CN109211158A - The method for determining box body hole system processing Position with One Plane and Two Holes positioning datum rotation error - Google Patents
The method for determining box body hole system processing Position with One Plane and Two Holes positioning datum rotation error Download PDFInfo
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- CN109211158A CN109211158A CN201811066224.7A CN201811066224A CN109211158A CN 109211158 A CN109211158 A CN 109211158A CN 201811066224 A CN201811066224 A CN 201811066224A CN 109211158 A CN109211158 A CN 109211158A
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- hole
- box body
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- plane
- holes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
Abstract
A kind of method that the present invention discloses determining box body hole system processing Position with One Plane and Two Holes positioning datum rotation error, step is: drawing cabinet processing technology CAD model according to 1:1 ratio, embodies the geometrical relationship between box body hole system position and setting element；Assuming that positioning pin and location hole foozle are 0, simulation Position with One Plane and Two Holes position fixing process establishes the relationship between setting element and hole system position, establishes two dimensional model using CAD software, defines box body hole and fastens the horizontal coordinate A in the first hole and the horizontal coordinate E in the second hole；Consider the tolerance of setting element, simulator locating process, establish the clockwise model of cabinet machining benchmark and cabinet machining benchmark Reversal model respectively using CAD software, it keeps the centre distance in the first hole and the second hole constant, obtains box body hole and fasten the most large and small value of vertical coordinate in the first hole and the most large and small value of vertical coordinate in the second hole.Such method can determine that box body hole system processes Position with One Plane and Two Holes positioning datum rotation error, and intuitive is good, at low cost, and precision is high.
Description
Technical field
The present invention relates to the two-dimentional modeling methods that a kind of box body hole system processing Position with One Plane and Two Holes positioning datum rotation error determines.
Background technique
Currently, determine rotation error generally use extremum method, it be according to position fixing process, dimension limit and calculation formula into
Row calculates, and still, this method calculates complexity, and error-prone, poor intuition has much room for improvement.Extremum method is in Machine Design and manufacture
Upper to be used for dimensional chain for assembly, processing dimension chain equidimension chain calculates, finally in order to determine the machining accuracy or allowable error of part.
Summary of the invention
The purpose of the present invention is to provide a kind of side of determining box body hole system processing Position with One Plane and Two Holes positioning datum rotation error
Method can determine that box body hole system processes Position with One Plane and Two Holes positioning datum rotation error, and intuitive is good, and at low cost, precision is high.
In order to achieve the above objectives, solution of the invention is:
A kind of method of determining box body hole system processing Position with One Plane and Two Holes positioning datum rotation error, includes the following steps:
Step 1, draw cabinet processing technology CAD model according to 1:1 ratio, embody box body hole system position and setting element it
Between geometrical relationship；
Step 2, it is assumed that the foozle in the diamond positioning pin hole on the diamond positioning pin and cabinet on fixture is 0, fixture
On Cylindrical locating pins and cabinet on Cylindrical locating pins hole foozle be 0, simulation Position with One Plane and Two Holes position fixing process build
The relationship halted between bit unit and hole system position establishes two dimensional model using CAD software, defines box body hole and fastens the first hole
The horizontal coordinate E of horizontal coordinate A and the second hole；
Step 3, consider that it is clockwise to establish cabinet machining benchmark using CAD software for the tolerance of setting element, simulator locating process
The centre distance of model, the first hole and the second hole is constant, obtains the vertical coordinate minimum value and second that box body hole fastens the first hole
The vertical coordinate maximum value in hole；
Step 4, consider that the tolerance of setting element, simulator locating process are established cabinet machining benchmark using CAD software and reversed
The centre distance of model, the first hole and the second hole is constant, obtains the vertical coordinate maximum value and second that box body hole fastens the first hole
The vertical coordinate minimum value in hole.
In above-mentioned steps 2, the content of Position with One Plane and Two Holes position fixing process is: when positioning, make workpiece location hole and detent fit,
Positioning pin axis direction is positioned on fixture.
