CN109780962A - The measurement method of node deviation measuring instrument and node deviation - Google Patents
The measurement method of node deviation measuring instrument and node deviation Download PDFInfo
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- CN109780962A CN109780962A CN201910147499.1A CN201910147499A CN109780962A CN 109780962 A CN109780962 A CN 109780962A CN 201910147499 A CN201910147499 A CN 201910147499A CN 109780962 A CN109780962 A CN 109780962A
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Abstract
The invention discloses a kind of node deviation measuring instrument and the measurement methods of node deviation, node deviation measuring instrument is used to measure the deviation situation of cruciform joint, node deviation measuring instrument includes the first benchmark edge, and the first benchmark edge is used for the surface of the first plate against cruciform joint；Second benchmark edge, the second benchmark edge are used for the surface of the second plate against cruciform joint；Edge and measuring basis line are measured, measuring basis line is arranged along the center line for the third plate for being parallel to cruciform joint, and the extension line of measuring basis line intersects with the intersection point of the first benchmark edge and the second benchmark edge, and measurement edge is parallel with measuring basis line or is overlapped.Since the extension line of measuring basis line intersects with the intersection point of the first benchmark edge and the second benchmark edge, therefore with measuring basis line it is parallel or be overlapped measurement edge deviation a reference value can by substitution each plate of cruciform joint thickness with it is angled immediately arrive at, improve the use versatility of node deviation measuring instrument.
Description
Technical field
The present invention relates to shipbuilding field, in particular to the measurement side of a kind of node deviation measuring instrument and node deviation
Method.
Background technique
In entire Ship Structure construction, by largely (also referred to as being saved by the cruciform joint that three blocks of upper, middle and lower steel plate forms
Point), if these cruciform joints are located at the key area or key position of hull, when that three blocks of steel plates assemble, center line
Centering situation must be tightly controlled.
As shown in Figure 1, three pieces of plate (P of cruciform joint 101、P2、P3) center line L when intersecting at a point, be more advantageous to
The natural transmitting of power, stress caused by reducing structure discontinuously is concentrated, so as to reduce structural failure risk at node.
It in the practical manufacturing process of hull, detects, uses in order to the deviation situation at the scene to cruciform joint
Be the node deviation measuring instrument with three true edges, by three blocks of plates that three true edges are successively resisted against to cruciform joint
Surface, judge whether the cruciform joint meets the requirements by the practical contact situation of three true edges.
However, even if the cruciform joint of different location, there is also difference changes for the thickness of three blocks of plates in same hull interior
Change.Therefore, for the cruciform joint of different plate thickness, it is necessary to make corresponding node deviation measuring instrument, node deviation is caused to be surveyed
The quantity for measuring instrument is various, so that not having versatility to the difficult management of node deviation measuring instrument.
Summary of the invention
The technical problem to be solved by the present invention is in order to overcome the dimensions of node deviation measuring instrument in the prior art more,
Do not have the defect of versatility, the measurement method of a kind of node deviation measuring instrument and node deviation is provided.
The present invention is to solve above-mentioned technical problem by following technical proposals:
A kind of node deviation measuring instrument is used to measure the deviation situation of cruciform joint, the node deviation measuring instrument tool
Have:
First benchmark edge, the first benchmark edge are used for the surface of the first plate against the cruciform joint；
Second benchmark edge, the second benchmark edge are used for the surface of the second plate against the cruciform joint；
Measuring basis line, center line setting of the measuring basis line along the third plate for being parallel to the cruciform joint, institute
The extension line for stating measuring basis line intersects with the intersection point of the first benchmark edge and the second benchmark edge；
Edge is measured, the measurement edge is overlapped with the measuring basis line, or to be arranged in parallel in the measuring basis line remote
Side from the third plate.
The node deviation measuring instrument is measured by the measurement edge of setting and the center line keeping parallelism of third plate with passing through
Actual range between the measurement edge and the center line (or surface of third plate) of third plate out, and by the actual range and deviation
A reference value is compared to be judged with the deviation situation to measured cruciform joint, and due to the measurement parallel with measurement edge
The extension line of reference line intersects with the intersection point of the first benchmark edge and the second benchmark edge, and the deviation a reference value for measuring edge can pass through substitution
The thickness of each plate of cruciform joint with it is angled direct easy obtain, therefore, for the cross of equal angular but different plate thickness
Connector, it is only necessary to which one piece of node deviation measuring instrument can meet measurement request, improve the use versatility of node deviation measuring instrument.
