CN109357646A - A kind of contact-type detection and its method of gas turbine engine blade wax-pattern - Google Patents
A kind of contact-type detection and its method of gas turbine engine blade wax-pattern Download PDFInfo
- Publication number
- CN109357646A CN109357646A CN201811452966.3A CN201811452966A CN109357646A CN 109357646 A CN109357646 A CN 109357646A CN 201811452966 A CN201811452966 A CN 201811452966A CN 109357646 A CN109357646 A CN 109357646A
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- Prior art keywords
- wax
- pattern
- clamping device
- blade
- contact
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 48
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- 239000007787 solid Substances 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 238000009825 accumulation Methods 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 17
- 238000003466 welding Methods 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 2
- 238000003723 Smelting Methods 0.000 abstract 1
- 239000001993 wax Substances 0.000 description 32
- 238000005495 investment casting Methods 0.000 description 5
- 238000005266 casting Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000012188 paraffin wax Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 235000021355 Stearic acid Nutrition 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000002224 dissection Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004153 renaturation Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
The present invention is the contact-type detection and its method of a kind of gas turbine engine blade wax-pattern, and the detection device includes pedestal, technological ball, blade wax mould and measuring device；The measuring device includes vertical bar, cross bar, material mouth, heating device and clamping device；The present invention can effectively improve the rigidity of detected wax-pattern, and then ensure that measurement process can satisfy the repeatability of measuring system, reproducibility requirement, improve the accuracy of wax-pattern size detection；By the design of material mechanism, the accurate control of material mechanism smelting material amount and material mouth position, height is realized, when being effectively improved manual material, welding, the otherness of wax-pattern fixing intensity and position improves the consistency of welding.
Description
Technical field
The present invention relates to contact type measurement field more particularly to a kind of gas turbine engine blade wax-patterns of hot investment casting
Contact-type detection and its method.
Background technique
Gas-turbine unit is widely used in the fields such as aerospace, the energy, naval vessel, the core as turbogenerator
Center portion part, turbo blade have the characteristics that structure is complicated, it is more to measure size parameter, accuracy of manufacture requirement is high, and dimensional accuracy is straight
Connect the thermal efficiency and service life for influencing gas-turbine unit.Due to the special structure of turbo blade, in existing technology item
Precision investment casting is the best method for manufacturing turbo blade under part.The performance indicator of mould material and the quality of precision casting have directly
Relationship, directly affect the dimensional accuracy and quality of precision casting.Since cerul mould material is similar with paraffin refined wax chemical structure, and
Stearic acid in cerul mould material can dissolve each other with paraffin, it is made to be coated with performance, good flowing properties, be conducive to mould material in pressure injection
It can be full of entire type chamber, while the thermal stability of entire mould material is also higher, fusing point is low, and technological process is simple, being coated with property
It can be widely used in the mould material of precision investment casting fusible pattern with the good feature of multiplexing performance.
However cerul mould material does not have enough rigidity at normal temperature, the dimensional stability and deformation extent of wax-pattern will be very big
Ground influences the quality state of casting, so being particularly significant and necessary to the size Control of wax-pattern to prevent the deformation of casting
's.Special type face and higher testing requirements for turbo blade will realize the accurate detection to its size and Form and position error
It is more difficult.For the size detection precision and consistency for guaranteeing wax-pattern, it would be highly desirable to improve the higher contact type measurement side of measurement accuracy
The stability of method.
The detection method of wax-pattern model is broadly divided into contact and contactless two major classes.Contact type measurement needs make to sense
Device gauge head directly contacts wax-pattern model, and three dimensional space coordinate when record gauge head and model contact is to reach to moulded dimension, wheel
The purpose that exterior feature is detected, contact type measurement main representative are three coordinate measuring machine.Non-cpntact measurement be mainly based upon light, sound,
Magnetic etc. acquires physical analogy amount by sensor, then is converted into the characteristic parameter of model surface profile by respective algorithms, mainly
It is represented as optical scanning method.
