CN208998768U - A kind of positioning fixture for standard ball roundness measurement - Google Patents
A kind of positioning fixture for standard ball roundness measurement Download PDFInfo
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- CN208998768U CN208998768U CN201821955434.7U CN201821955434U CN208998768U CN 208998768 U CN208998768 U CN 208998768U CN 201821955434 U CN201821955434 U CN 201821955434U CN 208998768 U CN208998768 U CN 208998768U
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- side plate
- optical axis
- straight line
- standard ball
- line optical
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Abstract
The utility model relates to test devices, in particular to a kind of positioning fixture for standard ball roundness measurement, positioning fixture includes supporting part for placing standard ball and the fixed part being fixed on supporting part on the scroll chuck of roundness measuring equipment, supporting part includes orthogonal bottom plate, first side plate and the second side plate, bottom plate, first side plate and the second side plate intersection form a three-dimensional right angle, first side plate and the second side plate are equipped with threaded hole, threaded hole and adjusting nut cooperate the adjustment to realize standard ball position, fixed part includes the first straight line optical axis and second straight line optical axis for being vertically set on the lower surface of base plate, first straight line optical axis or second straight line optical axis are placed on the scroll chuck of roundness measuring equipment when use and clamped, then standard ball to be measured is placed on positioning fixture, roundness measuring equipment can be started to measure standard ball.The utility model can the measured standard ball of self-centering positioning, it is reproducible, it is easy to operate, improve the measurement efficiency and precision of standard ball.
Description
Technical field
The utility model relates to test device, in particular to a kind of positioning fixture for standard ball roundness measurement.
Background technique
Contourgraph is the instrument of the profile to object, two-dimensional, two-dimension displacement progress Test And Checkout, is surveyed as precision
Measuring appratus is widely used in piece surface profile measurement field.Contourgraph needs to select sensor/probe before use
It selects and corrects, being corrected standard component required for setting includes ball standard, general abbreviation standard ball.Standard ball is as calibration
Sensor/probe reference sphere, it is general to be made of the materials such as ceramics, glass, tungsten carbide, and because standard ball is related to stylus
Precision, so the required precision to standard ball is very high, but also must have high rigidity, high-wearing feature, antistatic, anti-
Magnetic, good insulation preformance, pyroconductivity is low, anti-acid-base property is good, the every characteristic of extremely low surface roughness etc., can prevent because
Environmental factor has an impact standard ball.When standard ball is that probe verifies, principle is come according to the position of standard ball and size
Determine ruby diameter on stylus, the precision checking of stylus will have a direct impact on the accuracy finally measured, so standard ball exists
Factory is required by stringent accuracy test, while the standard ball after use is also required to often regularly verify it.
The general circularity for passing through roundness measuring equipment measurement standard ball at present, but due to lacking applicable positioning fixture, lead to standard
For ball in measurement, centering positioning is time-consuming and laborious, and efficiency is extremely low.
Utility model content
In view of the above problems in the prior art, the purpose of this utility model is to provide one kind to be used for standard ball roundness measurement
Positioning fixture, which can be placed on the scroll chuck of roundness measuring equipment and clamp, and standard ball to be measured is then placed on locating clip
On tool, the circularity that roundness measuring equipment measures standard ball to be measured can be started.
The utility model provides a kind of positioning fixture for standard ball roundness measurement, including to place standard ball
Supporting part and the fixed part composition being fixedly connected to the scroll chuck with roundness measuring equipment；
The supporting part includes bottom plate, the first side plate and the second side plate, and the bottom plate, the first side plate and the second side plate are two-by-two
Vertically, three plate intersections form a three-dimensional right angle；
The fixed part includes first straight line optical axis and second straight line optical axis, the first straight line optical axis and second straight line light
Axis is vertically set on the lower surface of the bottom plate.