Preferably, being equipped with corner cut between the first benchmark edge and the second benchmark edge.
The corner cut is used to avoid leg between the first plate of cruciform joint and the second plate, avoids in measurement process with ten
Word connector generates interference and lead to the first benchmark edge and the second benchmark edge and cruciform joint is bonded inaccuracy.
Preferably, the node deviation measuring instrument is that plate structure is convenient for carrying so that its volume is effectively reduced.
Preferably, the surface of the node deviation measuring instrument is equipped with aperture.
The aperture is for for user, when measuring cruciform joint deviation, hand to be protruded into and held, to promote the node deviation
The property easy to use of measuring instrument.
A kind of measurement method of node deviation is used to measure the deviation situation of cruciform joint, the survey of the node deviation
Amount method uses node deviation measuring instrument as described above, the measurement method of the node deviation the following steps are included:
The thickness t of first plate of S1, acquisition cruciform joint to be measured1, the second plate thickness t2, the first plate and the second plate
Angle β, the angle theta of the second plate and third plate and the measuring basis line of the node deviation measuring instrument and measurement edge spacing z；
S2, pass through the thickness t of first plate1, the second plate thickness t2, the first plate and the second plate angle β, the second plate
And the angle theta and spacing z of third plate calculate the deviation a reference value a of third plate, and the calculation formula of the deviation a reference value a is
S3, the first benchmark edge is resisted against the cruciform joint the first plate surface, by the second benchmark edge
It is resisted against the surface of the second plate of the cruciform joint, measures the center line of the third plate of the measurement edge and the cruciform joint
Actual range a1；
S4, according to the deviation a reference value a and the actual range a1, judge the deviation situation of the cruciform joint.
Node deviation measuring instrument is utilized in the measurement method of the node deviation, by comparing deviation a reference value a and it is practical away from
From a1Size relation, judge the deviation situation of the cruciform joint.Wherein, due to the measuring basis line of node deviation measuring instrument
Extension line intersects with the intersection point of the first benchmark edge and the second benchmark edge, therefore for the cruciform joint of different dimensions, deviation
A reference value a is only needed by by the thickness t of the first plate1, the second plate thickness t2, the angle β of the first plate and the second plate, the second plate with
The angle theta and measuring basis line of third plate and the spacing z of measurement edge substitute into above-mentioned calculation formula and can simply calculate, effectively letter
Measurement difficulty is changed.
Preferably, the step S4 of the measurement method of the node deviation are as follows: pass through maximum permissible aberration value a0With it is described partially
Poor a reference value a calculates deviation the tolerance band a ', the deviation tolerance band a ' and the actual range a of third plate1,
The deviation situation of the cruciform joint is judged, further to judge the deviation of cruciform joint whether within tolerance band.
Preferably, the maximum permissible aberration value a0No more than the one third of the most lamella thickness of the cruciform joint,
And it is not more than 5mm.
A kind of measurement method of node deviation is used to measure the deviation situation of cruciform joint, the survey of the node deviation
Amount method uses node deviation measuring instrument as described above, the measurement method of the node deviation the following steps are included:
The thickness t of first plate of S1, acquisition cruciform joint to be measured1, the second plate thickness t2, third plate thickness t3、
The measuring basis line of the angle β of first plate and the second plate, the angle theta of the second plate and third plate and the node deviation measuring instrument with
Measure the spacing z of edge；
S2, pass through the thickness t of first plate1, the second plate thickness t2, third plate thickness t3, the first plate and the second plate
Angle β, the second plate and third plate angle theta and spacing z calculate deviation a reference value b, the deviation a reference value b of third plate
Calculation formula be
S3, the first benchmark edge is resisted against the cruciform joint the first plate surface, by the second benchmark edge
It is resisted against the surface of the second plate of the cruciform joint, described in the third plate direction for measuring the measurement edge and the cruciform joint
Measure the actual range b on the surface of edge side1；
S4, according to the deviation a reference value b and the actual range b1, judge the deviation situation of the cruciform joint.