Contact type measurement and non-contact measurement have respective advantage.The advantages of contact type measurement includes: (1) mechanical structure
And electronic system is quite mature, therefore have higher accuracy and reliability；(2) with the reflection characteristic on measured piece surface, color
And curvature relationship is little；(3) measured piece is fixed on three coordinate measuring machine, and conjunction measuring software can be measured rapidly and accurately
The basic geometry on measured piece surface, such as face, circle, cylinder, circular cone, ball.The advantages of non-contact measurement, has: (1) arranging
Except contact measurement interferes the stress such as artificial that flexible article measures；(2) some impalpable objects can be measured, are such as radiated
Body, high temp objects etc. (3) are because be Digital Image Processing, computer identification, thus acquire fast speed.
Currently, generalling use Contacting three coordinates measurement machine testing blade of aviation engine and its wax-pattern in industry.Pass through
Testee is placed in three-dimensional coordinates measurement space, can get the coordinate position of each measuring point on testee, the sky put according to these
Between coordinate value, be computed the geometric dimension, shape and position for finding out testee, with the reflection characteristic on testee surface,
Color and curvature relationship are little, accuracy and reliability with higher.
Three coordinate measuring machine detection accuracy is higher, but it is when detecting wax-pattern model, gauge head directly with wax-pattern mould
Body contact, since gas turbine engine blade wax model is more elongated and quality of wax is softer, this contact can cause wax
Mould generates biggish deformation, influences measurement accuracy.
Summary of the invention
For the present invention for three coordinate measuring machine when measuring wax model, measuring probe contact blade causes measurement result to produce
The problem of raw large error, blade free end is connected with bracket using after material molten identical with leaf model, is reached
Purpose of the fixed model to be convenient for measuring.This method needs when taking full advantage of blade casting and needs the blade of excision to emit after molding
Mouthful, will not have an adverse effect to blade casting process, and stable connection is reliable, it is easy to operate.
The present invention is that detection device described in a kind of contact-type detection of gas turbine engine blade wax-pattern includes bottom
Seat, technological ball, blade wax mould and measuring device；The measuring device includes vertical bar, cross bar, material mouth, heating device and clamping
Device；The pedestal is set on three coordinate measuring machine；The technological ball is fixed on the base, for positioning；The vertical bar is perpendicular
Directly it is fixed on the base；The cross bar is flexibly connected with vertical bar, cross bar it is height-adjustable；The material mouth is fixed on cross bar
On；Heating device is provided at the material mouth；The vertical clamping of blade wax mould clamping device is on pedestal；The blade
Wax-pattern top is fixedly installed wax-pattern riser, for the company of being formed by curing after the wax material bonding of the natural packing with material mouth molten wax
It connects, fixed blade wax-pattern facilitates detection；The clamping device is set on pedestal.
Further, material mouth bottom end bore is 3-4mm, apart from wax-pattern riser 2-5mm.
Further, the vertical bar and cross bar by bolt and nut exert a force hold-down mechanism, pneumatic inclined-plane force hold-down mechanism,
Hydraulic oblique force hold-down mechanism, eccentric force hold-down mechanism or servo motor driving compress.
Further, cross bar can be moved up and down by Serve Motor Control in vertical bar, accurately control mobile height, with
Realize that the gap of material mouth and wax-pattern riser controls.
Further, the clamping device includes clamping device fixing end and clamping device movable end, the clamping device
Movable end can be flexibly connected by screw thread, compression spanner or pneumatic mode with clamping device fixing end, to be matched for clamping tightly device
The root of fixing end compression blade wax mould.
Further, the heating device is heating wire.
A kind of detection method of the contact-type detection of gas turbine engine blade wax-pattern, including following steps
Step 1: the pedestal equipped with measuring device and technological ball is placed on three coordinate measuring machine；
Step 2: by blade wax mould to be measured through the vertical clamping of clamping device on pedestal；
Step 3: adjusting the height of cross bar by servo motor, makes material mouth alignment wax-pattern riser center and apart from wax-pattern riser
The position of fixed transverse rod at 2-5mm；
Step 4: solid state wax is placed in magazine, connects the heating of heating device power supply；
Step 5: it is flowed out after solid state wax melting through material mouth, is gradually accumulated at wax-pattern riser center and is connected to material mouth
It is formed together molten state stock column, then cuts off the power supply of heating device；
Step 6: after technological ball positions centering, three coordinate measuring machine starts to measure blade wax mould；
Step 7: connecting heating device after being measured, be detached from cross bar and blade wax mould after accumulating wax in molten condition and connect
It connects；
Step 8: knife is scalded with wax-pattern and cuts away accumulation wax remaining on wax-pattern riser；
Step 9: it unclamps clamping device and removes blade wax mould.
