clamping and positioning blocks move or movement on the contrary in opposite directions.
3. axle keyway symmetry error measure gauge according to claim 1, is characterized in that: bolt is equipped with can along the voussoir of its axis movement, and voussoir coordinates with wedge surface form with clamping and positioning block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420453655.XU CN204612660U (en) | 2014-08-13 | 2014-08-13 | Axle keyway symmetry error measure gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420453655.XU CN204612660U (en) | 2014-08-13 | 2014-08-13 | Axle keyway symmetry error measure gauge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204612660U true CN204612660U (en) | 2015-09-02 |
Family
ID=53965213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420453655.XU Expired - Fee Related CN204612660U (en) | 2014-08-13 | 2014-08-13 | Axle keyway symmetry error measure gauge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204612660U (en) |
-
2014
- 2014-08-13 CN CN201420453655.XU patent/CN204612660U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Liu Qihe Document name: Notification to Pay the Fees |
|
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Liu Qihe Document name: Notification of Termination of Patent Right |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150902 Termination date: 20180813 |