In above-mentioned steps 3, the diamond positioning pin hole on cabinet is maximized, and the diamond positioning pin on fixture is minimized,
Cylindrical locating pins on fixture are maximized, and Cylindrical locating pins hole is minimized on cabinet.
In above-mentioned steps 4, the diamond positioning pin hole on cabinet is minimized, and the diamond positioning pin on fixture is maximized,
Cylindrical locating pins on fixture are minimized, and the Cylindrical locating pins hole on cabinet is maximized.
After adopting the above scheme, the invention has the characteristics that:
(1) present invention is according to the geometrical relationship of box body hole system position and setting element, and position fixing process when simulating cutting uses
CAD auxiliary tool establishes cabinet processing basic size illustraton of model, the clockwise model of cabinet machining benchmark and cabinet machining benchmark
Reversal model, so that it is determined that hole system vertical coordinate basic size, full-size and minimum dimension, are modeled using AUTO CAD two dimension
Method determines that box body hole system processes Position with One Plane and Two Holes positioning datum rotation error, and intuitive is good, at low cost, and precision is high；
(2) using the order under CAD software " mark " menu, automatic measurement box body hole system vertical coordinate basic size, most
Large scale and minimum dimension.
Detailed description of the invention
Fig. 1 is process principle figure of the invention；
Fig. 2 is case process model figure；
Fig. 3 is cabinet processing basic size illustraton of model；
Fig. 4 is the clockwise illustraton of model of cabinet machining benchmark；
Fig. 5 is cabinet machining benchmark Reversal model figure.
Specific embodiment
Below with reference to attached drawing, technical solution of the present invention and beneficial effect are described in detail.
The present invention provides a kind of method of determining box body hole system processing Position with One Plane and Two Holes positioning datum rotation error, mainly adopts
The mode of two dimensional model is established with CAD auxiliary to realize, as shown in connection with fig. 1, the modeling of cabinet processing technology, which refers to, establishes box body hole system
Process geometrical model, the geometrical relationship between expression processing hole system position and setting element.Basic size modeling refers to foundation positioning
Geometrical relationship model when component tolerances are 0 between setting element and processing hole system position.The clockwise modeling of benchmark refers to foundation positioning
The geometrical model that element tolerance occurs when benchmark being caused to rotate clockwise between setting element and hole system position.Benchmark reverses modeling
Finger establishes the geometrical model that setting element tolerance occurs when benchmark being caused to rotate counterclockwise between setting element and hole system position.Tool
Steps are as follows for body:
1, cabinet processing technology models
Theoretical according to mechanical drawing, mechanical processing technique, the geometry analyzed between box body hole system position and setting element closes
System draws cabinet processing technology CAD model according to 1:1 ratio, designs and express between box body hole system position and setting element
Geometrical relationship, as shown in Figure 2.
Fig. 2 is case process model figure.In Fig. 2,2 holes for needing to process in 1,2 expression box body hole systems, 3 indicate case
Diamond positioning pin hole on body, 4 indicate the diamond positioning pin on fixture, the diamond shape on diamond positioning pin 4 and cabinet on fixture
Dowel hole 3 cooperates；5 indicate the Cylindrical locating pins on fixtures, and 6 indicate the Cylindrical locating pins hole on cabinets, on fixture
Cylindrical locating pins hole 6 on Cylindrical locating pins 5 and cabinet cooperates.At two when pin hole cooperation realization cabinet 1,2 hole machined
Positioning.In order to see that figure is intuitive, two in Fig. 2 at pin hole fit clearance amplification draw.
A indicates the horizontal coordinate (mm) in hole 1, and B indicates that the vertical coordinate (mm) in hole 1, E indicate the horizontal coordinate (mm) in hole 2,
F indicates that the vertical coordinate (mm) in hole 2, L indicate the center between dowel hole away from (mm).