The present invention can effectively improve the rigidity of detected wax-pattern, and then ensure that measurement process can satisfy the weight of measuring system
Renaturation, reproducibility requirement, improve the accuracy of wax-pattern size detection；By the design of material mechanism, material mechanism material is realized
The accurate control of amount and material mouth position, height, when being effectively improved manual material, welding, the difference of wax-pattern fixing intensity and position
The opposite sex improves the consistency of welding.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
Fig. 2 is material mouth structure schematic diagram of the present invention.
Fig. 3 is clamping device structural schematic diagram of the invention.
Specific embodiment
With reference to Fig. 1 and 2,
A kind of contact-type detection of gas turbine engine blade wax-pattern, the detection device include pedestal 1, technological ball 2,
Blade wax mould 8 and measuring device；The measuring device includes vertical bar 3, cross bar 4, material mouth 5, heating device 6 and clamping device 9；
The pedestal 1 is set on three coordinate measuring machine；The technological ball 2 is fixed on pedestal 1, for positioning；The vertical bar 3 is vertical
It is fixed on pedestal 1；The cross bar 4 is flexibly connected with vertical bar 3, cross bar 4 it is height-adjustable；The material mouth 5 is fixed on cross
On bar 4；Heating device 6 is provided at the material mouth 5；The blade wax mould 8 is with the vertical clamping of clamping device 9 on pedestal 1；
8 top of blade wax mould is fixedly installed wax-pattern riser 7, and the wax material for the natural packing with 5 molten wax of material mouth bonds
After be formed by curing connection, fixed blade wax-pattern 8 facilitates detection；The clamping device 9 is set on pedestal 1, the clamping device
9 include clamping device fixing end 13 and clamping device movable end 14, and the clamping device movable end 14 can be pulled by screw thread, compression
Hand or pneumatic mode are flexibly connected with clamping device fixing end 13, compress blade wax mould 8 to be matched for clamping tightly device fixing end 13
Root.The heating device 6 is heating wire 11.
It installation detecting device and is detected according to the following steps:
Step 1: the pedestal 1 equipped with measuring device and technological ball 2 is placed on three coordinate measuring machine；
Step 2: by blade wax mould 8 to be measured through the vertical clamping of clamping device 9 on pedestal 1；
Step 3: adjusting the height of cross bar 4 by servo motor, so that material mouth 5 is directed at 7 center of wax-pattern riser and emits apart from wax-pattern
Mouth 7 is the position of fixed transverse rod 4 at 2-5mm；
Step 4: solid state wax is placed in magazine 10, connects 6 power supply of heating device；
Step 5: it is flowed out after solid state wax melting through material mouth 5, is gradually accumulated at 7 center of wax-pattern riser and is connect with material mouth 5
Molten state stock column 12 is formed together, then the power supply of dissection heating device 6；
Step 6: after technological ball 2 positions centering, three coordinate measuring machine starts to measure blade wax mould 8；
Step 7: connecting heating device 6 after being measured, is detached from cross bar 4 and blade wax mould 8 after accumulating wax in molten condition
Connection；
Step 8: knife is scalded with wax-pattern and cuts away accumulation wax remaining on wax-pattern riser 7；
Step 9: it unclamps clamping device 9 and removes blade wax mould 8.
Claims (7)
1. a kind of contact-type detection of gas turbine engine blade wax-pattern, it is characterised in that: the detection device includes
Pedestal (1), technological ball (2), blade wax mould (8) and measuring device；The measuring device includes vertical bar (3), cross bar (4), material
Mouth (5), heating device (6) and clamping device (9)；The pedestal (1) is set on three coordinate measuring machine；The technological ball (2)
It is fixed on pedestal (1), for positioning；The vertical bar (3) is fixed on vertically on pedestal (1)；The cross bar (4) and vertical bar (3)
Be flexibly connected, cross bar (4) it is height-adjustable；The material mouth (5) is fixed on cross bar (4)；It is arranged at the material mouth (5)
There are heating device (6)；The blade wax mould (8) is with clamping device (9) vertical clamping on pedestal (1)；The blade wax mould (8)
Top is fixedly installed wax-pattern riser (7), for being formed by curing after bonding with the wax material of the natural packing of material mouth (5) molten wax
Connection, fixed blade wax-pattern (8) facilitate detection；The clamping device (9) is set on pedestal (1).