Node deviation measuring instrument is utilized in the measurement method of the node deviation, by comparing deviation a reference value b and it is practical away from
From b1Size relation, judge the deviation situation of the cruciform joint.Wherein, due to the measuring basis line of node deviation measuring instrument
Extension line intersects with the intersection point of the first benchmark edge and the second benchmark edge, therefore for the cruciform joint of different dimensions, deviation
A reference value b is only needed by by the thickness t of the first plate1, the second plate thickness t2, third plate thickness t3, the first plate and the second plate
Angle β the angle theta of the second plate and third plate and the spacing z of measuring basis line and measurement edge substitute into above-mentioned calculation formula
It is simple to calculate, it is effectively simplified measurement difficulty.
Preferably, the step S4 of the measurement method of the node deviation are as follows: pass through maximum permissible aberration value b0With it is described partially
Poor a reference value b calculates deviation the tolerance band b ', the deviation tolerance band b ' and the actual range b of third plate1,
The deviation situation of the cruciform joint is judged, further to judge the deviation of cruciform joint whether within tolerance band.
Preferably, the maximum permissible aberration value b0No more than the one third of the most lamella thickness of the cruciform joint,
And it is not more than 5mm.
The positive effect of the present invention is that:
In the measurement method of the node deviation measuring instrument and node deviation, node deviation measuring instrument passes through setting and third plate
Center line keeping parallelism measuring basis line, with by measurement obtain it is parallel with the measuring basis line or coincidence measurement edge phase
For the actual range between the center line (or surface of third plate) of third plate, and by the actual range and deviation a reference value into
Row compares to be judged with the deviation situation to measured cruciform joint, and due to the extension line of measuring basis line and the first base
The intersection point of quasi- edge and the second benchmark edge intersection, measure edge deviation a reference value can by substitute into each plate of cruciform joint thickness and institute
Angled direct easy obtains, therefore, for the cruciform joint of equal angular but different plate thickness, it is only necessary to which one piece of node deviation is surveyed
Amount instrument can meet measurement request, improve the use versatility of node deviation measuring instrument.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the cruciform joint of the prior art.
Fig. 2 is the structural schematic diagram of the node deviation measuring instrument of the embodiment of the present invention 1.
Fig. 3 is the use state diagram of the node deviation measuring instrument of the embodiment of the present invention 1.
Fig. 4 is the structural schematic diagram of cruciform joint of the invention.
Fig. 5 is the flow diagram of the measurement method of the node deviation of the embodiment of the present invention 1.
Fig. 6 is the use state diagram of the node deviation measuring instrument of the embodiment of the present invention 2.
Fig. 7 is the flow diagram of the measurement method of the node deviation of the embodiment of the present invention 2.
Fig. 8 is the use state diagram of the node deviation measuring instrument of the embodiment of the present invention 3.
Fig. 9 is the use state diagram of the node deviation measuring instrument of the embodiment of the present invention 4.
Description of symbols:
The prior art
Cruciform joint 10
Center line L
The present invention
Node deviation measuring instrument 20
First benchmark edge 21
Second benchmark edge 22
Measure edge 23, measuring basis line 231, spacing z
Corner cut 24
Aperture 25
Cruciform joint 10
First plate P1, thickness t1
Second plate P2, thickness t2
Third plate P3, thickness t3, center line L3
Step S101~104
Step S201~204
Specific embodiment
The present invention is further illustrated below by the mode of embodiment, but does not therefore limit the present invention to the reality
It applies among a range.
Embodiment 1
As shown in Figures 2 and 3, the present invention provides a kind of node deviation measuring instrument 20, is used to measure cruciform joint 10
Deviation situation, the node deviation measuring instrument 20 have the first benchmark edge 21, the second benchmark edge 22, measuring basis line and measurement edge
23.Wherein, the first benchmark edge 21 is used to be resisted against the first plate P of cruciform joint 101Surface on, the second benchmark edge 22 is for supporting
Lean against the second plate P of cruciform joint 102Surface on, measuring basis line is along the third plate P for being parallel to cruciform joint 103In
Heart line L3Setting, and the extension line of the measuring basis line intersects with the intersection point of the first benchmark edge 21 and the second benchmark edge 22, and save
The measurement edge 23 of point deviation measuring apparatus 20 then coincides with the measuring basis line.
The node deviation measuring instrument 20 passes through setting and third plate P3Center line L3The measuring basis line of keeping parallelism, with
By measuring the measurement edge 23 and third plate P that show that the measuring basis line is overlapped3Center line L3Between actual range a1, and
By actual range a1And deviation a reference value a is compared to be judged with the deviation situation to measured cruciform joint 10.