Further, first side plate and the second side plate are equipped with threaded hole, and the threaded hole and adjusting nut cooperate
To realize the adjustment of standard ball position；
Specifically, several threaded holes are distributed on first side plate and the second side plate, under normal circumstances, standard to be measured
The size of ball is fixed；When adjusting nut is in initial position, standard ball to be measured is placed on positioning fixture, standard ball
The big ball centre of sphere is overlapped with the axle center of first straight line optical axis, and the bead centre of sphere of standard ball is overlapped with the axle center of second straight line optical axis；When
When needing to measure the standard ball of various criterion, fine position can be carried out to measured standard ball by adjusting nut, so that greatly
The centre of sphere of ball and the centre of sphere of bead are overlapped with the axle center of first straight line optical axis and second straight line optical axis respectively.
Further, the positioning fixture is metal steel material, in the circularity of measurement standard ball, standard ball to be measured and fixed
Position fixture is by frictional force come synchronous revolving；Contact due to fixture with standard ball is that steel is contacted with steel, and general coefficient of friction takes
0.1, standard ball quality about 1.2kg, acceleration of gravity usually takes 9.8N/kg, according to the formula of frictional force: F1=μm of g is obtained and is rubbed
Wiping power is about 1.2N；Roundness measuring equipment maximum (top) speed is 10 turns/min, maximum radius 0.15m, according to the formula of centripetal force: F2=mr
ω ^2 show that maximum centrifugal force is about 0.2N, this value is much smaller than frictional force 1.2N, so general normal work face,
Its corresponding roughness, can guarantee the fixed placement of standard ball, will not skid.
Further, when needing the big ball circularity of measurement standard ball, the first straight line optical axis of positioning fixture is placed on circle
It spends on the scroll chuck of instrument and clamps；When needing the bead circularity of measurement standard ball, the second optical axis of positioning fixture is placed on circle
It spends on the scroll chuck of instrument and clamps.
Further, the shape of the bottom plate, the first side plate and the second side plate is rectangular, the first straight line optical axis and
The shape of second straight line optical axis is cylinder.
Specifically, the positioning fixture can be integrally formed by casting technique or is spliced by splicing process, guarantee
The surface that positioning fixture is contacted with part to be detected is normal machined surface, and impulse- free robustness etc. is abnormal.
Further, the distance of plane is 30-35mm where the first side plate of distance of shaft centers of the first straight line optical axis, described
The distance of plane is 27-32mm where the second side plate of distance of shaft centers of first straight line optical axis, and the length of the first straight line optical axis is
65-75mm。
Further, the distance of plane is 85-90mm where the first side plate of distance of shaft centers of the second straight line optical axis, described
The distance of plane is 47-52mm where the second side plate of distance of shaft centers of second straight line optical axis, and the length of the second straight line optical axis is
65-75mm。
Due to above-mentioned technical proposal, the utility model has the following beneficial effects:
(1) positioning fixture provided by the utility model can be used in being justified for standard ball used in contourgraph verification
Degree measurement, can quickly feel relieved measured standard ball when in use.
(2) positioning fixture structure provided by the utility model is simple, low in cost, reproducible, easy to operate, mentions significantly
The high measurement efficiency and precision of standard ball.
Detailed description of the invention
It, below will be to institute in embodiment or description of the prior art in order to illustrate more clearly of the technical solution of the utility model
Attached drawing to be used is needed to be briefly described.It should be evident that the accompanying drawings in the following description is only some of the utility model
Embodiment for those of ordinary skill in the art without creative efforts, can also be attached according to these
Figure obtains other attached drawings.
Fig. 1 is a kind of structural representation of positioning fixture for standard ball roundness measurement provided by the embodiment of the utility model
Figure；
Fig. 2 is the schematic diagram that standard ball provided by the embodiment of the utility model is placed on positioning fixture.
In figure: 10- bottom plate, the first side plate of 11-, the second side plate of 12-, 21- first straight line optical axis, 22- second straight line optical axis,
100- threaded hole.