2. a kind of contact-type detection of gas turbine engine blade wax-pattern according to claim 1, feature exist
In: material mouth (5) the bottom end bore is 3-4mm, apart from wax-pattern riser (7) 2-5mm.
3. a kind of contact-type detection of gas turbine engine blade wax-pattern according to claim 1, feature exist
In: the vertical bar (3) and cross bar (4) pass through bolt and nut force hold-down mechanism, pneumatic inclined-plane force hold-down mechanism, hydraulic oblique
Exert a force hold-down mechanism, eccentric force hold-down mechanism or servo motor driving compression.
4. a kind of contact-type detection of gas turbine engine blade wax-pattern according to claim 1, feature exist
In: cross bar (4) can be moved up and down by Serve Motor Control in vertical bar (3), mobile height be accurately controlled, to realize material
The gap of mouth and wax-pattern riser controls.
5. a kind of contact-type detection of gas turbine engine blade wax-pattern according to claim 1, feature exist
In: the clamping device (9) includes clamping device fixing end (13) and clamping device movable end (14), the clamping device activity
End (14) can be flexibly connected by screw thread, compression spanner or pneumatic mode with clamping device fixing end (13), to be matched for clamping tightly
Device fixing end (13) compresses the root of blade wax mould (8).
6. the contact-type detection of -5 any a kind of gas turbine engine blade wax-patterns according to claim 1,
Be characterized in that: the heating device (6) is heating wire (11).
7. a kind of detection side of the contact-type detection of gas turbine engine blade wax-pattern according to claim 1
Method, it is characterised in that: including following steps
Step 1: the pedestal (1) equipped with measuring device and technological ball (2) is placed on three coordinate measuring machine；
Step 2: by blade wax mould to be measured (8) through the vertical clamping of clamping device (9) on pedestal (1)；
Step 3: adjusting the height of cross bar (4) by servo motor, makes material mouth (5) alignment wax-pattern riser (7) center and distance
The position of fixed transverse rod (4) at wax-pattern riser (7) 2-5mm；
Step 4: solid state wax is placed in magazine (10), connects the heating of heating device (6) power supply；
Step 5: it flows out after solid state wax melting through material mouth (5), is gradually accumulated to and material mouth at wax-pattern riser (7) center
(5) molten state stock column (12) are joined together to form, the power supply of heating device (6) is then cut off；
Step 6: after technological ball (2) position centering, three coordinate measuring machine starts to measure blade wax mould (8)；
Step 7: connecting heating device (6) after being measured, by cross bar (4) and blade wax mould after accumulating wax in molten condition
(8) it is disconnected；
Step 8: knife is scalded with wax-pattern and cuts away accumulation wax remaining on wax-pattern riser (7)；
Step 9: it unclamps clamping device (9) and removes blade wax mould (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811452966.3A CN109357646A (en) | 2018-11-30 | 2018-11-30 | A kind of contact-type detection and its method of gas turbine engine blade wax-pattern |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811452966.3A CN109357646A (en) | 2018-11-30 | 2018-11-30 | A kind of contact-type detection and its method of gas turbine engine blade wax-pattern |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109357646A true CN109357646A (en) | 2019-02-19 |
Family
ID=65330349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811452966.3A Pending CN109357646A (en) | 2018-11-30 | 2018-11-30 | A kind of contact-type detection and its method of gas turbine engine blade wax-pattern |
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| Country | Link |
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| CN (1) | CN109357646A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111975672A (en) * | 2020-07-24 | 2020-11-24 | 江苏大学 | Blade measuring clamp and measuring method |
| CN113029056A (en) * | 2019-07-01 | 2021-06-25 | 中国航发常州兰翔机械有限责任公司 | Working method of turbine blade pouring box alignment device |
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