Specifically, if actual range a1Greater than deviation a reference value a, then third plate P3Towards the direction for being away from node deviation measuring instrument 20
Deviate, if actual range a1Less than deviation a reference value a, then third plate P3Deviate towards the direction close to node deviation measuring instrument 20.
And intersected by making the extension line of measuring basis line and the intersection point of the first benchmark edge 21 and the second benchmark edge 22, to pair
The standard of setting measurement 23 position of edge should be provided in the node deviation measuring instrument 20 of the cruciform joint 10 of different angle, convenient for section
Point deviation measuring apparatus 20 is standardized management.Further, since the extension line of measuring basis line and the first benchmark edge 21 and second
The intersection point of benchmark edge 22 intersects, therefore the deviation a reference value a of node deviation measuring instrument 20 only needs first by cruciform joint 10
Plate P1Thickness t1, the second plate P2Thickness t2, the first plate P1With the second plate P2Angle β, the second plate P2With third plate P3Angle
The spacing z of θ and measuring basis line and measurement edge 23 can directly be calculated (referring to fig. 4), and specific calculation formula isTherefore, when measuring the cruciform joint 10 of different plate thickness, it is only necessary to by above-mentioned ginseng
Number substitutes into the deviation a reference value a that formula can directly calculate the cruciform joint 10 of the corresponding plate thickness, so as to cruciform joint 10
Deviation measurement is simpler quick.
Wherein, it should be strongly noted that due in the present embodiment, measurement edge 23 is overlapped with measuring basis line, therefore
The numerical values recited of spacing z is zero, and actual influence can't be generated to the numerical values recited of deviation a reference value a, thus, in subsequent meter
It calculates in formula, the z that numerical values recited is zero is omitted.
Therefore, for the cruciform joint 10 of equal angular but different plate thickness, it is only necessary to use one piece of node provided by the invention
Deviation measuring apparatus 20 can meet measurement request, improve the use versatility of node deviation measuring instrument 20.
As shown in figure 3, being equipped with corner cut between the first benchmark edge 21 and the second benchmark edge 22 of the node deviation measuring instrument 20
24, which is used to avoid the first plate P of cruciform joint 101With the second plate P2Between leg, avoid in measurement process with
Cruciform joint 10 generates interference and causes the fit-state of the first benchmark edge 21 and the second benchmark edge 22 and cruciform joint 10 inaccurate
Really.Specifically, the size of the corner cut 24 can be that (wherein, C takes for the triangle corner cut of C × C or circular arc corner cut that radius is C
Value is no less than maximum leg length, can carry out value by the maximum plate thickness of the cruciform joint 10 not less than 0.6 times).
Preferably, which is that plate structure is convenient for carrying so that its volume is effectively reduced.The node
Aperture 25 is additionally provided on the surface of deviation measuring apparatus 20, which is used for for user when measuring 10 deviation of cruciform joint
Hand is protruded into and is held, to promote the property easy to use of the node deviation measuring instrument 20.
As shown in figure 5, being used to measure the inclined of cruciform joint 10 the present embodiment provides a kind of measurement method of node deviation
Poor situation, this method have used node deviation measuring instrument 20 as described above, and the measurement method of the node deviation specifically includes
Following steps:
S101, the first plate P for obtaining cruciform joint 10 to be measured1Thickness t1, the second plate P2Thickness t2, the first plate P1
With the second plate P2Angle β and the second plate P2With third plate P3Angle theta；
S102, pass through the first plate P1Thickness t1, the second plate P2Thickness t2, the first plate P1With the second plate P2Angle β and
Second plate P2With third plate P3Angle theta calculate third plate P3Deviation a reference value a, the calculation formula of deviation a reference value a is
S103, the first plate P that the first benchmark edge 21 of node deviation measuring instrument 20 is resisted against to cruciform joint 101Table
Second benchmark edge 22 of node deviation measuring instrument 20 is resisted against the second plate P of cruciform joint 10 by face2Surface, measuring node
The third plate P of the measurement edge 23 and cruciform joint 10 of deviation measuring apparatus 203Center line L3Actual range a1；
The deviation a reference value a that S104, basis the are calculated and actual range a measured1, judge the inclined of the cruciform joint 10
Poor situation.