Specific embodiment
In order to make those skilled in the art better understand the scheme of the utility model, below in conjunction with the utility model reality
The attached drawing in example is applied, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that described
Embodiment is only the embodiment of the utility model a part, instead of all the embodiments.Based on the reality in the utility model
Example is applied, every other embodiment obtained by those of ordinary skill in the art without making creative efforts is all answered
When the range for belonging to the utility model protection.
It should be noted that the specification and claims of the utility model and term " first " in attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so that the embodiments of the present invention described herein can be in addition to scheming herein
Sequence other than those of showing or describe is implemented.In addition, term " includes " and " having " and their any deformation, it is intended that
Non-exclusive include in covering.
Embodiment 1
The present embodiment provides a kind of positioning fixtures for standard ball roundness measurement, and referring to Figure 1, which includes
Supporting part and fixed part；
The supporting part includes bottom plate 10, the first side plate 11 and the second side plate 12, the bottom plate 10, the first side plate 11 and
Two side plates 12 are mutually perpendicular to, and three plate intersections form a three-dimensional right angle；
The fixed part includes first straight line optical axis 21 and second straight line optical axis 22, the first straight line optical axis 21 and second
Straight optical axis 22 is vertically set on the lower surface of the bottom plate 10.
First side plate 11 and the second side plate 12 are equipped with threaded hole 100, and the threaded hole 100 cooperates with adjusting nut
To realize the adjustment of standard ball position, in the present embodiment, the adjusting nut is standard nut, 11 He of the first side plate
Threaded hole 100 on second side plate 12 is spaced setting in same level.
Further, the bottom plate 10, the first side plate 11 and the second side plate 12 are square metal steel plate, the supporting part
It is bolted and is assembled by bottom plate 10, the first side plate 11 and the second side plate 12.
Further, the shape of the first straight line optical axis 21 and second straight line optical axis 22 is cylinder, and described first
Straight optical axis 21 and second straight line optical axis 22, which are threadably secured with the lower surface of bottom plate 10, to be connect.
Embodiment 2
The present embodiment provides a kind of positioning fixtures for standard ball roundness measurement, and referring to Figure 1, which includes
Supporting part and fixed part；
The supporting part includes bottom plate 10, the first side plate 11 and the second side plate 12, the bottom plate 10, the first side plate 11 and
Two side plates 12 are mutually perpendicular to, and three plate intersections form a three-dimensional right angle；
The fixed part includes first straight line optical axis 21 and second straight line optical axis 22, the first straight line optical axis 21 and second
Straight optical axis 22 is vertically set on the lower surface of the bottom plate 10.
First side plate 11 and the second side plate 12 are equipped with threaded hole 100, and the threaded hole 100 cooperates with adjusting nut
To realize position adjustment of the standard ball to be measured on fixture.
Further, the positioning fixture is integrally formed by casting technique.
Embodiment 3
The present embodiment provides a kind of positioning fixtures for standard ball roundness measurement, and referring to Figure 1, which includes
Supporting part and fixed part；
The supporting part includes bottom plate 10, the first side plate 11 and the second side plate 12, the bottom plate 10, the first side plate 11 and
Two side plates 12 are mutually perpendicular to, and three plate intersections form a three-dimensional right angle；
The fixed part includes first straight line optical axis 21 and second straight line optical axis 22, the first straight line optical axis 21 and second
Straight optical axis 22 is vertically set on the lower surface of the bottom plate 10.
First side plate 11 and the second side plate 12 are equipped with threaded hole 100, and the threaded hole 100 cooperates with adjusting nut
To realize the adjustment of standard ball position.
Further, the bottom plate 10, the first side plate 11 and the second side plate 12 are square metal steel plate, the supporting part
It is spliced by bottom plate 10, the first side plate 11 and the second side plate 12 by welding procedure.
Further, the shape of the first straight line optical axis 21 and second straight line optical axis 22 is cylinder, and described first
Straight optical axis 21 and second straight line optical axis 22, which are threadably secured with the lower surface of bottom plate 10, to be connect.