D1 indicates 6 diameter of dowel hole (mm), and D2 indicates 3 diameter of dowel hole (mm), and d1 indicates 5 diameter of positioning pin
(mm), d2 indicates 4 diameter of diamond positioning pin (mm).
JX indicates positioning datum.
Position with One Plane and Two Holes position fixing process: when positioning, make workpiece dowel hole and detent fit, the positioning of positioning pin axis direction
In on fixture.
The generation process of benchmark rotation error: due to positioning pin and dowel hole foozle, JX benchmark back rotation causes
The location error in hole 1 and hole 2.
2, cabinet processing basic size model is established
On the basis of Fig. 2, it is assumed that the foozle of positioning pin and dowel hole is 0, according to technology theory, simulation one side two
Hole position fixing process establishes the relationship between setting element and hole system position, establishes two dimensional model such as Fig. 3 using CAD software.
Fig. 3 is that cabinet processes basic size model.All parameters are the same in Fig. 3.D1=d1 is the basic of setting element 5,6
Size.D2=d2 is the basic size of setting element 3,4.
3, the clockwise model of cabinet machining benchmark is established
On the basis of Fig. 3, consider that the tolerance of setting element, simulator locating process establish cabinet processing base using CAD software
Quasi- clockwise model is as shown in Figure 4.
In Fig. 4, A, E, L is the same.Pin 5 is maximized d1max, and dowel hole 6 is minimized D1min, and rhombus pin 4 takes minimum
Value d2min, dowel hole 3 are maximized D2max.Benchmark, which can rotate clockwise, at this time becomes JX1.
At new benchmark JX1, using the order under CAD software " mark " menu, the vertical coordinate in automatic measurement hole 1 is obtained
Minimum value Bmin and the vertical coordinate in hole 2 obtain maximum value Fmax.
4, cabinet machining benchmark Reversal model is established
On the basis of Fig. 3, consider that the tolerance of setting element, simulator locating process establish cabinet processing base using CAD software
Quasi- Reversal model is as shown in Figure 4.
In Fig. 4, A, E, L is the same.Pin 5 is minimized d1min, and dowel hole 6 is maximized D1max, and rhombus pin 4 takes maximum
Value d2max, dowel hole 3 are minimized D2min.Benchmark, which can rotate counterclockwise, at this time becomes JX2.
At new benchmark JX2, using the order under CAD software " mark " menu, the vertical coordinate in automatic measurement hole 1 is obtained
Maximum value Bmax and the vertical coordinate in hole 2 obtain minimum value Fmin.
Present invention can apply to machine design and manufacture, in Automobile Design and Manufacturing.Application case such as table 1, wherein
Bmax, Bmin, Fmax, Fmin data are obtained by the present invention as a result, remainder data is provided by designing.Parameter definition is the same.
1 cabinet of table processes Position with One Plane and Two Holes positioning datum rotation error numerical procedure and result
| Serial number | Parameter | Dimension | Numerical procedure | Serial number | Parameter | Dimension | Numerical procedure |
| 1 | A | mm | 120.00 | 12 | D1min | mm | 14.00 |
| 2 | E | mm | 210.00 | 13 | d1 | mm | 14.00 |
| 3 | L | mm | 305.00 | 14 | D2 | mm | 20.00 |
| 4 | B | mm | 165.00 | 15 | d2 | mm | 20.00 |
| 5 | F | mm | 220.00 | 16 | d1max | mm | 14.017 |
| 6 | D1 | mm | 20.00 | 17 | D2max | mm | 20.021 |
| 7 | Bmax | mm | 165.012 | 18 | d2max | 20.02 | |
| 8 | Fmax | mm | 220.002 | 19 | d1min | 14.006 | |
| 9 | D1max | Mm | 14.018 | 20 | D2min | 20.00 | |
| 10 | Bmin | mm | 164.985 | 21 | d2min | 20.007 | |
| 11 | Fmin | mm | 43.995 | 22 |
The above examples only illustrate the technical idea of the present invention, and this does not limit the scope of protection of the present invention, all
According to the technical idea provided by the invention, any changes made on the basis of the technical scheme each falls within the scope of the present invention
Within.