Node deviation measuring instrument 20 is utilized in the measurement method of the node deviation, by comparing deviation a reference value a and reality
Distance a1Size relation, judge the deviation situation of the cruciform joint 10.Wherein, due to the measurement base of node deviation measuring instrument 20
The extension line of directrix intersects with the intersection point of the first benchmark edge 21 and the second benchmark edge 22, therefore for the cross of different dimensions
Connector 10, deviation a reference value a are only needed by by the first plate P1Thickness t1, the second plate P2Thickness t2, the first plate P1With the second plate
P2Angle β and the second plate P2With third plate P3Angle theta substitute into above-mentioned calculation formula and can simply calculate, thus effectively letter
Measurement difficulty is changed.
Wherein, since in the present embodiment, measurement edge 23 is overlapped with measuring basis line, therefore its spacing z is zero, therefore will
In the measurement method of node deviation, to the calculation formula of deviation a reference value a: Carry out letter
Change, will wherein be zero z omission.
In addition, when the true form of cruciform joint 10 is positive cruciform joint (i.e. the first plate P as shown in Figure 41With the second plate
P2Angle β=90 °) when, the calculation formula of deviation a reference value a can be further simplified as
The step S104 of the measurement method of the node deviation, specifically can be with are as follows: pass through maximum permissible aberration value a0With it is inclined
Poor a reference value a calculates third plate P3Deviation tolerance band a ', compare deviation tolerance band a ' and actual range a1, with judgement
The deviation situation of cruciform joint 10, i.e. deviation tolerance band a ' should be in a ± a0Between, further to judge cruciform joint 10
Whether deviation is within tolerance band.
Wherein, to maximum permissible aberration value a0A kind of more preferred determining method are as follows: maximum permissible aberration value a0Do not surpass
The one third of the most lamella thickness of cruciform joint 10 is crossed, and is not more than 5mm.That is a0≤Min(tmin/ 3,5).
Embodiment 2
As shown in Fig. 3, Fig. 4 and Fig. 6, the present embodiment also provides a kind of measurement method of node deviation, for measuring cross
The deviation situation of connector 10, this method have also used node deviation measuring instrument 20 as described in Example 1, this method it is specific
Steps are as follows:
S201, the first plate P for obtaining cruciform joint 10 to be measured1Thickness t1, the second plate P2Thickness t2, third plate P3
Thickness t3, the first plate P1With the second plate P2Angle β and the second plate P2With third plate P3Angle theta；
S202, pass through the first plate P1Thickness t1, the second plate P2Thickness t2, third plate P3Thickness t3, the first plate P1With
Second plate P2Angle β and the second plate P2With third plate P3Angle theta calculate third plate P3Deviation a reference value b, the deviation base
The calculation formula of quasi- value b is
S203, the first plate P that the first benchmark edge 21 of node deviation measuring instrument 20 is resisted against to cruciform joint 101Table
Second benchmark edge 22 of node deviation measuring instrument 20 is resisted against the second plate P of cruciform joint 10 by face2Surface, measuring node
The third plate P of the measurement edge 23 and cruciform joint 10 of deviation measuring apparatus 203Towards the actual range on the surface of measurement 23 side of edge
b1；
The deviation a reference value b that S204, basis the are calculated and actual range b measured1, judge the inclined of the cruciform joint 10
Poor situation.
The measurement method of node deviation provided in this embodiment is except can be realized and the measurement of the node deviation in embodiment 1
Other than the identical effect of method, there is also superior technique effects: due to introducing third plate P3Thickness t3For calculating
Deviation a reference value b enables the measurement method directly to measurement edge 23 and third plate P3The spacing on surface measure, from
And it compares in embodiment 1 to third plate P3Center line L3The mode measured is simpler convenient, and the scene behaviour that is more convenient for
Make.
Wherein, since in the present embodiment, measurement edge 23 is overlapped with measuring basis line, therefore its spacing z is zero, therefore will
In the measurement method of node deviation, the calculation formula of deviation a reference value b is It carries out
Simplify, will wherein be zero z omission.
And when the true form of cruciform joint 10 is positive cruciform joint (i.e. the first plate P as shown in Figure 41With the second plate P2
Angle β=90 °) when, the calculation formula of deviation a reference value b can be further simplified as
The step S204 of the measurement method of the node deviation, specifically can be with are as follows: pass through maximum permissible aberration value b0With it is inclined
Poor a reference value b calculates third plate P3Deviation tolerance band b ', compare deviation tolerance band b ' and actual range b1, with judgement
The deviation situation of cruciform joint 10, i.e. deviation tolerance band b ' should be in b ± b0Between, further to judge cruciform joint 10
Whether deviation is within tolerance band.