Test fixture provided in this embodiment includes the space right-angle and two optical axises being made of bottom plate and two side plates
Composition, two side plates are equivalent to datum plane, the pedestal of standard ball to be measured are placed in the bottom plate of positioning fixture under normal conditions
On, the two sides of pedestal can guarantee the big ball alignment first straight line optical axis of standard ball to be measured, to mark respectively close to datum plane
The bead of quasi- ball is directed at second straight line optical axis, threaded hole is additionally provided on the datum plane, if you need to measure various sizes of standard
Adjusting nut can be used to carry out fine position to measured standard ball for ball.It is automatic that the utility model can treat survey standard ball
Centering positioning, it is of simple structure and low cost, it is reproducible, it is easy to operate, substantially increase the measurement efficiency and essence of standard ball
Degree.
Each technical characteristic of above embodiments can be combined arbitrarily, for simplicity of description, not to above-described embodiment
In each technical characteristic it is all possible combination be all described, as long as however, the combination of these technical characteristics be not present lance
Shield all should be considered as described in this specification.
Above embodiments only express the several embodiments of the utility model, and the description thereof is more specific and detailed, but simultaneously
The limitation to utility model patent range therefore cannot be interpreted as.It should be pointed out that for the ordinary skill people of this field
For member, without departing from the concept of the premise utility, various modifications and improvements can be made, these belong to this reality
With novel protection scope.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.
Claims (6)
1. a kind of positioning fixture for standard ball roundness measurement, it is characterised in that: including supporting part and fixed part；
The supporting part includes bottom plate (10), the first side plate (11) and the second side plate (12), the bottom plate (10), the first side plate
(11) and the second side plate (12) is vertical two-by-two, and three plate intersections form a three-dimensional right angle；
The fixed part includes first straight line optical axis (21) and second straight line optical axis (22), the first straight line optical axis (21) and
Two straight optical axis (22) are vertically set on the lower surface of the bottom plate (10).
2. the positioning fixture according to claim 1 for standard ball roundness measurement, it is characterised in that: first side plate
(11) and the second side plate (12) is equipped with threaded hole (100), and the threaded hole (100) and adjusting nut cooperate to realize standard
The adjustment of ball position.
3. the positioning fixture according to claim 2 for standard ball roundness measurement, it is characterised in that: the bottom plate
(10), the shape of the first side plate (11) and the second side plate (12) is rectangular.
4. the positioning fixture according to claim 3 for standard ball roundness measurement, it is characterised in that: the first straight line
The distance of plane where the first side plate of distance of shaft centers (11) of optical axis (21) is 30-35mm, the axis of the first straight line optical axis (21)
Distance of the heart away from plane where the second side plate (12) is 27-32mm, and the length of the first straight line optical axis (21) is 65-75mm.
5. the positioning fixture according to claim 3 for standard ball roundness measurement, it is characterised in that: the second straight line
The distance of plane where the first side plate of distance of shaft centers (11) of optical axis (22) is 85-90mm, the axis of the second straight line optical axis (22)
Distance of the heart away from plane where the second side plate (12) is 47-52mm, and the length of the second straight line optical axis (22) is 65-75mm.
6. the positioning fixture according to claim 1 for standard ball roundness measurement, it is characterised in that: the first straight line
The shape of optical axis (21) and second straight line optical axis (22) is cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821955434.7U CN208998768U (en) | 2018-11-26 | 2018-11-26 | A kind of positioning fixture for standard ball roundness measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821955434.7U CN208998768U (en) | 2018-11-26 | 2018-11-26 | A kind of positioning fixture for standard ball roundness measurement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208998768U true CN208998768U (en) | 2019-06-18 |
Family
ID=66807120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821955434.7U Active CN208998768U (en) | 2018-11-26 | 2018-11-26 | A kind of positioning fixture for standard ball roundness measurement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208998768U (en) |
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2018
- 2018-11-26 CN CN201821955434.7U patent/CN208998768U/en active Active
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