Claims (4)
1. a kind of method of determining box body hole system processing Position with One Plane and Two Holes positioning datum rotation error, it is characterised in that including walking as follows
It is rapid:
Step 1, cabinet processing technology CAD model is drawn according to 1:1 ratio, embodied between box body hole system position and setting element
Geometrical relationship；
Step 2, it is assumed that the foozle in the diamond positioning pin hole on the diamond positioning pin and cabinet on fixture is 0, on fixture
The foozle in the Cylindrical locating pins hole on Cylindrical locating pins and cabinet is 0, and it is fixed that simulation Position with One Plane and Two Holes position fixing process is established
Relationship between bit unit and hole system position establishes two dimensional model using CAD software, defines the level that box body hole fastens the first hole
The horizontal coordinate E of coordinate A and the second hole；
Step 3, consider that the tolerance of setting element, simulator locating process establish the clockwise mould of cabinet machining benchmark using CAD software
The centre distance of type, the first hole and the second hole is constant, obtains vertical coordinate minimum value and the second hole that box body hole fastens the first hole
Vertical coordinate maximum value；
Step 4, consider that the tolerance of setting element, simulator locating process establish cabinet machining benchmark using CAD software and reverse mould
The centre distance of type, the first hole and the second hole is constant, obtains vertical coordinate maximum value and the second hole that box body hole fastens the first hole
Vertical coordinate minimum value.
2. the method for determining box body hole system processing Position with One Plane and Two Holes positioning datum rotation error as described in claim 1, feature
Be: in the step 2, the content of Position with One Plane and Two Holes position fixing process is: when positioning, make workpiece location hole and detent fit, it is fixed
Position pin axis direction is positioned on fixture.
3. the method for determining box body hole system processing Position with One Plane and Two Holes positioning datum rotation error as described in claim 1, feature
Be: in the step 3, the diamond positioning pin hole on cabinet is maximized, and the diamond positioning pin on fixture is minimized, fixture
On Cylindrical locating pins be maximized, Cylindrical locating pins hole is minimized on cabinet.
4. the method for determining box body hole system processing Position with One Plane and Two Holes positioning datum rotation error as described in claim 1, feature
Be: in the step 4, the diamond positioning pin hole on cabinet is minimized, and the diamond positioning pin on fixture is maximized, fixture
On Cylindrical locating pins be minimized, the Cylindrical locating pins hole on cabinet is maximized.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811066224.7A CN109211158B (en) | 2018-09-13 | 2018-09-13 | Method for determining positioning reference rotation error of two holes on one side of box hole series processing |
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|---|---|---|---|
| CN201811066224.7A CN109211158B (en) | 2018-09-13 | 2018-09-13 | Method for determining positioning reference rotation error of two holes on one side of box hole series processing |
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| CN109211158A true CN109211158A (en) | 2019-01-15 |
| CN109211158B CN109211158B (en) | 2021-06-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112917241A (en) * | 2021-03-02 | 2021-06-08 | 清华大学深圳国际研究生院 | Hole series form and position error correction method |
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| CN206578584U (en) * | 2017-03-13 | 2017-10-24 | 唐山华鼎机械制造有限公司 | Clamp with one surface and two pins |
| CN108280307A (en) * | 2018-01-31 | 2018-07-13 | 厦门理工学院 | Engine cylinder body opening system location determining method |
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| JP2008149382A (en) * | 2006-12-14 | 2008-07-03 | Incs Inc | Method and system for generating nc data for boring |
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| CN112917241A (en) * | 2021-03-02 | 2021-06-08 | 清华大学深圳国际研究生院 | Hole series form and position error correction method |
| CN112917241B (en) * | 2021-03-02 | 2022-02-11 | 清华大学深圳国际研究生院 | Hole series form and position error correction method |
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