Wherein, to maximum permissible aberration value b0A kind of more preferred determining method are as follows: maximum permissible aberration value b0Do not surpass
The one third of the most lamella thickness of cruciform joint 10 is crossed, and is not more than 5mm.That is b0≤Min(tmin/ 3,5).
Embodiment 3
The present embodiment also provides a kind of node deviation measuring instrument 20, the structure with the node deviation measuring instrument of embodiment 1
It is roughly the same, the difference is that, in the present embodiment, the measurement edge 23 of the node deviation measuring instrument 20 is not and measurement base
Directrix 231 coincides, but is arranged in parallel in the side that the measuring basis line 231 is away from third plate.That is measurement edge 23 and survey
Keeping parallelism between reference line 231 is measured, therefore, in the formula for calculating deviation a reference value a, the numerical value of spacing z is not 0.
Specifically, measured by the node deviation measuring instrument 20 in cruciform joint 10, the thickness t of third plate3Greatly
In the thickness t of the first plate1Or second plate thickness t2When, the node deviation measuring instrument 20 provided using embodiment 1 will appear
Following situations: as the first plate P for needing for the first benchmark edge 21 to be resisted against cruciform joint1Surface, and by the second benchmark edge 22
It is resisted against the second plate P of cruciform joint2Surface when, it is found that the measurement edge 23 to coincide with measuring basis line 231 with
The surface of the third plate of cruciform joint produces interference, therefore, in the present embodiment, as shown in figure 8, making to measure the opposite survey of edge 23
Reference line 231 is measured away from third plate P3The direction on surface deviates, and generates to avoid the case where above-mentioned interference.
And the calculating about deviation a reference value a, refer to the calculation formula in embodiment 1: It can directly calculate for evaluating third plate P3Center line L3Relative to measurement edge 23 it is practical away from
From a1Whether satisfactory deviation a reference value a.
In addition, being used about the spacing z between measurement edge 23 and measuring basis line 231 with measuring edge 23 in actual measurement
When do not contact subject to cruciform joint, specifically, spacing z preferably can use each third plate P to be measured3In, most thick
Three plate P3Thickness one third, generally 5~10mm, thoroughly to avoid the measurement edge 23 and thicker third plate P of thickness3Out
Now interfere.
Embodiment 4
The present embodiment also provides a kind of measurement method of node deviation, for measuring the deviation situation of cruciform joint, the party
Method has also used node deviation measuring instrument 20 as described in Example 3, the difference is that, as shown in figure 9, the present embodiment
The measurement method of node deviation is by the first plate P1Thickness t1, the second plate P2Thickness t2, third plate P3Thickness t3,
One plate P1With the second plate P2Angle β, the second plate P2With third plate P3Angle theta and node deviation measuring instrument 20 measurement edge
23 calculate third plate P with the spacing z of measuring basis line 2313Deviation a reference value b, specific calculation formula is
The deviation a reference value b and measurement edge 23 and third plate P that above-mentioned calculation formula is obtained3Between actual range b1Into
Row compares, to evaluate the deviation situation of the cruciform joint 10.Wherein, not due to measurement spacing z of the edge 23 away from measuring basis line 231
It is zero, therefore constant need to be corrected as one in calculation formula and be calculated.
In the description of the present invention, it is to be understood that, term " on ", "lower", "front", "rear", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "top", "bottom", "inner", "outside" is orientation based on the figure or position
Relationship is set, is merely for convenience of description of the present invention and simplification of the description, rather than the device or component of indication or suggestion meaning are necessary
It with specific orientation, is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.
Although specific embodiments of the present invention have been described above, it will be appreciated by those of skill in the art that this is only
For example, protection scope of the present invention is to be defined by the appended claims.Those skilled in the art without departing substantially from
Under the premise of the principle and substance of the present invention, many changes and modifications may be made, but these change and
Modification each falls within protection scope of the present invention.
Claims (10)
1. a kind of node deviation measuring instrument is used to measure the deviation situation of cruciform joint, which is characterized in that the node deviation
Measuring instrument includes
First benchmark edge, the first benchmark edge are used for the surface of the first plate against the cruciform joint；
Second benchmark edge, the second benchmark edge are used for the surface of the second plate against the cruciform joint；
Measuring basis line, center line setting of the measuring basis line along the third plate for being parallel to the cruciform joint, the survey
The extension line of amount reference line intersects with the intersection point of the first benchmark edge and the second benchmark edge；
Edge is measured, the measurement edge is overlapped with the measuring basis line, or is arranged in parallel in the measuring basis line far from institute
State the side of third plate.
2. node deviation measuring instrument as described in claim 1, which is characterized in that the first benchmark edge and second benchmark
Corner cut is equipped between edge.
3. node deviation measuring instrument as described in claim 1, which is characterized in that the node deviation measuring instrument is plate knot
Structure.
4. node deviation measuring instrument as described in claim 1, which is characterized in that the surface of the node deviation measuring instrument is equipped with
Aperture.
5. a kind of measurement method of node deviation, is used to measure the deviation situation of cruciform joint, which is characterized in that the node
The measurement method of deviation uses node deviation measuring instrument according to any one of claims 1-4, the measurement of the node deviation
Method the following steps are included:
The thickness t of first plate of S1, acquisition cruciform joint to be measured1, the second plate thickness t2, the first plate and the second plate folder
The spacing z of angle beta, the measuring basis line of the angle theta of the second plate and third plate and the node deviation measuring instrument and measurement edge；
S2, pass through the thickness t of first plate1, the second plate thickness t2, the first plate and the second plate angle β, the second plate and
The angle theta and spacing z of three plates calculate the deviation a reference value a of third plate, and the calculation formula of the deviation a reference value a is
S3, the first benchmark edge is resisted against the cruciform joint the first plate surface, by the second benchmark edge against
In the surface of the second plate of the cruciform joint, the reality of the center line of the third plate of the measurement edge and the cruciform joint is measured
Border distance a1；
S4, according to the deviation a reference value a and the actual range a1, judge the deviation situation of the cruciform joint.
6. the measurement method of node deviation as claimed in claim 5, which is characterized in that the measurement method of the node deviation
Step S4 are as follows: pass through maximum permissible aberration value a0The deviation tolerance band a ' that third plate is calculated with the deviation a reference value a, than
The deviation tolerance band a ' and the actual range a1, judge the deviation situation of the cruciform joint.
7. the measurement method of node deviation as claimed in claim 6, which is characterized in that the maximum permissible aberration value a0Do not surpass
The one third of the most lamella thickness of the cruciform joint is crossed, and is not more than 5mm.
8. a kind of measurement method of node deviation, is used to measure the deviation situation of cruciform joint, which is characterized in that the node
The measurement method of deviation uses node deviation measuring instrument according to any one of claims 1-4, the measurement of the node deviation
Method the following steps are included:
The thickness t of first plate of S1, acquisition cruciform joint to be measured1, the second plate thickness t2, third plate thickness t3, first
The angle β of plate and the second plate, the measuring basis line of the angle theta of the second plate and third plate and the node deviation measuring instrument and measurement
The spacing z of edge；
S2, pass through the thickness t of first plate1, the second plate thickness t2, third plate thickness t3, the first plate and the second plate folder
Angle beta, the angle theta of the second plate and third plate and spacing z calculate the deviation a reference value b of third plate, the meter of the deviation a reference value b
Calculating formula is
S3, the first benchmark edge is resisted against the cruciform joint the first plate surface, by the second benchmark edge against
In the surface of the second plate of the cruciform joint, the third plate of the measurement edge and the cruciform joint is measured towards the measurement
The actual range b on the surface of edge side1；
S4, according to the deviation a reference value b and the actual range b1, judge the deviation situation of the cruciform joint.
9. the measurement method of node deviation as claimed in claim 8, which is characterized in that the measurement method of the node deviation
Step S4 are as follows: pass through maximum permissible aberration value b0The deviation tolerance band b ' that third plate is calculated with the deviation a reference value b, than
The deviation tolerance band b ' and the actual range b1, judge the deviation situation of the cruciform joint.
10. the measurement method of node deviation as claimed in claim 9, which is characterized in that the maximum permissible aberration value b0Do not surpass
The one third of the most lamella thickness of the cruciform joint is crossed, and is not more than 5mm.
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